Tren de rodaje SMCS - 4150
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Ilustración 1
Tren de rodaje ( máquinas XL y XW) (1) Rueda tensora delantera (2) Bastidor de rodillos delantero (3) Bastidor de rodillos trasero (4) Rodillo superior ( máquinas XL, XW y LGP) (5) Rodillos inferiores (6) Eje pivote
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(7) Rueda tensora trasera (8) Cadena
El tren de rodaje es similar a otros modelos que están diseñados con una rueda motriz elevada. Los siguientes son los componentes principales del tren de rodaje: ejes pivotes (6), barra compensadora, bastidor de rodillos de cadena delanteros (2), bastidor de rodillos de cadena traseros (3), rodillo superior (4), rodillos inferiores (5), rueda tensora delantera (1), rueda tensora trasera (7) y cadenas (8) . Los ejes pivotes (6) conectan los bastidores de rodillos en la parte trasera de la máquina. Cada bastidor de rodillos puede oscilar en el eje pivote. La barra compensadora conecta los dos bastidores de rodillos en la parte delantera del tractor. La barra compensadora controla la oscilación de los bastidores de rodillos. Los bastidores de rodillos inferiores constan del bastidor delantero (2) y del bastidor trasero (3). La rueda tensora delantera (1) está instalada en el bastidor delantero. La rueda tensora trasera (7) y el rodillo inferior (5) están instalados en el bastidor trasero. Las cadenas (8) son selladas y lubricadas para un desgaste incrementado. Un grupo de ajustador de cadena y tensor que está instalado en el bastidor trasero (3) mantiene las cadenas ajustadas.
Configuraciones de tren de rodaje Estándar
Para cada lado de la máquina, el tren de rodaje estándar tiene seis rodillos inferiores. Todos los rodillos inferiores son de pestaña sencilla. Baja presión sobre el suelo
Para cada lado de la máquina, el tren de rodaje LGP (baja presión sobre el suelo) tiene ocho rodillos inferiores. Todos los rodillos inferiores son de pestaña sencilla . Largo extendido y ancho extendido
Para cada lado de la máquina, el tren de rodaje XL (largo extendido) y el tren de rodaje XW (ancho extendido), tiene siete rodillos inferiores. Todos los rodillos inferiores son de pestaña sencilla.
Eje pivote SMCS - 4153
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Ilustración 1
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Eje pivote (1) Bastidor principal de la máquina (2) Cojinete (3) Bastidor de rodillos inferiores (4) Cojinete (5) Eje pivote
Cada eje pivote (5) conecta el bastidor de la máquina (1) con uno de los dos bastidores de las cadenas (3). Cada bastidor de rodillos inferiores puede oscilar en los cojinetes (2) y (4) en el eje pivote. Los cojinetes grandes (2) y (4) en un compartimiento de aceite sellado que se encuentra en el bastidor de rodillos inferiores (3) soportan el eje pivote (5).
Nivel del aceite del compartimiento del resorte tensor - Comprobar SMCS - 4158-535
El aceite y los componentes calientes pueden causar lesiones personales. No deje que el aceite o los componentes calientes hagan contacto con la piel. Ver imagen
Ilustración 1
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1. Quite toda la basura que esté alrededor de la tapa, en la parte superior del bastidor de rodillos inferiores. 2. Saque la plancha de cubierta de llenado del aceite. Observe el nivel del aceite. Ver imagen
Ilustración 2
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3. Mantenga el nivel del aceite por encima de la parte superior del cilindro tensor de la cadena (1). No llene el aceite por encima de la válvula de ajuste de cadena (2) . 4. Instale la plancha de cubierta. 5. Repita el procedimiento para el otro compartimiento del resorte tensor.
Cadena - Comprobar/Ajustar SMCS - 4170-036
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Ilustración 1
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Compruebe el ajuste de las cadenas. Compruebe la cadena para determinar si hay desgaste o excesiva acumulación de suciedad.
La grasa está bajo alta presión. La grasa que sale por la válvula de alivio puede penetrar el cuerpo y causar lesiones o la muerte. No observe la válvula de alivio para ver si hay fuga de grasa. Observe la cadena o el cilindro tensor de la cadena para ver si se está aflojando la cadena. Afloje la válvula de alivio una vuelta solamente. 1. Mueva la máquina hacia adelante. Deje que la máquina se desplace en rueda libre hasta que se detenga sin utilizar el freno de servicio. Ajuste las cadenas mientras la máquina está en las condiciones típicas de operación. Si en el lugar de trabajo predominan las condiciones de compactación, se deben ajustar las cadenas sin quitar el material compactado. 2. Para medir la comba de la cadena, tense una cuerda sobre las garras que están entre la rueda motriz y la rueda guía delantera. Tome la medida desde la cuerda hasta la parte superior de la garra para obtener la medición máxima. La dimensión (A) es la distancia máxima entre la cuerda y la garra. Ver imagen
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Ilustración 2
Si una máquina no tiene rodillos superiores, la comba en la cadena se mide entre la rueda motriz y la rueda guía delantera. El ajuste correcto de la dimensión (A) del tren de rodaje convencional es de 115 ± 10 mm (4,5 ± 0,4 pulg). Consulte las siguientes tablas para obtener información acerca del tren de rodaje SystemOne, si tiene. Tabla 1 Tensión de la cadena No tiene rodillo superior Convencional SystemOne (1) (1)
Mínima
Objetivo
Máxima
105 mm (4,1 pulg)
115 mm (4,5 pulg)
125 mm (4,9 pulg)
80 mm (3,15 pulg)
110 mm (4,30 pulg)
120 mm (4,72 pulg)
Las máquinas con el tren de rodaje SystemOne tiene dimensiones ajustadas de la tensión de la cadena.
Ver imagen
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Ilustración 3
Si la máquina está equipada con un rodillo superior, calcule el promedio de la dimensión (B) y la dimensión (C). El valor promedio correcto es 65 ± 10 mm (2,6 ± 0,4 pulg) para el tren de rodaje convencional. Tabla 2
Tensión de la cadena Rodillo portador Convencional SystemOne (1)
Mínima
Objetivo
Máxima
55 mm (2,2 pulg)
65 mm (2,6 pulg)
75 mm (3,0 pulg)
45 mm (1,80 pulg)
60 mm (2,40 pulg)
70 mm (2,8 pulg)
Ajuste de una cadena floja Ver imagen
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Ilustración 4
ATENCION No intente apretar la cadena cuando la dimensión (D) sea de 152 mm (6,0 pulg) o más. El accesorio inferior duro puede apretarse hasta el punto que (D) no sea mayor que 152 mm (6,0 pulg)Póngase en contacto con su distribuidor Caterpillar para efectuar el servicio de las cadenas u obtener instrucciones. 1. Quite la tapa de acceso. Ver imagen
Ilustración 5
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2. Añada grasa de molibdeno de uso múltiple (MPGM) a través de la válvula de ajuste de la cadena (1). Añada la grasa MPGM hasta que la dimensión (A, B, C) sea correcta. 3. Mueva la máquina hacia atrás y hacia adelante para estabilizar la presión. Deje que la máquina se desplace en rueda libre hasta que se detenga completamente. No utilice los frenos. 4. Vuelva a medir la dimensión (D) .
Ajuste de una cadena apretada 1. Afloje la válvula de alivio (2) una vuelta completa de 360 grados. Deje que salga la grasa. 2. Cierre la válvula de alivio. 3. Añada grasa MPGM a través de la válvula de ajuste de la cadena (1). Añada grasa hasta que la dimensión (A, B, C) sea correcta. 4. Instale la tapa de acceso.
Par de apriete de las zapatas de cadena El requisito de par de apriete para los pernos de zapata de cadena es de 650 ± 70 N·m (480 ± 50 lb-pie). Apriete los pernos 120 grados adicionales. Si se utilizan pernos con un eslabón maestro, apriete los pernos a un par de 650 ± 70 N·m (480 ± 50 lb-pie). Después, apriete los pernos 120 grados adicionales.
Nivel del aceite del eje pivote - Comprobar SMCS - 4153-535-FLV
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Ilustración 1
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El aceite tiene que ser visible a través de la mirilla indicadora (1) . Abra la puerta de acceso (2) a la caja de batería en el guardabarros izquierdo. Ver imagen
Ilustración 2
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Vista superior
Para llenar el depósito, añada aceite a través de la abertura de la varilla de medición (3). Ver imagen
Ilustración 3
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Mantenga el nivel de aceite dentro de los límites LLENO (4) y AGREGAR (5) de la varilla de medición del depósito de aceite. No llene el depósito excesivamente. El aceite caliente puede rebosar del depósito. Nota: El llenado inicial del eje de pivote puede atrapar aire en el tubo. El nivel de aceite puede descender a medida que se escapa el aire. La presión barométrica puede elevar el nivel de aceite o la presión puede disminuir el nivel de aceite. Los cambios en la altitud pueden elevar el nivel de aceite o la altitud puede disminuir el nivel de aceite. Hay que llenar varias veces el depósito para que éste se mantenga lleno. Nota: No cambie el método de Llenado al vacío.
Descripción de características, información SMCS - 4150
Tractores de Cadenas: D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8Rserie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) ReferenciaConsulte la Instrucción Especial, REHS4336, "Descripción de características, servicio de información e identificación de partes para el Tren de Rodaje SystemOne D8" para obtener información acerca del tren de rodaje SystemOne de los Tractores de Cadenas D8N, D8R, D8R serie II y D8T. La Instrucción Especial indicada anteriormente contiene la siguiente información acerca del Tren de Rodaje SystemOne D8: • • • • • • • • • • •
Conjunto de cartucho SystemOne de Caterpillar con un buje giratorio Eslabones maestros serrados Segmentos de acero resistentes con siete pernos Diseño de eslabón y Rueda Guía de Banda de Rodadura Central (CTI) resistente al desgaste por la torsión lateral axial Fácil modernización de las máquinas D8N, D8R y D8T Posicionamiento de la rueda guía SystemOne D8 Ajuste de cadena para tren de rodaje SystemOne D8 Piezas de repuesto reemplazables para la cadena SystemOne D8 Expectativas de vida útil de la cadena y del sistema SystemOne D8 Preinclinación del SystemOne D8 Tablas de desgaste de los componentes de tren de rodaje para cadenas SystemOne D8
Nota: El tren de rodaje SystemOne D8 no recomendado para configuraciones de tren de rodaje no suspendido. Actualmente, la configuración de amortiguación de los bastidores de cadena no suspendidos no permite tanto desplazamiento de amortiguación como el de los bastidores de rodillos de cadena suspendidos. Esto limita la capacidad del sistema de tren de rodaje para adaptarse a los efectos del conjunto de caja de eslabones, lo que puede producir la avería prematura de los sellos debido a la entrada de material a su alrededor. Además, no hay un conjunto de protección disponible para evitar la entrada de material alrededor de las ruedas guía.
Track Rollers SMCS - 4180
Número de pieza - 246-0779 Número de pieza - 278-9539 Número de pieza - 278-9538 Número de pieza - 278-9540 Número de pieza - 246-0775 Número de pieza - 278-9541
Single Flange Track Roller Ver imagen
Illustration 1
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ReferenceRefer to Specifications, "Track Carrier Roller" for the specifications of the single flange track roller.
Double Flange Track Roller Ver imagen
Illustration 2
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End play (clearance) of the roller shaft: Minimum ... 0.26 mm (0.010 inch) Maximum ... 1.26 mm (0.050 inch)
(1) Diameter of double flange roller tread ... 241.0 mm (9.48 inch) (1) Diameter of single flange roller tread ... 247.0 mm (9.72 inch) (2) Torque for 12 bolts ... 135 ± 20 N·m (100 ± 15 lb ft) (3) Protrusion of the plug from the stopper ... 0 to 5 mm (0 to 0.20 inch)
Note: The plug must NOT be recessed below the surface of the stopper after the roller is assembled. (4) Torque for bolts that hold the rollers to the bogies ... 750 ± 70 N·m (553 ± 51 lb ft) (5) Bearing depth ... 19.0 ± 0.5 mm (.75 ± .02 inch) Note: Rubber toric seals must be clean and dry at assembly. All surfaces that contact the toric seals must be clean and dry at assembly. At assembly, apply a thin film of oil to the contacting surfaces of the metal seal. Seal rings must be assembled squarely with the bore. The toric ring must not bulge and the toric ring must not be twisted.
Roller Placement Suspended Undercarriage, and Sealed and Lubricated Track (SALT)
Start at the front of the machine: No. 1 track roller is a single flange. 246-0775 No. 2 track roller is a single flange. 246-0775 No. 3 track roller is a double flange. 246-0779 No. 4 track roller is a double flange. 246-0779 No. 5 track roller is a double flange. 246-0779 No. 6 track roller is a double flange. 246-0779 No. 7 track roller is a single flange. 246-0775 No. 8 track roller is a single flange. 246-0775 Suspended Undercarriage with Special Application Arctic Track Rollers
Start at the front of the machine: No. 1 track roller is a single flange. 278-9539 No. 2 track roller is a single flange. 278-9539 No. 3 track roller is a double flange. 278-9540 No. 4 track roller is a double flange. 278-9540 No. 5 track roller is a double flange. 278-9540 No. 6 track roller is a double flange. 278-9540
No. 7 track roller is a single flange. 278-9539 No. 8 track roller is a single flange. 278-9539 Suspended Undercarriage with Special Application Extreme Heat Track Rollers
Start at the front of the machine: No. 1 track roller is a single flange. 278-9538 No. 2 track roller is a single flange. 278-9538 No. 3 track roller is a double flange. 278-9541 No. 4 track roller is a double flange. 278-9541 No. 5 track roller is a double flange. 278-9541 No. 6 track roller is a double flange. 278-9541 No. 7 track roller is a single flange. 278-9538 No. 8 track roller is a single flange. 278-9538 SystemOne Undercarriage
No. 1 through No. 8 track rollers are all single flange rollers. 246-0775 Non-Suspended Undercarriage with Sealed and Lubricated Track (SALT)
No. 1 through No. 8 track rollers are the double flange rollers. 246-0779 Non-Suspended Undercarriage with Special Application Arctic Track Rollers
No. 1 through No. 8 track rollers are the double flange rollers. 278-9540 Non-Suspended Undercarriage with Special Application Extreme Heat Track Rollers
No. 1 through No. 8 track rollers are the double flange rollers. 278-9541 Suspended Undercarriage with Sealed and Lubricated Track (SALT), Non-Suspended Undercarriage (SALT), or SystemOne Undercarriage Table 1 Prime Attachments
Machine
Part
Description
Number
206-6783
Track-Type Tractor D8T Standard Arrangement. Includes Suspension-type Undercarriage and 8 roller tubular track roller frames, carrier roller ready
192-2599
Carrier Rollers for use with Suspended Undercarriage
209-3418
Non-Suspended Undercarriage that does not include carrier rollers
209-3419
Non-Suspended Undercarriage that includes carrier rollers
310-2848
SystemOne Undercarriage with Center Tread Idler (CTI)
310-2849
SystemOne Undercarriage with Standard Idler
D8T
103-0127
Track-Type Tractor D8R Standard Arrangement. Includes Suspended Undercarriage and 8 roller tubular track roller frames, carrier roller ready
192-2599
Carrier Rollers for use with Suspended Undercarriage
209-3418
Non-Suspended Undercarriage that does not include carrier rollers
209-3419
Non-Suspended Undercarriage that includes carrier rollers
310-2848
SystemOne Undercarriage with Center Tread Idler (CTI)
310-2849
SystemOne Undercarriage with Standard Idler
D8R
Cambios en los rodillos inferiores y la guía de cadena SMCS - 4150; 4177; 4180
Tiendetubos:
578 (N/S: 8HB1-Y SIG.) Tractor de cadenas: D8L (N/S: 4FB1-Y SIG.; 7YB1-Y SIG.; 7JC1-Y SIG.; 53Y1-Y SIG.) D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8Rserie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) ReferenciaInstrucción Especial, REHS4336, "Descripción de características, información de servicio e identificación de piezas para el tren de Rodaje SystemOne del D8" ReferenciaInstrucción Especial, REHS3373, "Conversión de los D8N, D8R y D8T al sistema de tren de rodaje SystemOne" ReferenciaNoticiero IRM, PELJ0711, "Nuevos grupos de rodillos inferiores y guías de cadena del D8T" Description of Change: Nuevos grupos de rodillos inferiores y guías de cadena para el tren de rodaje del tamaño del D8 vieron la luz anteriormente en el 2006. Los nuevos rodillos tienen 7 mm (0,276 pulg) más de ancho entre las pestañas. Con este cambio, y para proporcionar espacio libre apropiado a los eslabones, se redujo el ancho a las guías de cadena en 3,5 mm (0,138 pulg). Los nuevos rodillos y las guías deben instalarse juntos para proporcionar mejor espacio libre de operación entre el conjunto de eslabón y las guías de cadena. La mezcla de las guías anteriores con los nuevos rodillos puede causar desgaste excesivo en los eslabones y extremos de pasador. El desgaste puede ser más notorio en la cadena SystemOne del D8 y puede crear agrietamiento en el eslabón. El número de pieza de la guía de cadenas de D8 y 578 anterior todavía se usa en el tren de rodaje de los D9, 583 y 587 puede usarse comúnmente en las reconstrucciones de bastidor de los rodillos inferiores. Aunque la guía de cadenas anterior se ajusta al bastidor de rodillos inferiores del D8, no use la guía anterior del D8 con los nuevos rodillos D8 debido a los problemas de espacio libre indicados arriba. Ver imagen
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Ilustración 1 (1) Rodillo inferior (2) Guía de cadena (3) Conjunto de eslabones de cadena (A) Nuevo rodillo de 240 mm (9,45 pulg) (B) Rodillo anterior de 233 mm (9,17 pulg) (C) Nueva guía 41,5 mm (1,63 pulg) (D) Guía anterior 45,0 mm (1,77 pulg)
Adaptable To: Los nuevos grupos de rodillos y las guías de cadena son un reemplazo directo de los grupos de rodillos y guías de cadena anteriores. Los nuevos rodillos y las guías deben instalarse como un conjunto completo. Los nuevos grupos de rodillo y las guías de cadena están vigentes en producción con las siguientes máquinas construidas en fábrica: • •
D8T (N/S: J8B734-Y SIG.; KPZ1290-Y SIG.) D8R (N/S: 9EM2919-Y SIG.) Tabla 1 Guías de las bandas de goma
No. de pieza anterior
No. de pieza nuevo
Descripción
Cant.
184-4395
248-2987
Guía
16
8C-6857
8T-8924
Perno
32
8T-4994
8T-4994
Arandela dura
32
Tabla 2 Grupos de rodillos inferiores No. de pieza anterior
No. de pieza nuevo
196-9946
246-0779
Rodillo inferior de pestaña doble
196-9947
246-0775
Rodillo inferior de pestaña simple
244-0881
278-9540
Grupo de rodillo inferior con pestaña doble (Ártico)
244-0880
278-9539
Grupo de rodillo inferior con pestaña simple (Ártico)
Descripción
244-0943
278-9541
Grupo de rodillo inferior de pestaña doble (Alta temperatura)
244-0942
278-9538
Grupo de rodillo inferior de pestaña simple (Alta temperatura) Tabla 3
Conjuntos de cojinetes y rodillos inferiores No. de pieza anterior
No. de pieza nuevo
196-9948
246-0780
196-9949
284-5456
Descripción Conjunto de cojinetes y rodillos inferiores (Pestaña doble) Conjuntos de cojinetes y rodillos inferiores (Pestaña simple)
Tapas de montaje mejoradas para rodillos y ruedas guía SMCS - 4159; 4180
Tiendetubos: 583R (N/S: 2XS1-Y SIG.) 583T (N/S: CMX1-Y SIG.) 587R (N/S: BXL1-Y SIG.) 587T (N/S: FAT1-Y SIG.) Tractores de Cadenas: D11N (N/S: 4HK1-Y SIG.; 74Z1-Y SIG.) D11R (N/S: AAF1-Y SIG.; 8ZR1-Y SIG.; 9TR1-Y SIG.; 9XR1-Y SIG.; 7PZ1-Y SIG.) D8L (N/S: 4FB1-Y SIG.; 7YB1-Y SIG.; 7JC1-Y SIG.; 53Y1-Y SIG.) D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) Description of Change: Se usan ahora tapas de montaje mejoradas en los rodillos y ruedas guía de las siguientes máquinas: • • •
D8L, D8N, D8R y D8T D11N y D11R 583R, 583T, 587R y 587T
Las nuevas tapas de montaje para las ruedas guía y cilindros tienen superficies de contacto para pernos que ahora están maquinadas. Las superficies maquinadas aseguran un contacto completo y uniforme entre e perno y la tapa. Esto es importante para mantener el par de apriete del perno, e impide que se aflojen los pernos de montaje. Además, la superficie maquinada es perpendicular al orificio del perno. La superficie maquinada también es paralela a la parte inferior de la tapa que hace contacto con el brazo basculante. De esta forma se asegura una alienación recta del perno con la tapa cuando se aplica el par de apriete, y por lo tanto se impide la rotura del perno durante su vida útil. Adaptable To: Ver imagen
Ilustración 1 Tapa de montaje anterior Ver imagen
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Ilustración 2 Tapa de montaje mejorada
Tabla 1 Modelo
Descripción y uso de la pieza
Número de pieza del conjunto de tapa anterior
Número de pieza del nuevo conjunto de tapa
Vigencia de números de serie de máquina
D11N D11R
Rodillo (dos pernos)
213-1745
306-9435
D11R (N/S: 7PZ1651Y SIG.; AAF1651-Y SIG.)
D8L D8N D8R D8T D9N D9R 578
Rueda guía (dos pernos)
131-1644
306-9441
D8T (N/S: KPZ2105-Y SIG.)
D8N D8R D8T 583R 583T 587R 587T
Rueda guía (dos pernos) (1)
D8N D8R D8T 583R
Rueda guía (dos pernos) (1)
131-1645
131-1646
306-9437
583T (N/S: CMX247-Y SIG.) 587T (N/S: FAT329-Y SIG.) 587R (N/S: BXL254-Y SIG.)
306-9439
583T (N/S: CMX247-Y SIG.) 587T (N/S: FAT329-Y SIG.)
583T 587R 587T (1)
587R (N/S: BXL254-Y SIG.)
Sólo para tren de rodaje no suspendidos
Tabla 2 Modelo
D11N D11R
D8L D8N D8R D8R serie II D8T 578
D8N D8R D8T 583R 583T 587R 587T
D8N D8R D8T 583R 583T 587R
Descripción y uso de la pieza
Rodillo (dos pernos)
Rueda guía (dos pernos)
Rueda guía (dos pernos) (1)
Rueda guía (dos pernos) (1)
Número de pieza del conjunto de tapa anterior
213-1745
131-1644
131-1645
131-1646
Número de pieza del nuevo conjunto de tapa
Adaptable a los números de serie de máquina
306-9435
D11N (N/S: 4HK1-Y SIG.; 74Z1-Y SIG.) D11R (N/S: 7PZ1652-Y SIG.; AAF289-Y SIG.; 8ZR1-Y SIG.; 9TR1-Y SIG.; 9XR1-Y SIG.)
306-9441
D8L (N/S: 4FB1-Y SIG.; 7YB1-Y SIG.; 7JC1-Y SIG.; 53Y1-Y SIG.) D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8R serie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) 578 (N/S: 8HB1-Y SIG.)
306-9437
D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8R serie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) 583T (N/S: CMX1-246) 587R (N/S: BXL1-253) 587T (N/S: FAT1-328)
306-9439
D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8R serie II (N/S: AKA1-Y
587T
(1)
SIG.; 6YZ1-Y SIG.) 583T (N/S: CMX1-246) 587R (N/S: BXL1-253) 587T (N/S: FAT1-328)
Sólo para tren de rodaje no suspendidos
Soporte mejorado para el rodillo superior SMCS - 4154-S4
Tractores de Cadenas: D8R (N/S: 9EM2498-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) Service Magazine SSPD0886, 30 Abril 2007, "Soporte mejorado para el rodillo superior". No tenga en cuenta este artículo. Consulte el artículo de reemplazo siguiente. Description of Change: Se usa ahora un soporte mejorado para el rodillo superior en los Tractores de Cadenas D8R y D8T. El soporte de rodillo superior ha cambiado de un soporte de una pieza a un soporte de dos piezas. El nuevo soporte mejorará el acceso para quitar el barro y los residuos compactados bajo el rodillo superior y alrededores. Adaptable To: El nuevo Soporte de rodillo 287-3293 de dos piezas se puede usar para reemplazar el Soporte de rodillo 192-2577 anterior de una pieza. Puede modificar el Soporte de rodillo 192-2577 anterior para cambiarlo de una pieza a dos piezas en lugar de instalar el nuevo Soporte de rodillo 287-3293 de dos piezas. El soporte de rodillo mejorado se puede adaptar a las siguientes máquinas: • •
D8R (N/S: 9EM2498-3456) D8T (N/S: J8B1-1105; KPZ1-1916)
El soporte de rodillo mejorado está vigente con las siguientes máquinas: • •
D8R (N/S: 9EM3457-Y SIG.) D8T (N/S: J8B1106-Y SIG.; KPZ1917-Y SIG.)
Para adaptar su máquina al soporte de rodillo mejorado, debe pedir las piezas que se muestran en la Tabla 1. Nota: Las piezas de la Tabla 1 sirven para convertir un bastidor de rodillos inferiores. Tabla 1
Piezas necesarias Artículo
No. de pieza
Descripción
Cantidad
7
287-3293
Soporte de rodillo
2
8
7X-0408
Perno
4
Siga los procedimientos siguientes para instalar el nuevo Soporte de rodillo 287-3293 de dos piezas en su máquina. 1. Destense la cadena abriendo la válvula de tensado de la cadena. Consulte el Manual de Operación y Mantenimiento, "Cadena - Comprobar/Ajustar" para obtener información adicional. Ver imagen
Ilustración 1
g01373005
2. Levante la cadena con una grúa y un dispositivo de levantamiento apropiado. Así se abrirá espacio entre el rodillo superior (1) y la cadena (2) . Ver imagen
Ilustración 2
g01372955
3. Quite los cuatro pernos de tapa (3), las dos tapas (4) y el rodillo superior (1) . 4. Quite los cuatro pernos (6) del soporte del rodillo (5). Quite el soporte del rodillo (5) . Ver imagen
Ilustración 3
g01372692
5. Arme dos nuevos soportes de rodillo (7) en el bastidor de rodillos inferiores con los cuatro pernos (8). Apriete bien los cuatro pernos (8) . Ver imagen
Ilustración 4
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6. Arme el rodillo superior (1) en los soportes del rodillo (7) . Ver imagen
Ilustración 5
g01372802
7. Arme las dos tapas de rodillo inferior (4) en el soporte del rodillo (7) con los cuatro pernos (3). Apriete bien los cuatro pernos (3). Empiece por el perno (3) del lado del tope (9) de la tapa de rodillo inferior (4) . 8. Apriete los cuatro pernos (8) del soporte de montaje (7) con un par de 900 ± 100 N·m (650 ± 75 lbpie). 9. Apriete los cuatro pernos (3) con un par de 750 ± 70 N·m (550 ± 50 lb-pie). Apriete primero los pernos (3) del lado del tope (9) .
10. Suelte la cadena y ajuste la tensión de la cadena. Consulte el Manual de Operación y Mantenimiento, "Cadena - Comprobar/Ajustar" para obtener información adicional. 11. Complete los pasos del 1 al 11 para el otro lado de la máquina. Siga los siguientes procedimientos para modificar el soporte existente. Ver imagen
Ilustración 6
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Soporte de rodillo antes del corte Ver imagen
Ilustración 7 Soporte de rodillo después del corte (3) Superficies de montaje del soporte Ver imagen
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Ilustración 8
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Soporte de rodillo desde la parte delantera después del corte (3) Superficies de montaje del soporte
Las herramientas necesarias son las siguientes: • •
Soplete de corte a llama Esmeriladora de disco
1. Destense la cadena abriendo la válvula de tensado de la cadena. Consulte el Manual de Operación y Mantenimiento, "Cadena - Comprobar/Ajustar" para obtener información adicional. 2. Levante la cadena con una grúa y un dispositivo apropiado de levantamiento. Así se abrirá el espacio entre el rodillo superior (1) y la cadena. 3. Quite los cuatro pernos de tapa y el rodillo superior (1) del soporte de rodillo (2) . 4. Quite cuatro pernos del soporte de rodillo (2). Luego quite el soporte de rodillo (2) . 5. Marque el soporte de rodillo (2) y use un soplete de corte a llama para quitar la barra que hay entre los pedestales de soporte. Tenga cuidado para no quitar el material que está directamente sobre las superficie de montaje del soporte (3). Use una esmeriladora de disco para alisar el borde del corte. 6. Arme los dos pedestales de soporte en el bastidor de rodillos inferiores. Apriete bien los pernos de montaje, pero no completamente a su par. 7. Arme el rodillos superior (1) en los soportes de rodillo (2) . 8. Instale las dos Tapas de rodillo de cadena 6T-1142 con cuatro Pernos 6T-1140. Comience primero por el lado del tope y deje los pernos de tapa apretados, pero no completamente a su par. 9. Apriete los cuatro Pernos 7X-0406 de los soportes de montaje con un par de 900 ± 100 N·m (663 ± 74 lb-pie). 10. Comience primero por el lado del tope y apriete los cuatro Pernos 6T-1140 con un par de 750 ± 70 N·m (553 ± 52 lb-pie).
11. Suelte la cadena y ajuste la tensión de la cadena. Consulte el Manual de Operación y Mantenimiento, "Cadena - Comprobar/Ajustar" para obtener información adicional. 12. Complete los pasos del 1 al 11 para el rodillo superior (1) del otro lado del tractor.
Cambios en el bastidor de rodillos inferiores en los Tractores SMCS - 4151; 4158; 4192; 7169
Tractor de Cadenas: D8R (N/S: 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) Service Magazine, SSPD1032, 6 noviembre 2009, "Cambios en el bastidor de rodillos inferiores en los Tractores de Cadenas D8R y D8T: Orificio del eje pivote de comba solo; protectores de rueda guía de la cadena; soportes basculantes grandes para SystemOne; resorte tensor y tubo de tope". Haga caso omiso de este artículo. Consulte el artículo de reemplazo siguiente. Description of Change: Se han hecho cambios en los bastidores de rodillos inferiores traseros, los protectores de rueda guía de la cadena, los soportes basculantes grandes y el resorte tensor y el tubo de tope.
Bastidores traseros de los rodillos inferiores Ver imagen
Ilustración 1
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Los bastidores de rueda motriz traseros con orificios para eje pivote con comba solamente ahora son estándar en los tractores que se envían desde fábrica. Los orificios del eje pivote están levemente inclinados para compensar la deformación hacia arriba del eje pivote bajo carga. Sin comba, las cadenas pueden desplazarse hacia fuera del tractor. Gracias a la comba, las cadenas pasan mejor por entre los rebordes de los rodillos y las guías de las cadenas, lo que permite un menor desgaste externo. Los bastidores traseros de los rodillos inferiores con comba solo se identifican por tener dos agujeros taladrados en el lado externo de los patines de la cadena, como se muestra en la Ilustración 1.
Protectores de rueda guía de la cadena Ver imagen
Ilustración 2
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Perno trasero antiguo en los protectores y raspadores de caucho Ver imagen
Ilustración 3
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Nuevo protector de rueda guía trasera con placa soldada
El perno antiguo en los protectores de rueda motriz trasera y los protectores de raspadores de caucho flexibles se han cambiado a placas soldadas. Refiérase a las ilustraciones 2 y 3.
Ver imagen
Ilustración 4
g02023267
Rascadores de caucho delanteros antiguos Ver imagen
Ilustración 5
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Nuevo protector de rueda guía delantera con placa soldada
Los protectores de raspadores flexibles antiguos para la rueda guía delantera ya no se usan. El protector delantero ahora es una placa soldada. Refiérase a las ilustraciones 4 y 5.
Soportes basculantes grandes Ver imagen
Ilustración 6
g02023269
Soporte basculante grande del tren de rodaje estándar con una rueda guía convencional Ver imagen
g02023272
Ilustración 7
Soporte basculante grande del tren de rodaje SystemOne con una Rueda guía con banda de rodadura central (CTI) y perno en el protector inferior para resistir la adherencia de materiales. Ver imagen
Ilustración 8
g02023273
Soporte basculante grande del tren de rodaje SystemOne con una rueda guía convencional y placa de cubierta
Se usan los nuevos bastidores de soportes basculantes grandes trasero y delantero compatible sólo con la cadena SystemOne Los nuevos bastidores de soportes basculantes colocan el eje de la rueda guía en la posición correcta para usar con la cadena SystemOne. Los bastidores también aceptan pernos en los protectores de rueda guía inferior para reducir el flujo de material y la adherencia de materiales en la cadena en la CTI. El perno en los protectores inferiores no pueden usarse con ruedas guías convencionales. Las ruedas guía convencionales se usan con los soportes basculantes grandes SystemOne en medio ambientes de mucha adherencia de materiales para reducir al mínimo la adherencia en el sistema de resorte tensor. Las ruedas guia convencionales también se usan con los soportes basculantes grandes de SystemOne para reducir las emisiones de ruido del tren de rodaje.
Resorte tensor y tubo de tope Ver imagen
g02023274
Ilustración 9 (1) Tubo de tope (2) Resorte tensor
El sistema de resorte tensor y de ajustador de cadena utiliza ahora un resorte y un tubo de tope más grandes para proporcionar 12 mm (0,472 pulg) más de desplazamiento del resorte tensor. El nuevo resorte y tubo de tope deben usarse siempre juntos como un conjunto. Lo mismo aplica para el resorte y tubo de tope anteriores. No mezcle las piezas nuevas y las anteriores Adaptable To: Los cambios en los bastidores de rodillos inferiores, protectores de rueda guía y soportes basculantes grandes están vigentes con las siguientes máquinas: • •
D8R (N/S: 9EM5225-Y SIG.) D8T (N/S: J8B2206-Y SIG.; KPZ3500-Y SIG.)
Los cambios en los bastidores de rodillos inferiores traseros, los protectores de rueda motriz y los soportes basculantes grandes son adaptables a las máquinas siguientes: • •
D8R (N/S: 9EM1-5224) D8T (N/S: J8B1-2205; KPZ1-3499) Tabla 1 Bastidor trasero de rodillos inferiores
Número de pieza nuevo
Número de pieza anterior 237-8210
310-2888 310-2872 237-8211 310-2889 310-2873
Descripción Conjunto de bastidor de rodillos inferiores del lado derecho (Tren de rodaje estándar) Conjunto de bastidor de rodillos inferiores del lado izquierdo (Tren de rodaje estándar)
310-2886
310-2870
Conjunto de bastidor de rodillos inferiores del lado derecho (Tren de rodaje SystemOne)
310-2887
310-2871
Conjunto de bastidor de rodillos inferiores del lado izquierdo (Tren de rodaje SystemOne) Tabla 2 Soportes basculantes grandes del D8
Tren de rodaje del D8 estándar
D8 SystemOne de fábrica
D8 SystemOne modificado
Descripción
9W-7417 (1)
9W-7417 (1)
Bastidor de soporte basculante grande delantero
310-2905 310-2901
(2)
310-2901
9W-7416 (1)
(2)
9W-7416 (1)
Bastidor de soporte basculante grande trasero
310-2906 310-2902 (2) (1) (2)
310-2902 (2)
Usa pernos de montaje de taco de soporte basculante de 7/16 pulg. Usa pernos de montaje de taco de soporte basculante de 1/2 pulg.
Tabla 3 Protectores inferiores CTI de SystemOne del D8T Número de pieza
Descripción
Notas
310-2910
Protector de rueda guía (INFERIOR, EXTERIOR)
Grupo de protector exterior es parte del accesorio de SystemOne
310-2911
Protector de rueda guía (INFERIOR, INTERIOR)
El grupo de protector interior es un accesorio separado
310-2909
Plancha
8T-4994
Arandela dura
8T-9398
Perno
Placa de la tapa y la tornillería para proteger los orificios roscados en el soporte basculante grande si los protectores no se usan.
Los cambios del resorte tensor y del tubo de tope están vigentes con las siguientes máquinas: • •
D8R (N/S: 9EM5250-Y SIG.) D8T (N/S: J8B2214-Y SIG.; KPZ2780-Y SIG.) Tabla 4 Resorte tensor y tubo de tope
Número de pieza nuevo
Número de pieza anterior
Descripción
314-7924
199-8187
Tubo
314-7925
199-8186
Resorte
GRAFICO #1 g01875133
D8T TRACK-TYPE TRACTOR, Powered By C15 Engine Número de medio - SEBP3654-61 | Fecha de publicación 01/10/2010 | Fecha de actualización - 05/10/2010 i03462094
310-2850 UNDERCARRIAGE AR S/N KPZ3500-UP PART OF 325-4743 GENERAL AR
GRUPO ENTERO Ref. Cant. NPR Nota
No. de pieza
Nombre de la pieza
Grp
310-2850
UNDERCARRIAGE AR
NPR
PIEZAS INDIVIDUALES Ref. Cant. NPR Nota
No. de pieza
Cant. Nombre de la pieza req.
1
NPR Y
6T-1142
32
CAP GP-TRACK ROLLER
2
NPR Y
7T-2540
1
SUSPENSION GP-BOGIE
3
NPR CY
337-6877
2
TRACK GP (24-IN)
4
NPR Y
9W-4477
8
CAP GP-TRACK IDLER
5
NPR Y
111-1729
2
IDLER GP-TRACK (REAR)
6
NPR Y
111-1730
2
IDLER GP-TRACK (FRONT)
7
NPR Y
220-0211
1
BAR GP-EQUALIZER
8
NPR RY
246-0775
8
ROLLER GP-TRACK-SINGLE FLANGE (SYSTEMONE)
10R-2499
1
R
ROLLER GP-TRACK
9
NPR Y
246-0779
8
ROLLER GP-TRACK-DOUBLE FLANGE (SYSTEMONE)
10
NPR Y
310-2851
1
FRAME GP-TELESCOPING RECOIL
11
NPR Y
310-2920
1
TRACK ADJUSTER & RECOIL GP
12
NPR CY
314-5464
2
SEGMENT GP-SPROCKET
Abreviaturas: C - CHANGE FROM PREVIOUS TYPE R - REMFG PART MAY BE AVAILABLE Y - SEPARATE ILLUSTRATION
Cambios en los rodillos inferiores y la guía de cadena SMCS - 4150; 4177; 4180
Tiendetubos: 578 (N/S: 8HB1-Y SIG.) Tractor de cadenas: D8L (N/S: 4FB1-Y SIG.; 7YB1-Y SIG.; 7JC1-Y SIG.; 53Y1-Y SIG.) D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8Rserie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) ReferenciaInstrucción Especial, REHS4336, "Descripción de características, información de servicio e identificación de piezas para el tren de Rodaje SystemOne del D8" ReferenciaInstrucción Especial, REHS3373, "Conversión de los D8N, D8R y D8T al sistema de tren de rodaje SystemOne" ReferenciaNoticiero IRM, PELJ0711, "Nuevos grupos de rodillos inferiores y guías de cadena del D8T" Description of Change: Nuevos grupos de rodillos inferiores y guías de cadena para el tren de rodaje del tamaño del D8 vieron la luz anteriormente en el 2006. Los nuevos rodillos tienen 7 mm (0,276 pulg) más de ancho entre las pestañas. Con este cambio, y para proporcionar espacio libre apropiado a los eslabones, se redujo el ancho a las guías de cadena en 3,5 mm (0,138 pulg).
Los nuevos rodillos y las guías deben instalarse juntos para proporcionar mejor espacio libre de operación entre el conjunto de eslabón y las guías de cadena. La mezcla de las guías anteriores con los nuevos rodillos puede causar desgaste excesivo en los eslabones y extremos de pasador. El desgaste puede ser más notorio en la cadena SystemOne del D8 y puede crear agrietamiento en el eslabón. El número de pieza de la guía de cadenas de D8 y 578 anterior todavía se usa en el tren de rodaje de los D9, 583 y 587 puede usarse comúnmente en las reconstrucciones de bastidor de los rodillos inferiores. Aunque la guía de cadenas anterior se ajusta al bastidor de rodillos inferiores del D8, no use la guía anterior del D8 con los nuevos rodillos D8 debido a los problemas de espacio libre indicados arriba. Ver imagen
Ilustración 1
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(1) Rodillo inferior (2) Guía de cadena (3) Conjunto de eslabones de cadena (A) Nuevo rodillo de 240 mm (9,45 pulg) (B) Rodillo anterior de 233 mm (9,17 pulg) (C) Nueva guía 41,5 mm (1,63 pulg) (D) Guía anterior 45,0 mm (1,77 pulg)
Adaptable To: Los nuevos grupos de rodillos y las guías de cadena son un reemplazo directo de los grupos de rodillos y guías de cadena anteriores. Los nuevos rodillos y las guías deben instalarse como un conjunto completo. Los nuevos grupos de rodillo y las guías de cadena están vigentes en producción con las siguientes máquinas construidas en fábrica: • •
D8T (N/S: J8B734-Y SIG.; KPZ1290-Y SIG.) D8R (N/S: 9EM2919-Y SIG.) Tabla 1 Guías de las bandas de goma
No. de pieza anterior
No. de pieza nuevo
Descripción
Cant.
184-4395
248-2987
Guía
16
8C-6857
8T-8924
Perno
32
8T-4994
8T-4994
Arandela dura
32
Tabla 2 Grupos de rodillos inferiores No. de pieza anterior
No. de pieza nuevo
196-9946
246-0779
Rodillo inferior de pestaña doble
196-9947
246-0775
Rodillo inferior de pestaña simple
244-0881
278-9540
Grupo de rodillo inferior con pestaña doble (Ártico)
244-0880
278-9539
Grupo de rodillo inferior con pestaña simple (Ártico)
244-0943
278-9541
Grupo de rodillo inferior de pestaña doble (Alta temperatura)
244-0942
278-9538
Grupo de rodillo inferior de pestaña simple (Alta temperatura)
Descripción
Tabla 3 Conjuntos de cojinetes y rodillos inferiores No. de pieza anterior
No. de pieza nuevo
196-9948
246-0780
196-9949
284-5456
Descripción Conjunto de cojinetes y rodillos inferiores (Pestaña doble) Conjuntos de cojinetes y rodillos inferiores (Pestaña simple)
Herramientas para Tractores D8 con tren de rodaje SystemOne SMCS - 0729; 4150
Tractores de Cadenas: D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8Rserie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) Se dispone de nuevas herramientas para los Tractores D8 equipados con un tren de rodaje SystemOne. Será necesaria una prensa para cadenas de paso múltiple para efectuar el servicio en la obra en los Tractores D8 con un tren de rodaje SystemOne. Los eslabones maestros serrados serán la opción estándar para un tren de rodaje SystemOne en los Tractores D8. La herramienta de paso múltiple no será necesaria para instalar un tren de rodaje SystemOne en su máquina. Si su distribuidor tiene un tren de rodaje SystemOne es posible que tenga algunas de las herramientas requeridas. Verifique los números de pieza indicados en la Tabla 1 antes de pedir cualquier herramienta. Ver imagen
Ilustración 1
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Herramientas para conectar la cadena SystemOne Ver imagen
Ilustración 2 Herramientas para quitar el eslabón exterior
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Ver imagen
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Ilustración 3 Herramientas para quitar el eslabón interior
Tabla 1 Lista de herramientas completa para D8 SystemOne Artículo
No. de pieza
Descripción
Cantidad
1
304-5688
Conjunto de eslabón
2
2
272-6559
Placa (superior)
3
264-5774
4
265-8989
Tuerca
5
264-5768
Placa
2
6
264-5770
Placa extractora
1
7
264-5777
Bloque
2
8
289-5146
Placa de contacto (instalar)
9
8H-3127
Perno
10
265-8035
Cilindro hidráulico (75 toneladas)
11
272-1505
Placa de contacto (quitar)
(1)
2
Prisionero
4
(2)
(2)
12
(1)
(1)
4 4
(1)
1 2
(1)
12
273-8788
Placa espaciadora (quitar)
13
4L-7124
Perno
2
14
268-7901
Calce
2
279-0092
Espaciador
0S-1615
Perno
1
5P-8249
Arandela
8
264-5776
Protector
1
264-5772
Fleje de retención
2J-5245
Perno
5M-2894
Arandela
9S-8752
Tuerca
3S-6224
Bomba hidráulica (eléctrica)
1
4C-5599
Compuesto antiagarrotante
1
(1)
1
6
(3)
(3)
2 2
(3)
(3)
4 2
(1)
Nuevos números de pieza y herramientas adicionales para D8 Rosca ACME (3) Piezas del protector (2)
Descripción de características, información SMCS - 4150
Tractores de Cadenas: D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8Rserie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) ReferenciaConsulte la Instrucción Especial, REHS4336, "Descripción de características, servicio de información e identificación de partes para el Tren de Rodaje SystemOne D8" para obtener información acerca del tren de rodaje SystemOne de los Tractores de Cadenas D8N, D8R, D8R serie II y D8T. La Instrucción Especial indicada anteriormente contiene la siguiente información acerca del Tren de Rodaje SystemOne D8:
• • • • • • • • • • •
Conjunto de cartucho SystemOne de Caterpillar con un buje giratorio Eslabones maestros serrados Segmentos de acero resistentes con siete pernos Diseño de eslabón y Rueda Guía de Banda de Rodadura Central (CTI) resistente al desgaste por la torsión lateral axial Fácil modernización de las máquinas D8N, D8R y D8T Posicionamiento de la rueda guía SystemOne D8 Ajuste de cadena para tren de rodaje SystemOne D8 Piezas de repuesto reemplazables para la cadena SystemOne D8 Expectativas de vida útil de la cadena y del sistema SystemOne D8 Preinclinación del SystemOne D8 Tablas de desgaste de los componentes de tren de rodaje para cadenas SystemOne D8
Nota: El tren de rodaje SystemOne D8 no recomendado para configuraciones de tren de rodaje no suspendido. Actualmente, la configuración de amortiguación de los bastidores de cadena no suspendidos no permite tanto desplazamiento de amortiguación como el de los bastidores de rodillos de cadena suspendidos. Esto limita la capacidad del sistema de tren de rodaje para adaptarse a los efectos del conjunto de caja de eslabones, lo que puede producir la avería prematura de los sellos debido a la entrada de material a su alrededor. Además, no hay un conjunto de protección disponible para evitar la entrada de material alrededor de las ruedas guía.
Description of Features, Service Information and Parts Identification for D8 SystemOne Undercarriage{4150} SMCS - 4150
Track-Type Tractor: D8N (S/N: 9TC1-UP; 1XJ1-UP; 5TJ1-UP; 7TK1-UP) D8R Series II (S/N: AKA1-UP; 6YZ1-UP) D8R (S/N: 7XM1-UP; 9EM1-UP) D8T (S/N: J8B1-UP; KPZ1-UP)
Introduction Note: D8 SystemOne undercarriage is available from the factory on new machines as an optional attachment Note: Effective with the dates that D8 SystemOne undercarriage becomes available, Non-Positive Pin Retention (Non-PPR) link assemblies will no longer be available from the factory on new D8 machines. Instead Positive Pin Retention (PPR) track will be standard, and SystemOne will be optional. Replacement Non-PPR track will continue to be available through the Parts Distribution System.
Note: SystemOne undercarriage will be available for the D8R and D8T for European Union (EU) countries on the effective target date from Cat Brazil Ltd with conventional idlers only. SystemOne undercarriage for the D8T, D8R, and D8N is designed to extend undercarriage system life beyond that of PPR track and Non-PPR track in abrasive applications. The rotating bushing design in SystemOne track eliminates the need for a mid-life bushing turn as typically performed on PPR or nonPPR track. SystemOne track may be used with either conventional idlers or Center Tread Idlers (CTI). Link rail wear is reduced with the use of CTI's due to the fact that the CTI never contacts the link rail surface. Additionally, the CTI design reduces link scallop, a common source of operator discomfort. The narrow profile of the CTI allows for improved guarding that effectively keeps abrasive material from entering the track system. SystemOne is not recommended for waste handling applications, LGP applications, hard bottom (non-suspended) configurations, or in heavy packing applications such as caliche or hard clay. The design of D8 SystemOne overcomes the effects of outward thrust wear which is common to all TrackType Tractors. This is accomplished by the addition of hardened wear material to the inner links and to the sides of the CTI. Additionally, when purchased from the factory on new machines, cambered track roller frames will be standard. The addition of camber further eliminates the effects of outward thrust of the tracks and allows the full utilization of available wear material on the link, roller, and CTI. See ""Track Life and System Life Expectations for D8 SystemOne" " for information on track and system life expectations. See ""Camber for D8 SystemOne" " for details of camber for the D8 SystemOne. Note: Do not perform any procedure that is outlined in this publication until you have read the information and you understand the information. Do not order parts until you read the information and you understand the information.
Do not attempt to disassemble or assemble this machine until you read and understand the disassembly and assembly instructions. Improper disassembly and assembly procedures could result in injury or death.
Accidental engine starting can cause injury or death to personnel working on the equipment. To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system. Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on.
The machine must be on a level, hard surface before a separation of the track is made. Any time a separation of both tracks is made, the machine must have blocks correctly positioned so the machine will not move.
Keep away from the front of the machine when the track is pushed off the final drive. A minimum distance of 7.6 m (25 ft) is needed in front of the track to permit the track to move out onto the floor.
ReferenceRefer to the appropriate Disassembly and Assembly manual for your machine.
Features of D8 SystemOne Caterpillar SystemOne Cartridge Assembly with a Rotating Bushing Ver imagen
Illustration 1
(1) Collar (2) Rotating Bushing
g01449901
(3) Insert (4) Seals (5) Pin • • • • • • •
The SystemOne rotating bushing design provides longer bushing life and eliminates the need for pin and bushing turns. SystemOne bushings rotate upon entering sprocket segments, eliminating the sliding wear that typically occurs in the reverse drive cycle with conventional track. All four seal lip contact surfaces within the SystemOne cartridge are treated with Caterpillar's unique Advanced Surface Technology which is a hard-face coating proven to extend leak free seal life. The cartridge is lifetime filled with Caterpillar premium synthetic 75W-140 track oil. Seal design within the cartridge has been optimized by the addition of an increased volume of seal material that allows for extended service life. The cartridge collars are precision welded to the center pin to control joint end-play throughout the life of the track. The cartridge is not a serviceable part. (See ""Serviceable Replacement parts for D8 SystemOne Track" " for a list of the serviceable replacement parts for the D8 SystemOne track.)
Serrated Master Links Ver imagen
Illustration 2
g01449945
(6) 321-2018 Link Assembly Comprised of an inner link box and the non-threaded master link half. (7) 321-2019 Link Assembly Comprised of an inner link box and the threaded master link half. (8) Inner link (9) Outer link • •
D8 SystemOne is the first model of SystemOne undercarriage to offer the popular serrated tooth style of master links for ease of track separation and track connection. D8 SystemOne serrated tooth master links are serviced as a link box, meaning the serrated master link halves are only available from the factory assembled to inner links. Installation requires that this assembly must be assembled to the outer links in the SystemOne track. Refer to Illustration 2.
Ver imagen
Illustration 3
g01450013
(6) 321-2018 Link Assembly (7) 321-2019 Link Assembly
Since it is possible to install the individual master link box in the wrong orientation, please note the following procedure for the correct installation: •
•
321-2018 Link Assembly : The serrated links in this section have through holes without threads. Consider the serrated links in this section similar to the bushing end master link in standard track. The majority of the track shoe makes contact with the serrated link on this assembly. Refer to Illustration 3. 321-2019 Link Assembly : The serrated links in this section contain the threads for the bolts. Consider the serrated links in this section similar to the pin end master link in standard track. The shoe grouser is over the bore for the cartridge on this assembly. Refer to Illustration 3.
Note: The bolt hole pattern on the master link shoe for the D8 SystemOne has a different bolt hole pattern than standard D8 SystemOne shoes. The bolt hole pattern on the master link shoe is wider than the bolt hole pattern on standard shoe. Also, the master link shoe is the only shoe on the D8 SystemOne track that has clipped grousers.
Ver imagen
Illustration 4
g01748834
(A) Bolt hole width on standard track shoe 173.5 mm (6.8 inch) (B) Bolt hole width on master track shoe 200 mm (7.9 inch)
Tough Steel Segments With Seven Bolts Ver imagen
Illustration 5
g01451084
(10) Tough steel segments with seven bolts • •
•
New segments with seven bolts eliminate the problem of segment bolt loosening on D8 SystemOne undercarriage. D8 SystemOne sprocket segments incorporate the latest design which utilizes added material on the ends of the segment in order to allow close tolerance machining. This allows the segments to make contact or to bridge under a load, thus sharing the load and resisting bolt loosening. The design for the rotating bushing on D8 SystemOne results in a lower wear rate for the segment. In most applications this allows for reuse of the segments for a second undercarriage track life. The longer available
• • •
service life with the D8 SystemOne segments generated the need for extended segment retention capability which was the basis for the seven bolt design. Instructions to retro-fit existing D8N, D8R, and D8T final drive hubs for use of seven bolt segments for conversion to D8 SystemOne are included in Special Instruction, REHS3373. Torque plus turn is required to attain maximum bolted joint life. Tighten the bolts to a torque of 300 ± 50 N·m (220 ± 37 lb ft). Tighten the bolts an additional 1/3 turn. The hardened washer should be placed under the bolt head and against the final drive hub.
Note: The link pitch for the undercarriage for D8 SystemOne is 2.1 mm (0.083 inch) longer than the link pitch for standard D8N, D8R, and D8T track, so the correct sprocket segments must be used for D8 SystemOne. The pitch length can be described as the center to center distance between the link pin bores. The part number for D8 SystemOne segments is 278-2375 Sprocket Segment . Link and CTI Design that Resists Thrust Bias Wear Ver imagen
Illustration 6
g01451076
(11) New design for the inner link with additional wear surface on the side
Ver imagen
Illustration 7
g01451245
(12) D8 SystemOne link with the original design (13) D8 SystemOne center tread idler with the original design (14) D8 SystemOne center tread idler with the new design. (15) D8 SystemOne link with the new design (16) Thrust wing • •
• • •
•
• • • • • •
Field follow of early D8 SystemOne track in applications that are wet and highly abrasive indicated that thrust bias wear could result in dry joints. Thrust bias wear is wear to the inner link caused by contact with the center tread idler and the sides of the sprocket segments. This contact is caused by the outward thrust of the link assemblies occurring when the weight of the machine combines with the force of the final drive pulling up on the track as it wraps around the rear idler in FORWARD drive under load. Third body abrasive material between the inner link and the CTI accelerates this wear. When inner link wear becomes excessive, the inner seal can become exposed resulting in seal damage, oil loss in the cartridge, and joint failure. A redesign was completed on track links and center tread idlers that added additional hardened wear material to the contact surfaces of the links and the CTI. Refer to Illustration 6 and Illustration 7. The additional wear material on links and center tread idlers will eliminate exposure to the inner seal for the life of the track in most applications. In order to gauge the risk of inner seal wear of the link cartridge, the CTI thrust wings should be monitored. Refer to Illustration 7. In applications with extreme sand and water, consistent side slope operation, or on LGP models, the thrust wings on the inner sides of the idler may wear. If at track replacement time the thrust wings of the CTI are worn sufficiently from the inner side of the idler, the idler may be rotated 180 degrees for continued use. To do so rotate the CTI so that the unworn idler thrust wing toward the outside of the machine is installed toward the inside of the machine. A common wear pattern for the CTI is dimpling or indentation on the bushing contact surface. This wear pattern does not affect the functionality of the CTI and can be expected. CTI life is determined by three variables: Thrust wing wear, 120% tread wear and Wear life of the Duo-Cone seal assemblies A CTI is not reusable when both wings are worn away, 120% tread wear is reached, or Duo-Cone seal life is reached. Complete Custom Track Service (CTS) wear charts are available for the CTI and other D8 SystemOne components. Refer to ""Wear Charts for D8 SystemOne Undercarriage Components" " for the wear charts. The CTI for D8 SystemOne have internal components that are common to the conventional D8 idlers and follow the same rebuild guidelines. Pre-production use of CTIs on D8 SystemOne track showed idler tread wear life equal to two sets of track in most applications.
Note: The D8 has two different idler diameters, with the larger diameter idler positioned at the front of the machine and the smaller diameter idler at the rear of the machine.
Easy Retro-Fit to D8N, D8R, and D8T Machines •
• •
A complete 316-8674 Idler Guarding Kit is available. This kit contains a complete set of parts for use with all D8 machines with a conventional suspended undercarriage. This idler guarding kit does an excellent job of preventing the entry of material around both front and rear idlers. 307-0761 Idler Fastener Group contains all of the hardware for shimming the conventional suspended undercarriage. Refer to Special Instruction, REHS3373 for complete instructions on conversion and the installation of guarding.
Note: D8 SystemOne undercarriage is not recommended for waste handling applications. Note: D8 SystemOne undercarriage is not recommended for LGP applications. Note: D8 SystemOne undercarriage is not recommended for hard-bottom (non-suspended) undercarriage configurations. At this time the recoil arrangement found in the hardbottom track frames does not allow as much recoil travel as that found in the suspended track roller frames. This limits the ability of the undercarriage system to accommodate the effects of link box packing which can potentially lead to premature seal failure due to material ingestion around the seals. Additionally, there is no guarding package available to prevent material ingestion around the idlers. D8 SystemOne Idler Positioning
Correct idler rise height ensures a smooth ride and also provides for accurate fine dozing capability. •
•
For conversion of D8N, D8R, or D8T machines from a conventional suspended undercarriage to SystemOne undercarriage, the 307-0761 Idler Fastener Gp provides idler block spacers and bogie shims to maintain correct idler rise height throughout system life. Refer to Special Instruction, REHS3373, "Converting D8N, D8R, and D8T To SystemOne Undercarriage", page 18, Illustration 41. D8 SystemOne undercarriage ordered as optional equipment on new machines from the factory will be equipped with new front and rear major bogie arms that will correctly position the CTI without the use of the idler block spacers.
Track Adjustment for D8 SystemOne Undercarriage
Upon installation of the D8 SystemOne undercarriage, track tension should be adjusted and maintained to the same tolerance as the D8 standard fixed bushing track. Table 1 Track Tension Application
Normal operation
With Out Carrier Roller
With Carrier Roller
115 ± 10 mm (4.5 ± 0.4 inch)
65 ± 10 mm (2.6 ± 0.4 inch)
Moderate tendency for sprocket jumping
Severe tendency for sprocket jumping
100 ± 10 mm (3.9 ± 0.4 inch)
60 ± 10 mm (2.4 ± 0.4 inch)
90 ± 10 mm (3.5 ± 0.4 inch)
55 ± 10 mm (2.2 ± 0.4 inch)
Note: In applications with moderate to heavy packing, track tension should be monitored after initial operation to be sure the track tension is maintained within guidelines. Note: Center Tread Idlers are not recommended for heavy packing environments. Conventional Idlers are recommended for heavy packing environments. Note: D8 SystemOne should never be operated with a track sag of less than 80 mm (3.1 inch) as overheating may occur which could damage the seals. Serviceable Replacement parts for D8 SystemOne Track Ver imagen
Illustration 8
(9) Outer link
Ver imagen
g01749196
Illustration 9
g01749198
(8) Inner link • • • • • • • • •
• • •
The outer link, part number 304-5680. Refer to Illustration 8. The inner link box, part number 318-5033. This contains two inner links that are assembled to two cartridge assemblies. Refer to Illustration 9. The link assembly, part number 304-5688. This contains 44 joints of assembled SystemOne track and includes serrated master links. The serrated master link part numbers are 321-2018 and 321-2019. Refer to ""Serrated Master Links" " for the features of the serrated master link. Master link bolts (four per link assembly), part number 6V-1725. This is the same part as the long master link bolts in the conventional D8 fixed bushing track. The seven bolt sprocket segments for D8 SystemOne is 278-2375. Refer to ""Tough Steel Segments With Seven Bolts" " for the features of the seven bolt sprocket segments. Segment bolts, part number 5P-7665 ; hard washers, part number 6V-5841 ; and nuts, part number 7H3608 Track rollers used for the D8 SystemOne are the standard D8N, D8R, and D8T single flange rollers, part number 246-0775. All rollers used with the D8 SystemOne are single flange rollers. Track guides for the D8 SystemOne are the same as used on conventional fixed bushing track, part number 248-2987. Bolts for track guides are part number 8T-8924 and washers for the track guide bolts are part number 8T-4994 . Standard CTIs for the D8 SystemOne are 308-4364 Track Idler Gp for the front and 308-4365 Track Idler Gp for the rear. All Track Groups made to order (MTO), Track Shoes, CTI Guarding Kit, Idler Fastener Kit, and associated hardware are listed and described in Special Instruction, REHS3373. The standard Multi-Pitch Tool is updated with attachments for use on D8 SystemOne undercarriage. Refer to Service Magazine, SEPD0936, "Tooling for Machines with D8 SystemOne Undercarriage " for the complete tool list for the Standard Multi-Pitch Tool. Refer to Special Instruction, REHS2403, "Installation and Removal of SystemOne Track with the Multi-Pitch Track Press" for instructions for using the Multi-Pitch Tool. Refer to Undercarriage Reconditioning Bulletin, SEBF9100, "Field Repair of SystemOne Track with the Multi-Pitch Track Press" for instructions regarding field repair of D8 SystemOne track using the Multi-Pitch tool.
Track Life and System Life Expectations for D8 SystemOne • • •
• • • • • • •
•
The design of the D8 SystemOne undercarriage wear life will allow for the reuse of the original CTIs and sprocket segments throughout a second set of tracks in most applications. Replacement of CTI duo cone seals is recommended every 6000 hours. All rollers on the D8 SystemOne are single flange rollers. Since D8 single flange rollers are 6 mm (0.236 inch) larger in diameter than double flange rollers, maximum roller tread diameter is utilized throughout the roller system. It is common for the D8 SystemOne rollers to run in a 1:1 ratio with the D8 SystemOne track. D8 SystemOne pre-production track was placed in a variety of extreme applications that included: High Impact, Wet and Dry Abrasion, Aggregate and General Earthmoving Undercarriage wear life varies with the application and operating conditions Most D8 SystemOne undercarriage life improvements ranged from 1.25 to 2 times the life of standard fixed bushing track put in the same application. Best life improvements were seen in abrasive applications where some machines exceeded 2 times the life of standard undercarriage. With D8 SystemOne track and center tread idlers, less wear occurs on the link rail surface, resulting in greater track link life and less link scallop. The seal system in the D8 SystemOne track has a four year/6000 hour warranty. Although some preproduction D8 SystemOne track ran in excess of 8000 hours in non-abrasive long life applications, ultimate track life in non-abrasive applications will be dictated by the seal life within the cartridge. Therefore in long life, non-abrasive applications link wear life may still be present when the track will be discarded due to exhausted track seal life. In summary, D8 SystemOne track provides significantly improved track life in abrasive applications. In applications which see long life with conventional fixed bushing track, the benefits with D8 SystemOne are service life with no downtime for pin/bushing turns, and reuse of idlers and sprocket segments.
Camber for D8 SystemOne Ver imagen
Illustration 10
g01749545
Straight roller frames deflected under tractor weight (exaggerated)
Camber is the addition of positive angle in the pivot shaft bore in the track roller frames. This is done to overcome the negative effect of the machine body weight which when combined with the drawbar load causes the track to thrust outward. Refer to Illustration 10.
Ver imagen
Illustration 11
g01749548
Cambered roller frames (exaggerated). When machine weight is added the tracks run straight with no outward thrust.
Camber on D8 Track-Type Tractorsis accomplished by changing the pivot shaft bore in the rear track roller frame from a bore machined straight through the rear track roller frame to a bore machined with a positive angle. When the weight of the machine is placed on the track roller frames with camber, the roller frames deflect causing the track to run parallel to the ground without thrust toward the outside. •
• • •
• •
•
The addition of camber to the pivot shaft bores will be standard from the East Peoria factory on all new D8 tractors starting 1January 2009. This includes both machines ordered with standard track as well as the SystemOne option. Camber will be standard on all D8 machines purchased from Cat Brazil Ltd with a planned target date of 1May 2009. This includes SystemOne and standard undercarriage. Track roller frame toe-out or minor bogie yaw will not be part of the camber feature on D8 machines. The addition of camber on all D8 machines will reduce the outward thrust of the tracks. For conventional fixed bushing track, camber will reduce the following: outer roller flange wear, the side wear seen on the idler center tread due to contact with the link assembly and the wear caused to links and pins due to contact with the guides. Camber can be retro-fit to existing models of D8 machines, however this is an expensive procedure and as such the need should be verified. Verify the need for retro-fit of camber by installing and using SystemOne undercarriage on existing equipment and monitoring wear to the CTI thrust wings as described in ""Link and CTI Design that Resists Thrust Bias Wear" ". If thrust bias wear can be managed by rotating the CTI it would not be cost effective to perform a camber retro-fit. It was determined with pre-production D8 SystemOne that in 80 percent of all track installations, camber would not have been necessary. The retro-fit of camber to roller frames is only recommended when the effects of thrust bias wear cannot be managed using the SystemOne track. This is likely to appear in applications of extreme high abrasion
•
•
(sand and water) with standard gauge machines and with SystemOne undercarriage used on all LGP models regardless of application. Since the effects of adding camber are positive for both SystemOne and conventional fixed bushing track, Caterpillar has decided to produce one roller frame configuration for all D8 machines effective 1January 2009 from the East Peoria factory and with a planned target date of 1May 2009 from Cat Brazil Ltd. For the correct procedure for performing a camber retro-fit, contact DSN Tier 2 Undercarriage.
Wear Charts for D8 SystemOne Undercarriage Components Custom Track Service (CTS) wear charts for D8 SystemOne are available in the following locations: 1. Information Release Memo UC08-16; PELJ0975 2. Custom Track Service Handbook PEKP9400 3. Custom Track Service Software Program CTS 5.5.2.
Converting D8N, D8R, and D8T To SystemOne Undercarriage{4150} SMCS - 4150
Track-Type Tractor: D8N (S/N: 9TC1-UP; 1XJ1-UP; 5TJ1-UP; 7TK1-UP) D8R Series II (S/N: AKA1-UP; 6YZ1-UP) D8R (S/N: 7XM1-UP; 9EM1-UP) D8T (S/N: J8B1-UP; KPZ1-UP)
Introduction This Special Instruction, REHS3373 provides the procedure for converting a D8N, D8R, or D8T that is shipped from the factory with a conventional suspended undercarriage to a SystemOne undercarriage with center tread idlers.
However, D8 SystemOne with center tread Idlers is not recommended for all applications. The following should be noted: • • • •
D8 SystemOne is not recommended for waste handling applications. D8 SystemOne is not recommended for any hard bottom (non-suspended) track roller frame configuration D8 SystemOne is not recommended for LGP applications. Installation of conventional idlers is required if D8 SystemOne is to be used in a heavy packing application (stiff, heavy clays; caliche). This will prevent recoil system failures and track adjuster failures due to excessive packing between the center tread idler and track link box.
Note: Do not perform any procedure that is outlined in this publication until you have read the information and you understand the information. Do not order parts until you read the information and you understand the information.
Do not attempt to disassemble or assemble this machine until you read and understand the disassembly and assembly instructions. Improper disassembly and assembly procedures could result in injury or death.
Accidental engine starting can cause injury or death to personnel working on the equipment. To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system. Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on.
The machine must be on a level, hard surface before a separation of the track is made. Any time a separation of both tracks is made, the machine must have blocks correctly positioned so the machine will not move.
Keep away from the front of the machine when the track is pushed off the final drive. A minimum distance of 7.6 m (25 ft) is needed in front of the track to permit the track to move out onto the floor.
ReferenceRefer to the appropriate Disassembly and Assembly manual for your machine.
Required Parts for Conversion to D8 SystemOne Table 1 Summary of Parts for Conversion of D8N, D8R, and D8T to SystemOne Part Number
Description
Quantity
Refer to Table 2.
Track Group
2
278-2375
Sprocket Segment
10
Refer to Table 4 or Table 5.
Idlers For the front
2
Refer to Table 4 or Table 5.
Idlers For the rear
2
307-0761
Idler Fastener Group for Suspended Undercarriage (1)
1
316-8674
Idler Guarding Kit (1)
1
246-0775
Single Flange Rollers (Standard) (2)
16
(1)
Not required if conventional idlers are used.
(2)
Refer to Table 7 for special application roller options.
Note: SystemOne uses all single flange rollers, 16 total single flange rollers are required per machine. Table 2 D8N, D8R, and D8T Made To Order (MTO) SystemOne Track Groups Track Groups Must be Ordered as a Stock Order. (1) (2)
304-5688 Track Link Assembly is used.
Quantity
Split Master
2
276-0543
2
276-0535
2
276-0550
Extreme Service 710 mm (28 inch)
2
272-3171
Extreme Service 660 mm (26 inch)
2
272-3168
Extreme Service 660 mm (26 inch) (Center Hole)
2
272-3164
Extreme Service 610 mm (24 inch)
2
272-3163
Extreme Service 610 mm (24 inch) (Center Hole)
2
272-3169
Super Extreme Service 660 mm (26 inch) Super Extreme Service 660 mm (26 inch)(Center Hole) Super Extreme Service 610 mm (24 inch)
(1)
All Track Groups include master links.
(2)
The hardware includes 172 6V-1723 Track Bolts , 172 273-8806 Track Nuts , and 4 6V-1725 Master Link Bolts .
Note: The list of Made To Order Track may change based on the demand. Note: Some of the Made To Order Track that is listed will have a 14 day availability and some of the Made To Order Track will have a 28 day availability. Please consult your parts order representative for the up-to-date information concerning the order window for each Made To Order Track that is listed. Table 3 SystemOne Track Shoes for D8N, D8R, and D8T,
218 mm (8.58 inch) Pitch, 7/8 Bolt Type - Description
610 mm (24 inch) (ES)
610 mm (24 inch) (SES)
660 mm (26 inch) (ES Trap)
710 mm (28 inch) (ES)
610 mm (24 inch) (SES Trap)
660 mm (26 inch) (ES)
610 mm (24 inch) (ES Trap)
660 mm (26 inch) (SES Trap)
660 mm (26 inch) (SES)
710 mm (28 inch) (SES)
Master Shoe
Full Link Shoe
295-9963
246-7483
295-9966
257-6928
257-6929
246-7486
240-6674
272-3183
296-1372
276-0545
296-1396
272-3180
295-9964
272-3181
240-6673
276-0533
296-1373
276-0541
242-1931
276-0552
Table 4 D8N, D8R, and D8T SystemOne Center Tread Idlers Bogie Suspension Only
Part Number
Description
Quantity
308-4364
Track Idler Group Front (Large Diameter)
2
3084365
Track Idler Group Rear (Small Diameter)
2
Table 5 D8N, D8R, and D8T Conventional Idlers (For Heavy Packing Applications) Bogie Suspension Only Part Number
Description
Quantity
111-1730
Track Idler Group Front (Large Diameter)
2
111-1729
Track Idler Group Rear (Small Diameter)
2
Table 6 Common with D8N, D8R, and D8T PPR and Non PPR Undercarriage (Per Machine) Part Number
Description
Quantity
246-0775
Track Roller Group (Single Flange)
16 (1)
131-1651
Track Roller Cap Assembly
36
246-0775
Carrier Roller
2 (2)
246-0775
Track Roller Group
16 (2)
6T-1140
Bolt (Rollers)
72
5P-8249
Hard Washers (Rollers)
72
131-1644
Track Idler Cap Assembly
8
8T-4994
Hard Washers (Track Guides)
32
248-2987
Guide
16 (3)
8T-8924
Bolt (Guide)
32
8T-4994
Hard Washer (Guide)
32
5P-7665
Bolt (Sprocket)
50
7H-3608
Nut (Sprocket)
50
6V-5841
Hard Washer (Sprocket)
50
5P-7665
Bolt (Sprocket)
70 (4)
7H-3608
Nut (Sprocket)
70 (4)
6V-5841
Hard Washer (Sprocket)
70 (4)
(1)
Only 8 per machine with conventional undercarriage, D8 SystemOne requires all single flange rollers.
(2)
The 246-0775 Track Roller Group was effective with D8T (S/N: KPZ1290-UP; 9EM2919-UP). The 246-0775 Track Roller Group is slightly wider and is identified with 246-0778 or 284-5458 stamped on the flange of the roller.
(3)
The 248-2987 Guides are effective on D8T machines that were built after November 2005. New 248-2987 Guides are required on older machines equipped with SystemOne to assure proper clearance between links and guides. Use of the former guides can lead to link failures due to excessive contact between the links and the guides.
(4)
Order 70 bolts, 70 nuts, and 70 washers in order to mount each 278-2375 Sprocket Segment with seven bolts. Five bolts can be used to mount each segment, but for greater segment retention use seven bolts. Refer to instructions for drilling the final drive in ""Drill Bolt Holes in the Final Drive" ".
Note: If the tractor requires carrier rollers, two additional Track Roller Groups must be ordered. Table 7 D8N, D8R, and D8T SystemOne Track Rollers and Carrier Rollers Per Machine
Part Number
Quantity
246-0775 (1)
16 (2)
Description
Part Number
Quantity
Roller Shell
284-5456
1
Collar
107-3945
2
Shaft
107-8084
1
Retainer
107-8085
2
Duo-Cone Seal Gp
162-7862
2
Single Flange (SF) Arctic
278-9539
16
Single Flange (SF) High-Heat/Extreme Temperature
278-9538
16
Single Flange (SF) components of Group
Special Application Roller Groups
(1)
The 246-0775 Track Roller Group was effective with D8T (S/N: KPZ1290-UP; J8B734-UP; 9EM2919-UP) The internal width of the 246-0775 Track Roller Group is slightly wider and can be identified with 246-0778 or 284-5458 stamped on the flange.
(2)
SystemOne uses all Single Flange Rollers
Torque Specifications Table 8 Torque specifications for D8 SystemOne Undercarriage
Track Shoes
Serrated Master Links
650 ± 70 N·m (480 ± 51 lb ft) +1/3 turn
650 ± 70 N·m (480 ± 51 lb ft) +1/3 turn
Undercarriage Rollers (Suspended) Mounting Bolts
Carrier Rollers
Idler Mounting Bolts (With Center Tread Idlers)
Idler Mounting Bolts (With Conventional Idlers)
Track (Guide Bolts)
Sprocket Segments
750 N·m (550 lb ft)
750 ± 70 N·m (550 ± 50 lb ft)
1600 ± 200 N·m (1180 ± 150 lb ft)
1600 ± 200 N·m (1180 ± 150 lb ft)
475 ± 50 N·m (350 ± 40 lb ft)
300 ± 50 N·m (220 ± 40 lb ft) + 1/3 turn
Installation Instructions Note: The following work can be performed without removing the track roller frames. Removing the track roller frames is recommended in order to facilitate component inspection and restoration as described in Step 5. 1. Separate the track. Refer to Disassembly and Assembly, "Track - Separate". 2. Remove the track roller frames. Refer to Disassembly and Assembly, "Track Roller Frame - Remove". 3. Remove the idlers. Refer to Disassembly and Assembly, "Idler - Remove" 4. Remove the track rollers and track guides. Refer to Disassembly and Assembly, "Track Roller Frame Disassemble".
Note: When performing a retro-fit from standard undercarriage to SystemOne undercarriage for the D8, some of the existing single flange rollers may be suitable for use and would not require removal. The D8 SystemOne undercarriage requires the use of all single flange rollers. Refer to the first item in Table 6. 5. Refer to Special Instruction, REHS1757, "Rebuild Guidelines for the Suspended Undercarriage" for inspection and reconditioning of the track roller frames and components for the track roller frame.
Note: Design specifications are specified in Special Instruction, REHS1757 and Special Instruction, SEHS8972. It is imperative for the successful performance of D8 SystemOne undercarriage that the following components are within design specifications:
o o o
o o
Refer to Special Instruction, SEHS8972, "Reconditioning of Bearing Surfaces and Pivot Shaft Ends" for pivot shafts, pivot shaft seals, and bearings. Equalizer Bar and Pins Track roller frame guides, referred to as Twister-Resistor. An out of specification condition of the Twister-Resistor will result in increased thrust wear to the sides of the inner link area. This will occur due to contact with the sides of the front center tread idler. Major bogies and cartridge pins Minor bogies and cartridge pins
Installation of the New Sprocket Segments Ver imagen
Illustration 1
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1. Install the 278-2375 Sprocket Segment with 5P-7665 Bolts , 6V-5841 Hard Washers , and 7H-3608 Nuts . Apply SAE30W oil to the threads of the bolts. Install the bolts. Refer to Illustration 1. Make sure that washer (1) is installed between the head of the bolt and the flange on the hub. Tighten the bolts to a torque of 300 ± 50 N·m (220 ± 37 lb ft). Tighten the bolts an additional 1/3 of a turn.
Note: The final drives Do Not require removal from the machine in order to drill for the new seven bolt segments. Refer to Illustration 5.
Note: The undercarriage pitch for SystemOne is 2.1 mm (0.083 inch) longer so the new sprocket segments must be used. Note: The final drives on current D8N, D8R, and D8T machines have only five holes for the sprocket segments in order to bolt to the final drive. The new sprocket segments have seven holes in order to bolt to the final drive. The new sprocket segments can be bolted to the final drive with five bolts or for greater sprocket segment retention, drill two additional holes per segment in the final drive hubs. Follow the Steps that are shown below to drill the two additional bolt holes in the final drive in order to use all bolt holes in the new sprocket segments. Note: D8R and D8T machines that will be equipped with a SystemOne undercarriage from the factory will utilize all available bolt holes for maximum segment retention. Drill Bolt Holes in the Final Drive 1. Remove four bolts that are equally spaced from the final drive. 2. Make a cover plate for the final drive from mild steel that is 6.35 mm (0.250 inch) to 9.53 mm (0.375 inch) thick. The outside diameter of the cover plate should be 595 mm (23.5 inch). Drill four 25.4 mm (1.000 inch) holes in the cover plate in order to match the bolt holes in the final drive for the four bolts that were removed.
Ver imagen
Illustration 2
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3. Make four round spacers (2) from mild steel approximately 38 mm (1.500 inch) long. Drill a 25.4 mm (1.000 inch) hole in each spacer.
Ver imagen
Illustration 3
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4. Place cover plate (1) on top of final drive (3) with spacers (2). Spacers (2) should be positioned on final drive (3) over the four bolt holes from the bolts that were removed in Step 1. Secure cover plate (1) to final drive (3) with bolts (4). Bolts (4) must be longer in order to go through cover plate (1) and spacers (2) and thread into final drive (3) .
Ver imagen
Illustration 4
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5. Mount segments (5) to final drive (3) with the five original bolt holes.
Ver imagen
Illustration 5
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6. Attach magnetic drill (6) to cover plate (1). Use a 21 mm (0.827 inch) drill bit (8) and an extension for the drill bit (7) that is a minimum of 304.800 mm (12 inch) in length.
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g01413276
Illustration 6
(A) The holes in the sprocket segment that will be used as a guide to drill into the final drive
Ver imagen
Illustration 7
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7. Align magnetic drill (6) in the proper location. Drill the holes into final drive (3) with the holes in sprocket segment (5) as a guide. Each sprocket segment (5) will have seven holes. The final drive hub does not need to be removed from the machine in order to drill the holes.
Ver imagen
g01412912
Illustration 8
8. Refer to Illustration 8 for the final drive with holes (A) that are drilled.
Install the Guarding on the Track Roller Frames for the Center Tread Idlers Description of Guarding Kit for the Center Tread Idler
Note: The kit and modifications in this section are not required when conventional idlers are used. Table 9 316-8674 Center Tread Idler Guarding Kit Sales Model D8N D8R D8T
Part Number
316-8665
Description
Quantity for One Machine
Top Plate for the rear frame
2 2 2
D8N D8R D8T
Scraper Plate for the rear frame
2 2 2
Top Plate for the front frame
2 2 2
Side Plate for the front frame
4 4 4
316-8668
Deflector Plate for the front frame
4 4 4
316-8670
Gusset for the side plate on the front frame and Gusset for the rear deflector on the rear frame
12 12 20
D8N D8R D8T
316-8672
Modified Gusset for the front deflector on the front frame and Gusset for the rear deflector on the rear frame
4 4 4
D8N D8R D8T
316-8673
Gusset for the front deflector on the front frame and Gusset for the rear deflector on the rear frame
16 16 8
Deflector Plate on the rear frame
4 4 4
Side Fin on the rear frame
4 4 4
D8N D8T D8R D8N D8R D8T D8N D8R D8T D8N D8R D8T
D8N D8T D8R D8N D8T D8R
316-8667
316-8664
316-8666
316-8669
316-8671
Installation Procedure for the 316-8674 Center Tread Idler Guarding Kit (Front) Ver imagen
Illustration 9
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1. Grind rear corners (1) on 316-8664 Plate (2) in order to ensure the proper fit to frame (3). Refer to Illustration 9.
Ver imagen
Illustration 10
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2. Insert plate (2) into frame (3). Make sure that plate (2) is flush with the top surface of frame (3) and notch (4) is facing outward. Refer to Illustration 10.
Ver imagen
Illustration 11
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3. Tack weld plate (2) in locations (5). Refer to Illustration 11.
Ver imagen
Illustration 12
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4. Place a mark on the frame in location (A). Measure 105 mm (4.134 inch) from location (A) and mark the frame in location (B). Measure 105 mm (4.134 inch) from location (B) and mark the frame in location (C). you will need to do this procedure on both sides of the frame. Refer to Illustration 12.
Ver imagen
Illustration 13
g01414379
5. Place the center of 316-8670 Gussets (6) on the marks on the frame from Step 4. Recess the top surface of gussets (6) 16 mm (0.630 inch) from the top edge of frame (3). Tack weld all gussets (6) in place. Refer to Illustration 13.
Ver imagen
Illustration 14
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6. Weld all gussets (6) on both sides with a 16 mm (0.6299 inch) fillet weld. Refer to Illustration 14.
Ver imagen
Illustration 15
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7. Insert both 316-8666 Plates (7). Make sure that the plates are flush with the top surface of plate (2) and flush with frame (3). Make sure that plates (7) are inserted with the beveled edges toward plate (2). Make sure that gap (E) between plates (7) is 110 mm (4.331 inch). Tack weld both plates (7) all around.
Ver imagen
Illustration 16
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8. Weld the bottom of plates (7) to gussets (6) all around with a 16 mm (0.630 inch) fillet weld. Weld the plates to the gussets on both sides of the gussets. Refer to Illustration 16.
Ver imagen
Illustration 17
Ver imagen
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Illustration 18
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9. Tack weld 316-8668 Plates (8) to 316-8666 Plates (7). The top edge of plates (8) needs to be flush with the top surface (G) of plates (7). Plates (8) should be angled down 45 degrees (F). Refer to Illustration 17. The inside edge of plates (8) needs to be flush with the inside edge of plates (7). Refer to Illustration 18 (H) .
Ver imagen
Illustration 19
g01414785
10. Tack weld 316-8673 Gusset (9) beneath plate (8). Gusset (9) should be flush with the outer surface of frame (3). Gusset (9) is not required on early models with track roller frames with tapered ends.
Ver imagen
Illustration 20
g01414810
11. Tack weld 316-8673 Gusset (9) to plate (8) and frame (3). Gusset (9) should be flush with the inner surface of frame (3) .
Note: 316-8668 Gusset (9) will not be used on the roller frames for D8N. The rear plates will be over laid on the bent tail portion of the front track roller frame.
Ver imagen
Illustration 21
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12. After all of the parts are installed, finish welding all of the parts with a 16 mm (0.630 inch) fillet weld. Refer to Illustration 21.
Ver imagen
Illustration 22
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13. Paint the guard for the center tread idler with Caterpillar yellow paint when all of the welding is completed. Refer to Illustration 22.
316-8674 Center Tread Idler Guarding Kit (Rear) Note: The kit and modifications in this section are not required when conventional idlers are used. Note: You must install 316-8671 Plates if your machine is not equipped with these plates. Some track frames are not equipped with 316-8671 Plates . Follow Step 1 in order to install the plates.
Ver imagen
Illustration 23
(3) Frame (10) 316-8671 Plate (H) 106 mm (4.173 inch)
Ver imagen
g01415020
Illustration 24
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1. Install 316-8671 Plates (10) to frame (3). Align the inside surface of plates (10) to the inside surface of frame (3). The distance from the surface of frame (3) to the top of plate (10) should be (H) 106 mm (4.173 inch). Make sure that the edge (J) of plate (10) is flush with the edge of frame (3). Tack weld plate (10) to frame (3). Plates (10) should be the same height. Refer to Illustration 23 and 24.
Ver imagen
Illustration 25
g01415650
2. Align the bottom rear corner of 316-8665 Plate (11) with the rear corner of plate (10). Center plate (11) in plate (10). Tack weld plate (11) to plate (10) .
Note: Bar stock (K) was added for installation purposes only. Plate (11) has been lengthened in order to lay across the top of plates (10) .
Ver imagen
Illustration 26
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Plate (12) is roughly parallel with angled edge (P) of plate (10) .
Ver imagen
Illustration 27
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Refer to Illustration 27 for a side view of plate (12) installed on mounting bar (M) .
(M) Mounting Bar (12) 316-8667 Plate (N) The correct location and orientation of 316-8667 Plate (12) installed on mounting bar (M)
3. Place 316-8667 Plate (12) against the top rear corner of plate (11). Refer to edge (Q) in Illustration 26. If the rear frame has mounting bar (M) installed, plate (12) will need to be trimmed to a dimension of 280 mm (11.024 inch) by 180 mm (7.087 inch). If mounting bar (M) is not installed on the frame, install plate (12) with the original dimensions 280 mm (11.024 inch) by 215 mm (8.465 inch). If mounting bar (M) is not installed on the frame, install plate (12) with the top edge flush with the bottom edge of plate (11). Refer to edge (Q) in Illustration 26. This will align plate (12) parallel with edge (P) of plate (10) .
Note: Plate (12) can be ground in order to fit the angle of plate (10) .
Ver imagen
Illustration 28
g01415748
(6) 316-8670 Gusset (11) 316-8665 Plate (L) 155 mm (6.102 inch)
4. Measure 155 mm (6.102 inch) from the bottom of plate (11) to the center of gusset (6) and tack weld gusset (6) in this location. Make sure that the top surface of gussets (6) are flush with the slanted edge of plate (10) .
Ver imagen
Illustration 29
g01416176
5. Place 316-8669 Plates (13) on top of gussets (6). Make sure that the top edge of plates (13) are flush with the top surface of plate (11) and aligned with the gap on plate (11). Make sure that the bottom edges of plates (13) are flush with each other. Make sure that gap (P) between plates (13) is 104.5 mm (4.114 inch). Tack weld both plates (13) all around.
Ver imagen
Illustration 30
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6. Finish welding the underside of plates (13) to gussets (6) with a 16 mm (0.630 inch) fillet weld.
Ver imagen
Illustration 31
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Note: The gussets that are installed in Step 7 will depend on if your machine is a D8N, D8R, or a D8T. For a D8T (N/WDA) Series I and Series II rear guard 316-8670 Gusset will be used. For a D8R (N/WDA) Series I and Series II rear guard 316-8673 Gusset will be used. For D8R and D8T 316-8672 Gusset will be used if the frame has obstructions in the gusset location. 7. Tack weld 316-8670 Gussets , 316-8673 Gussets , or 316-8672 Gussets beneath plate (13) with the outer surface of gusset (6) flush with the outer surface of frame (3). Refer to Illustration 31.
Ver imagen
Illustration 32
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8. Tack weld inside gusset (6) flush with inside frame (3). Do this procedure for both inside gussets (6) .
Ver imagen
Illustration 33
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Ver imagen
Illustration 34
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Ver imagen
Illustration 35
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9. Finish weld all of the plates with a 16 mm (0.6230 inch) fillet weld.
Refer to Illustration 33, Illustration 34, and Illustration 35.
Ver imagen
Illustration 36
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Ver imagen
Illustration 37
Ver imagen
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Illustration 38
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Refer to Illustration 38 for a simulated Front Guard Ready Undercarriage with all of the guards completely installed.
Ver imagen
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Illustration 39
Refer to Illustration 39 for a simulated Rear Guard Ready Undercarriage with all of the guards completely installed.
10. Paint the plates with Caterpillar yellow paint after all of the welding is complete. Refer to Illustration 36 and Illustration 37.
Install Shims for Bogie Pads, Track Roller Groups, Track Guides, and New Center Tread Idlers (For Machines With Suspended Undercarriage) Note: The parts listed in this section are not required when conventional idlers are used. Table 10 Required Parts for Suspended Undercarriage 307-0761 Idler Fastener Group Part Number
Description
Quantity
3S-1349
Hard Washer (Idler Mounting)
16
8T-4934
Bolt (Idler Mounting)
16
307-0771
Block Assembly (Idler) (1)
8
8T-9380
Bolt (Bogie Shim Mounting)
64
8T-5360
Hard Washer (Bogie Shim Mounting)
64
7T-4699
Plate (Bogie Shim)
16
(1)
307-0771 Track Idler Block will change to one piece ductile iron after validation. The part number will then become 3070762 Block . The new block will be available approximately July, 2008.
Ver imagen
Illustration 40
g01401821
Use 16 5 mm (0.197 inch) 7T-4699 Bogie Shims , 64 8T-9380 Bolts for the bogie shims, and 64 8T-5360 Washers for the bogie shims. (1) 5 mm (0.197 inch) Shim (2) 5 mm (0.197 inch) Shim (3) 5 mm (0.197 inch) Shim (4) 5 mm (0.197 inch) Shim (5) 5 mm (0.197 inch) Shim (6) 5 mm (0.197 inch) Shim (7) 5 mm (0.197 inch) Shim (8) 5 mm (0.197 inch) Shim
1. Remove the upper bogie pads and lower bogie pads and install one 5 mm (0.197 inch) shim under each bogie pad. Install eight shims for each track roller frame, four shims on the frame and four shims on the major bogies. Refer to Illustration 40. The shims and the hardware are part of the 307-0761 Idler Fastener Group . Tighten the bolts to 70 ± 15 N·m (50 ± 10 lb ft). 2. Install the 246-0775 Track Roller Groups with the existing roller caps and bolts. Tighten the abutment side of the cap first. Tighten the bolts to 750 ± 70 N·m (555 ± 50 lb ft). 3. Install the 248-2987 Guides with the existing hardware. Tighten the bolts to 475 ± 50 N·m (350 ± 35 lb ft).
Ver imagen
g01417658
Illustration 41
4. Remove existing sleeve (1) for installing a center tread idler. Refer to Illustration 41 for a shim block and a cap installation for a center tread idler. 5. Install the front and rear center tread idlers. Refer to Table 4 or Table 5 depending on your requirements. Use 307-0771 Track Idler Block (2), 131-1644 Track Idler Cap Assembly (3), 8T-4934 Bolts (4), and 3S-1349 Hard Washers (5). Tighten the abutment side first. Torque bolts to 1600 ± 200 N·m (1180 ± 150 lb ft). Refer to Illustration 41.
Note: The parts that are used for the installation of the center tread idlers are supplied in 3070761 Idler Fastener Group that is described in Table 10. Note: The front center tread idler measures 786 mm (30.9 inch) in diameter. The rear center tread idler measures 720 mm (28.3 inch) in diameter.
Installation of the Track Groups Install the track groups on the machine and connect the tracks. Adjust the track for proper sag. Table 11 Track Sag Carrier Roller
Minimum
Target
Maximum
Machines Without a carrier roller
Machines With a carrier roller
105 mm (4.1 inch)
115 mm (4.5 inch)
125 mm (4.9 inch)
55 mm (2.2 inch)
65 mm (2.6 inch)
75 mm (3.0 inch)
Standard Track Table 12 Track Sag for Standard Track
No Carrier Roller (2)
Carrier Roller (3) and (4)
Minimum
Target
Maximum
105 mm (4.1 inch)
115 mm (4.5 inch)
125 mm (4.9 inch)
55 mm (2.2 inch)
65 mm (2.6 inch)
75 mm (3 inch)
SystemOne Track Table 13 Track Sag for SystemOne Track No Carrier Roller (2)
Carrier Roller (3) and (4)
115 ± 10 mm (4.5 ± 0.4 inch)
65 ± 10 mm (2.6 ± 0.4 inch)
If the tractor is used in a sprocket jump application 100 ± 10 mm (4.0 ± 0.4 inch)
If the tractor is used in a sprocket jump application 60 ± 10 mm (2.4 ± 0.4 inch)
If the tractor is used in a severe sprocket jump application 90 ± 10 mm (3.5 ± 0.4 inch)
If the tractor is used in a severe sprocket jump application 55 ± 10 mm (2.2 ± 0.4 inch)
Required Tooling for Multi-Pitch (Repair Only)
The Caterpillar Multi-Pitch Tool now has added components for use with D8 SystemOne track. Refer to Special Instruction, REHS2403, "Installation and Removal of SystemOne Track With the Multi-Pitch SystemOne Track Press Tool" for complete instructions on the use of the multi-pitch tool. Refer to Undercarriage Reconditioning Bulletin, SEBF9100, "Field Repair for SystemOne Track with Multi-Pitch Track Press Tool" for the use of the multi-pitch tool for field service . Refer to Table 14 for a complete list of tools that are available for the multi-pitch tool. Note: Special tooling is not required to do a conversion and installation of D8 SystemOne. All of the link assemblies and all of the track groups are equipped from the factory with (split) serrated master links. Multi-pitch tooling is needed for product support of repairs if repairs are required, in order to replace a box section. Note: The current version of D8 SystemOne Undercarriage includes split master links with each track group or link assembly. Refer to Special Instructions, REHS4336 for the replacement of serrated master links in D8 SystemOne track. Table 14 Complete Tool List for D8 SystemOne Part Number
Description
Quantity
264-5770
Puller Plate
1
264-5768
Plate
2
265-8989
Nut
264-5774
Stud
264-57777
Block
2
265-8035
Hydraulic Cylinder (75 Ton)
1
289-5146
Contact Plate (Install)
272-1505
Contact Plate (Remove)
279-0092
Spacer
(1)
12
(1)
4
(2)
(2)
4 (2)
1 6
(2)
8H-3127
Bolt
4
5P-8249
Washer
8
4L-7124
Bolt
2
268-7901
Shim
2
264-5776
Guard
1
264-5772
Hold Down Strap
2J-5245
Bolt
5M-2894
Washer
9S-8752
Nut
(3)
2
9S-8752
Nut
(3)
2
3S-6224
Hydraulic Pump (Electric)
1
4C-5599
Anti-Sieze Compound
1
(3)
(3)
2 2
(3)
(1)
ACME Thread
(2)
New Part Numbers And Additional Tools
(3)
Parts For The Guard
4
Modifications Required for Machines With a Striker Bar When retrofitting a D8N, D8R, or a D8T with a striker bar, the grouser on Extreme Service track shoes (ES) and Super Extreme Service track shoes (SES) may contact the rear striker bar and the gusset for the rear striker bar. This may occur when the rear major bogie and rear idler are fully articulated upward. Therefore, the striker bar and gusset may need modifications. Note: Only the rear striker bar is affected.
Ver imagen
Illustration 42
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1. Back the tractor on blocks (Q) in order to put rear major bogie (R) in the uppermost position against the stops.
Ver imagen
Illustration 43
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2. Do not cut welds (U). Cut off gusset (S) just outboard of weld (U). Stop the chamfer on striker bar (T) just outboard of weld (U) in order to protect the integrity of the rear enclosure.
Ver imagen
Illustration 44
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3. Remove gusset (S) flush with the striker bar on both sides of the tractor.
Ver imagen
Illustration 45
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4. After gusset (S) is removed, chamfer striker bar (T) in order to allow clearance for the grouser if necessary. The dimension for the clearance for the grouser to the striker bar is 25.4 mm (1 inch) wide by a maximum of 38.1 mm (1.5 inch) tall from the end of striker bar (T). Only chamfer enough material from striker bar (T) in order to obtain a 6.350 mm (0.250 inch) clearance between the shoe and striker bar (T) .
Undercarriage SMCS - 4150
Components of the Undercarriage Ver imagen
Illustration 1
g01439370
Undercarriage (1) Rear idler (2) Rear track roller frame (3) Pivot shaft (4) Access port for track adjustment (5) Recoil oscillation guide (6) Front track roller frame (7) Track (8) Front idler (9) Major bogie (10) Minor bogie (11) Track roller (12) Idler guards
The undercarriage consists of the following major components: Track Roller Frames - The track roller frames consist of front track roller frame (6) and rear track roller frame (2) . Pivot Shaft - Pivot shaft (3) connects the roller frames to the machine main frame. Each roller frame can oscillate at the pivot shaft.
Equalizer Bar - The equalizer bar connects the two roller frames at the front of the machine. Oscillation of the roller frame is controlled by the equalizer bar. Track Idlers - Front idler (8) is installed on front track roller frame (6). Rear idler (1) is installed on rear track roller frame (2) . Major Bogies - Each major bogie (9) contains a cartridge pin. Minor bogies (10) pivot on these cartridge pins. Minor Bogies - Each minor bogie (10) supports two track rollers (11) . Track Rollers - Eight track rollers (11) on each side guide the tracks. Tracks - Tracks (7) are sealed and lubricated for extended service life. Idler Guards - The idler guards (12) deflect material from the area around the track link box. The idler guards keep the area clear so that the bushings in the track can turn freely on the idlers.
Track Roller Frame Ver imagen
Illustration 2
Track roller frame (2) Rear track roller frame (4) Access port for track adjustment (5) Recoil oscillation guide (6) Front track roller frame
Ver imagen
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Illustration 3
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Recoil spring assembly (12) Valves (13) Cylinder assembly (14) Piston (15) Tube assembly (16) Spring (17) Retainer
The track roller frame can be separated into two sections. Front track roller frame (6) has a large tube assembly that telescopes or slides into rear track roller frame (2). The recoil spring assembly is inside this tube. A groove is machined in the outer diameter of the tube. Recoil oscillation guide (5) is installed in rear track roller frame (2). After installation, the oscillation guide is in alignment with the groove in the tube. The oscillation guide prevents any rotation of the tube inside the rear section of the track roller frame. The guide allows the tube to move back and forth in the frame section during recoil. Valves (12) are used for moving the front roller frame in order to adjust the track. When grease is pumped into the filler valve through access port (4) for the track adjustment, piston (14) moves in a forward direction. This movement causes the front track roller frame to move out of the rear roller frame. The track tightens. Tension on the track is released by a relief valve.
Track Rollers
Single Flange Ver imagen
Illustration 4
Single flange track roller (18) Shaft (19) Thrust washer (20) Duo-Cone seal
Double Flange Ver imagen
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Illustration 5
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Double flange track roller (18) Shaft (19) Thrust washer (20) Duo-Cone seal
The track rollers are fastened to the minor bogies. The track rollers are in contact with the inside surfaces of the track links. Flanges on the track rollers prevent movement of the track from side to side. The inside surfaces of the track links equally distribute the weight of the machine over the track. Each track roller frame has eight track rollers. Four of the rollers are single flange rollers. Four of the rollers are double flange rollers. Rollers are arranged in the following sequence. Start at the front of the machine. No. 1 Roller - Single flange No. 2 Roller - Single flange
No. 3 Roller - Double flange No. 4 Roller - Double flange No. 5 Roller - Double flange No. 6 Roller - Double flange No. 7 Roller - Single flange No. 8 Roller - Single flange The track rollers have Duo-Cone seals (20) at both ends of shaft (18). Thrust washers (19) absorb the side load on the roller. The center of shaft (18) is an oil reservoir. This oil is used for lubrication of the bearing surfaces. Note: SystemOne track roller frames also have eight track rollers. All eight of the track rollers are single flange rollers.
Track Idler Ver imagen
Illustration 6
Track idler (Standard track) (18) Shaft (19) Thrust washer (20) Duo-cone seal
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Illustration 7
Track idler (SystemOne track) (18) Shaft
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(19) Thrust washer (20) Duo-cone seal
Each track roller frame has a front idler and a rear idler. The front idler is slightly larger than the rear idler. The idler has Duo-Cone seals (20) at each end of shaft (18). Thrust washers (19) absorb the side load on the idler. The center of shaft (18) is an oil reservoir. This oil is used for lubrication of the bearing surfaces.
Tracks Ver imagen
Illustration 8
g01439576
Track assembly (Standard track) (21) Seal assembly (22) Track link (23) Hole (24) Bushing (25) Cavity (26) Track link (27) Pin (28) Track link (29) Track link (30) Thrust ring (31) Plug (32) Stopper
Each track link fits over the preceding track link. Track link (22) fits over track link (29). Track link (26) fits over track link (28). Each track link has a counterbore in the end that fits with the preceding track link. The connection of the track links make up the track assembly. Seal assembly (21) is installed in the counterbores of each track link. Each seal assembly has a load ring and a seal ring. The load ring pushes the seal ring against the end of bushing (24) and the link counterbore. The seal ring provides a positive seal between the bushing and the link counterbore. Thrust ring (30) is installed on pin (27). The thrust ring provides a specific amount of compression to the seal assemblies. This controls the end play (free movement) of the track link joint. The arrangement of the seal assemblies and the thrust rings keeps the oil in the track link joint. The seals also keep foreign material out of the track link joint. Pin (27) has cavity (25) which is almost the full length of the pin. Hole (23) is drilled radially in the pin near the center of the pin. Radial hole (23) allows oil to go to the surface between pin (27) and bushing (24). This oil lubricates the pin and the bushing. This oil also lubricates the lip of the seal ring. The lip of the seal ring must be kept lubricated in order to prevent wear. Oil is kept in cavity (25) by stopper (32) and plug (31). Oil is installed in the track pin through a hole in the center of stopper (32). When the cavity is filled, plug (31) is installed in the stopper.
Ver imagen
Illustration 9
Track link box (33) Track link (34) Cartridge
Ver imagen
g01452145
Illustration 10
g01452146
Track Assembly (35) Inner track link (36) Outer track link
SystemOne track assembly has links (33) and cartridges (34). The new design of the cartridge takes the place of the former pin, the bushing, and the seal components. The cartridge contains the oil for the track joint. The cartridge is sealed and lubricated for life. The cartridge is a nonserviceable part. The cartridges are serviced only as a track link box. This servicing of only the track link box ensures that the critical alignment that is required of the inner links on the cartridges is correct. The track link boxes are connected by outer links (36). The outer links (36) are rotated 180° from the inner links (35) . The new SystemOne track uses a straight track link design. This makes the link stronger and the straight link gives the link a greater ability to carry tough loads. The inner links look like the outer links but the inner links have additional wear material. The outer links also have a groove along the bottom of the outboard side of the link. The wear material is in specific locations in order to reduce thrust wear. The outer links are serviced individually. The inner links are serviced by replacing the track link boxes. ReferenceFor more information about the SystemOne Track, refer to Systems Operation Section, RENR7526, "Tracks, SystemOne Track".
Equalizer Bar Ver imagen
Illustration 11
g01439584
Equalizer bar (33) Equalizer bar saddle (34) Rubber pads (35) Track roller frames (36) Pin (37) Equalizer bar (38) Track roller frame
The track roller frames are connected together at the front by equalizer bar (37). Spherical bearings connect the equalizer bar to track roller frame (35) and (38) . The equalizer bar pivots in the center around pin (36). Rubber pads (34) on the top of the equalizer bar control the amount of oscillation of the equalizer bar.
Pivot Shaft Ver imagen
Illustration 12
g01439591
Connection of pivot shaft to track roller frame (39) Bushing (40) Bushing (41) Track roller frame (42) Pivot shaft
The track roller frames are connected at the rear by pivot shaft (42). The pivot shaft is also connected to the main frame of the machine. The track roller frames oscillate about the pivot shaft on bushings (39) and (40) .
Identification of Straight Undercarriage and Toe Out / Camber / Yaw Undercarriage{4150} SMCS - 4150
Track-Type Tractor: D11R (S/N: AAF1-UP; 8ZR1-UP; 9TR1-UP; 9XR1-UP; 7PZ1-UP) D10T (S/N: RJG1-UP) D10R (S/N: 3KR1-UP; AKT1-UP) D9T (S/N: RJS1-UP) D9R (S/N: JJB1-UP; ABK1-UP; ACL1-UP; 7TL1-UP; 8BL1-UP; WDM1-UP)
Introduction When you are servicing the undercarriage on D9, D10, or D11 elevated sprocket tractors, determining whether the machine has a straight undercarriage or a Toe Out / Camber / Yaw undercarriage is important. Tractors are equipped with Toe Out / Camber / Yaw undercarriage in order to provide greater wear life of the rollers and links in most applications. Toe Out / Camber / Yaw became standard starting with the following serial numbers: • • •
D11R (S/N: 9TR202; 9XR154) D10R (S/N: 3KR1331) D9R (S/N: 7TL1212; 8BL1422)
In very specific applications, the straight undercarriage has better wear characteristics. For this reason, the straight undercarriage became an option. Tractors may be equipped with either undercarriage after the following serial numbers: • • • • •
D11R (S/N: AAF212; 7PZ726) (June 2003) D10T (S/N: RJG1 (First Production)) D10R (S/N: AKT642) (May 2004) D9T (S/N: RJS1 (First Production)) D9R (S/N: ABK968,(April 2004); WDM1 (First Production))
Note: No D9R Track-Type Tractors with the ACL S/N prefix were produced with straight frames.
General Identification Ver imagen
Illustration 1
g01088886
Left side of drawing shows a straight undercarriage. Right side of drawing shows a Toe Out / Camber / Yaw undercarriage. (A) Toe out of the track roller frame (B) Camber of the track roller frame (C) Yaw of the track roller frame
Illustration 1 shows the differences between the two undercarriage systems. A straight undercarriage is shown on the left side of the illustration. All components of a straight undercarriage are parallel and perpendicular to the centerline of the tractor. A Toe Out / Camber / Yaw undercarriage is shown on the right side of Illustration 1. The features of Toeout and camber are contained in the pivot shaft bores and equalizer bar pin bores of the rear track roller frames. Toe out is the angling of the track roller frame away from the front of the tractor when the tractor is viewed from the top. Toe out is represented by angle (A). Camber is the tilt of the top of the track roller frame away from the tractor, when the tractor is viewed from the rear. Camber is represented by angle (B). Yaw is contained in the minor bogies. When the rollers are viewed from the top, the rollers point toward the tractor. The angle of the rollers is in the opposite direction in comparison to the angle off the toe-out of the track roller frames. This is represented by angle (C). In order to allow the track roller frames to toe out, a longer equalizer bar is also used. All components of Toe Out / Camber / Yaw undercarriage are needed for the benefits to be realized. The rear track roller frames, minor bogies, and equalizer bars are not interchangeable between the straight undercarriage and the Toe Out / Camber / Yaw undercarriage. The angles of Toe Out / Camber / Yaw undercarriage are very small. Measuring the angles is difficult. Therefore, it is very difficult to determine if a component has Toe Out / Camber / Yaw visually.
Rear Track Roller Frames A hole that is used to identify straight frames has been added to the straight rear track roller frames since reintroduction. Service replacements and frames that are used on new machines have the hole. The hole provides a quick way to identify the different frames. The hole is shown in Illustration 2. The only use of the hole is identification. The hole is drilled on the outboard side of the track skid pad to a depth of approximately 10 mm (0.39 inch). The track skid pad is located above the front bearing bore of the rear track roller frame. You may encounter an older straight frame without the identification hole. Add the identification hole to those frames. Also, If a Toe Out / Camber / Yaw rear track roller frame is converted to a straight frame, the identification hole should be added. Ver imagen
Illustration 2
g01088384
Location of Hole that Identifies Straight Frames (C) D11 1266 mm (50 inch) (C) D10 1034 mm (40.75 inch) (C) D9 844 mm (33.25 inch) (D) Hole 16.75 mm (0.66 inch) diameter, 10 mm (0.39 inch) deep (E) D11 285 mm (11.25 inch) (E) D10 217 mm (8.5 inch) (E) D9 216 mm (8.5 inch)
Check the part number of the frame in order to determine if a rear track roller frame is Toe Out / Camber / Yaw or a straight frame that was built prior to Toe Out / Camber / Yaw introduction. Many frames have the part number beneath the cover of the access hole for the track adjustment. See Illustration 3. See Table 1 for the potential part numbers of pairs of rear track roller frames for each model. If no number is present under the cover, Toe Out / Camber / Yaw features must be determined manually. Refer to ""Procedure to Identify Toe Out / Camber / Yaw Undercarriage" ". For further assistance, make a Service Request entry
into DSN or contact Tier 1 directly. Ask that your request be forwarded to the Tractor Product Group, Tier 2. The service request should include the machine's serial number and the nature of your request. Ver imagen
g01122619
Illustration 3 (F) The part number may be stamped here.
Table 1 Components of Toe Out / Camber / Yaw Undercarriage Rear Track Roller Frames Toe Out / Camber / Yaw
D9N D9R D9T
RH
LH
1558097
1558098
1558099
1558100
1958744
1958745
195-
195-
Straight RH
LH
7T5200
7T5201
8E6921
8E6922
1Q3692
1Q3693
195-
195-
Minor Bogies Toe Out / Camber / Yaw RH
LH
1573106
1573107
Straight
7T-5420
Equalizer Bar Toe Out / Camber / Yaw
160-6610
Straight
8E-2828
117-3355
1444
D10N D10R D10T
D11N D11R D11T
1445
1475352
1475353
1564203
1564204
1721642
1721643
2123498
2123499
1380576
1380577
1397721
1397722
1534987
1534992
1588049
1588048
1756802
1756803
1756804
1756805
106-
106-
8742
8743
2292592
2292593
8E6914
8E6915
7T3957
7T3956
9W9538
9W9539
1Q3741
1Q3742
2567214
2567215
3T7466
3T7467
6Y2684
6Y2685
1425875
1425877
1883290
1883291
1883292
1883293
1024325
1024326
222-
222-
1564208
1564209
6T-1382
161-9228
3T-2284
222-3677
1384151
1384152
9W-6723
143-3331
3T-7786
7400
7401
2224090
2224091
4092
4093
Minor Bogies Minor bogies with yaw are specific for the right side or the left side. This creates a total of three minor bogie orientations. The three are straight, right hand, and left hand. The part number can be used to determine the orientation of a minor bogie. Minor bogies have a raised pad on the side of the part that contains three different part numbers. The machining process determines the orientation of a minor bogie. When the bogies are machined, the extra part numbers are machined from the pad and only the correct part number remains. If the part is straight, the top part number will remain. If the part is for the right side, the middle part number will remain. If the part is for the left side, the bottom part number will remain. See Table 1 for part numbers relative to each model. Minor bogies with yaw must be installed on the correct side of the tractor. Incorrect installation weakens the bolted joint of the minor bogie to the roller. Right hand minor bogies must be used on the right side of the tractor. Left hand minor bogies must be used on the left side of the tractor. Left and right are determined when you are looking at the tractor from the rear.
Equalizer Bars The proper equalizer bar for each undercarriage can be determined by measuring the distance between the centerlines of the end pins. See Table 2 for the length of the equalizer bar for each model. The equalizer bars also have a raised part number or a stamped part number that can be referenced in Table 1. Table 2 Model D11R D10R D9R
Toe Out / Camber / Yaw Frame
Straight Frame
2082 mm (82 inch)
2067.6 mm (81.4 inch)
1831.4 mm (72.1 inch)
1820 mm (71.65 inch)
1610.8 mm (63.4 inch)
1600 mm (63 inch)
Procedure to Identify Toe Out / Camber / Yaw Undercarriage Table 3 Required Tools Item
Description
Qty
1
Combination Square
1
2
String
1
3
Plumb Bob
1
4
Tape Measure
1
Measurements must be taken in order to manually determine if a rear track roller frame has the features of toe out and camber. The measurements compare the face of an outboard front frame guide (twister resister) to an outboard face of the pivot shaft. The tools that are needed to take the measurements are a combination square, a piece of string, a plumb bob, and a tape measure. You may have other tools that work. Read the procedure in order to determine if the other tools are suitable. The frame may be on the tractor or the frame may be off of the tractor. The frame may be right-side up. The frame may be upside-down. Any of these positions are acceptable when you are performing the necessary measurements. The areas of the front frame guide (twister resister) and the pivot shaft must be accessible. The cover for the front frame guide (twister resister) and the bulldozer trunnion must be removed. Remove the key for the front frame guide (twister resister) or ensure that the key is below the face. Nothing should protrude from the pivot shaft bore. Both faces must be free of debris. All measurements should be taken in millimeters. One inch equals 25.4 millimeters. Measurements (A), (B), (E), and (F) must be accurate within one millimeter. Measurements (C) and (G) must be accurate within five millimeters. See Illustration 5. Refer to the following procedure in order to take the measurements: Ver imagen
Illustration 4
g01142888
1. Securely attach the string (2) and the plumb bob (3) to the short leg of square (1) . Ver imagen
Illustration 5
g01142890
2. Illustration 5 shows the measurements that will need to be taken. a. Measurements (A), (B), and (C) are taken from the front frame guide (twister resister). b. Measurements (E), (F), and (G) are taken from the pivot shaft. c. Callouts (A) and (E) are the horizontal distances from the attachment point of the string to the edge of the square. The square will be against the twister resister or the face of the pivot shaft bore. Note: Mark the attachment point of the string (AA) and measure that point prior to taking measurements on the frame. See Illustration 4. This distance is accurate for dimension (A) and dimension (E) as long as the string hangs directly from the point of attachment. Note: Mark a vertical location on the string. Measurements (B), (F), (C) and (G) will be taken at that mark. Mark the string prior to starting the process of measuring. The exact location of the mark is not critical. However, maximizing the length of distances (C) and (G) will provide more accurate results. Make sure to measure exactly from that mark in order to obtain measurements (B), (F), (C), and (G) .
d. Callouts (B) and (F) are the horizontal distances between the mark on the string and the edge of the square. The square will be against the twister resister or the face of the pivot shaft bore. Note: Ensure that the attachment point of the string has not shifted between taking measurements (A) and (B) . Note: Ensure that the attachment point of the string has not shifted between taking measurements (E) and (F). e. Callouts (C) and (G) are the vertical distances between the mark on the string and the attachment point of the string. This distance may be limited by the outside diameter of the face of the twister resister on the D9 and on the D10. Ver imagen
Illustration 6
g01143034
3. Place the long leg of the square against the face of the twister resister. Orient the square so that the string hangs in the same direction as the long leg of the square. Ensure that the square is vertical. 4. If a measurement was not obtained from the note in Step 2.c, measure distance (A) on the twister resister. Record the measurements on Table 4. 5. Measure distance (B) on the twister resister. Record the information on Table 4.
6. If a measurement was not obtained from the note in Step 2.e, measure distance (C). Record the measurements on Table 4. Ver imagen
g01143085
Illustration 7
7. Repeat the measurements on the face or the pivot shaft. Record (E), (F), and (G) on Table 4. Table 4 Twister Resister
Pivot Shaft
A=
E=
B=
F=
C=
G=
D=A-B=
H=E-F=
J= (H*C)/G= K= J-D= M=K*292.1= N=C*3.314= P=N/M= Use the spaces in Table 4 in order to fill in the measurements that are taken throughout the procedure. Once the six measurements are taken, calculate the other values. Use the formulas that are listed in the table to calculate values (D), (H), (J), and (K). If value (K) is between -1 and 1, the frame is a straight frame. If value (K) is less than -1 or greater than 1, calculate values (M), (N), and (P). If (P) is between -0.77 and -1.43 or if (P) is between 0.77 and 1.43, the frame has toe out and camber features. If (P) is not between -0.77 and -1.43 or if (P) is not between 0.77 and 1.43, then check the calculations for a mistake or repeat the measurements more accurately.
Summary • •
• • •
All undercarriages were originally straight. All undercarriages were then Toe Out / Camber / Yaw. Straight frames are available again as an option for specific applications. There are specific rear track roller frames, minor bogies, and equalizer bars for the straight undercarriage and the Toe Out / Camber / Yaw undercarriage. The parts are not interchangeable between the two systems. All components of Toe Out / Camber / Yaw must be used to achieve results. Visually identifying Toe Out / Camber / Yaw components is difficult. An identification hole was added to straight frames that were produced as an option. Correct placement of minor bogies is important for rugged bolted joints.
Root Cause of Dry Track Joints and Procedure to Determine the Proper Corrective Action for SystemOne Undercarriage on Certain Track-Type Tractors{4150} SMCS - 4150
Track-Type Tractor: D5M (S/N: 6GN1-UP; 3CR1-UP; 7LR1-UP; 5ES1-UP; 6AS1-UP) D5N (S/N: AKD1-UP; AGG1-UP; CFH1-UP; CKT1-UP) D6M (S/N: 9ZM1-UP; 2RN1-UP; 3WN1-UP; 4JN1-UP; 5NR1-UP; 5WR1-UP; 6LR1-UP; 2YS1-UP; 4GS1-UP; 4HS1-UP) D6N (S/N: DJA1-UP; CBF1-UP; CCG1-UP; ALH1-UP; JAH1-UP; CBJ1-UP; CCK1-UP; CBL1-UP; AKM1-UP; ALR1-UP; LJR1-UP; CCS1-UP; GHS1-UP; MLW1-UP; ALY1-UP; DJY1-UP) D6R Series II (S/N: BNC1-UP; AFD1-UP; CAD1-UP; ADE1-UP; BLE1-UP; BRE1-UP; DAE1-UP; ACJ1-UP; BMJ1UP; BRJ1-UP; BMK1-UP; BNL1-UP; AEM1-UP; AFM1-UP; AGM1-UP; BPM1-UP; AEP1-UP; BPP1-UP; BPS1UP; BLT1-UP; FDT1-UP; AAX1-UP; BMY1-UP; BPZ1-UP; BRZ1-UP) D6R Series III (S/N: GJB1-UP; WCB1-UP; HDC1-UP; RFC1-UP; TBC1-UP; HCD1-UP; HKE1-UP; WRG1-UP; MTJ1-UP; DMK1-UP; JEK1-UP; EXL1-UP; JDL1-UP; DLM1-UP; LFM1-UP; LGP1-UP; DPS1-UP; GMT1-UP; MRT1-UP; EXW1-UP) D6R (S/N: 2HM1-UP; 4FM1-UP; 8TM1-UP; 9BM1-UP; 2YN1-UP; 3ZN1-UP; 4HN1-UP; 4MN1-UP; 5LN1-UP; 6JN1-UP; 7KN1-UP; 8LN1-UP; 8XN1-UP; 9MN1-UP; 9PN1-UP; DMP1-UP; 4JR1-UP; 4TR1-UP; 4WR1-UP; 5PR1-UP; 5RR1-UP; 6FR1-UP; 6GR1-UP; 6HR1-UP; 6MR1-UP; 7AR1-UP; 7DR1-UP; 7GR1-UP; 9ZS1-UP; 1RW1-UP) D6T (S/N: JHB1-UP; ZEB1-UP; SMC1-UP; JWD1-UP; LBD1-UP; LAE1-UP; DJG1-UP; WCG1-UP; WFH1-UP; LKJ1-UP; KJL1-UP; SKL1-UP; GCT1-UP; RLW1-UP; LAY1-UP; PEZ1-UP)
Introduction This Special Instruction provides the following information: • • •
A definition / explanation of the root cause for dry joints in SystemOne An after failure flow chart to determine proper corrective actions required an inspection procedure to determine the severity of bushing seal exposure
The end goal is to install the proper undercarriage components so that maximum undercarriage life is achieved.
Definition of Root Causes for Dry Joints in SystemOne There are four basic root causes for dry joints in SystemOne track: 1. Normal cartridge seal system wear-out: o 6000 hours is the nominal design life of the seal system. Seal system life can vary significantly based on application (abrasion, moisture, packing, etc.). o Typically, all joints in a track will go dry within a few hundred hours of each other. o Due to several extended joints, maximum front track roller frame extension is reached.
Ver imagen
Illustration 1
g02148306
Ver imagen
Illustration 2
Ver imagen
g02148307
Illustration 3
g02151362
2. Structural overload from severe operating conditions: o Severe uneven terrain such as rocks and tree stumps that cause high and frequent impact and torsion loading of the track. Refer to Illustration 1. o Tractors with heavy attachments such as V-blades or tractors pulling heavy implements such as plows or choppers. Refer to Illustration 2. o Improper guide guard configuration or machine operation which results in track derailing. Refer to Illustration 3. 3. Bushing seal exposure:
There are two types of bushing seal exposure: Thrust Bias Wear (TBW) and Side Slope Wear (SSW)
Ver imagen
Illustration 4
Thrust Bias Wear (1) Pivot shaft deflection (2) Tracks thrust outboard (3) Heavy wear between the center tread idler and the link. (4) Inboard bushing seal exposed to damage
Ver imagen
g02148342
Illustration 5
g02151374
Thrust Bias Wear (5) Tractor frame (inboard) (6) Track thrust (outboard) (7) Biased wear on this side of bushing (8) Exposed inboard bushing seal
a. Thrust Bias Wear (TBW) is found in the following conditions: Typically in highly abrasive soils and/or soft underfoot Predominantly on wide gauge machines (LGP and XW) On machines that make long, straight pushes with full blade loads On machines with multiple heavy attachments
Ver imagen
Illustration 6
g02148737
Side Slope Wear (9) Wear on inside link face; bushing seal exposed to damage
b. Side Slope Wear (SSW) is found in the following conditions: Tractors that run a majority of the time on steep side slopes 4. Other causes: bushings seals NOT exposed, but joints are dry prematurely o Dry joints are typically random in nature o Dry joints can be attributed to a known product problem on track built prior to 2011; cartridge design improvements have been implemented throughout 2010. o Dry joints can be caused by seal packing issues (landfill debris, heavy packing with freeze/thaw)
Determination of Proper Repair Action
Ver imagen
g02148344
Illustration 7
Inspection Procedure to Determine Bushing Seal Exposure 1. Clean the inside of the link box near the bushing on 6 to 10 consecutive joints. Skip any link boxes with dry or extended joints. The link boxes with dry or extended joints cannot be used for this inspection.
Ver imagen
Illustration 8
g02148734
(A) Outside left-side track (B) Inside left-side track (C) Inside right-side track (D) Outside right-side track
2. Is there bushing seal exposure only at locations (B) and (C) ? If, yes proceed to ""Thrust Bias Wear Bushing Seal Exposure Inspection Procedure" ". If, no proceed to ""Side Slope Wear Bushing Seal Exposure Inspection Procedure" ". Thrust Bias Wear Bushing Seal Exposure Inspection Procedure Ver imagen
Illustration 9
g02148729
Correct bushing seal exposure measurement. 1U-7234 Feeler Gauge placed flat on the link surface and measurement taken at the point on the bushing nearest the rail.
Ver imagen
Illustration 10
g02148726
Correct bushing seal exposure measurement. 4C-8733 Tapered Gauge placed flat on the link surface and measurement
taken at the point on the bushing nearest the rail.
1. Use a 1U-7234 Feeler Gauge or 4C-8733 Tapered Gauge in order to measure the inboard bushing seal exposure at locations (B) and (C). Refer to Illustration 9 if using 1U-7234 Feeler Gauge . Refer to Illustration 10 if using 4C-8733 Tapered Gauge . 2. Inboard bushing seal exposure is defined as the gap between bushing endface and the link face.
Note: Machines with normal or minimal thrust wear will not have any gaps between the bushing endface and the link face. The gap will be measurable only on machines with heavy TBW. 3. The gauge should lay flat on the link surface. The measurement should be taken at the point on the bushing that is closest to the link rail.
Ver imagen
Illustration 11
g02148723
Incorrect bushing seal exposure measurement. Joint is dry and extended. Also, feeler gauge not placed flat on the link surface, and the measurement is not taken at the point on the bushing nearest the rail.
4. Measure six adjacent joints on each track and determine the average bushing seal exposure. Do not measure joints that are extended or dry, as these joints will have abnormal wear. Refer to Illustration 11 for an example of dry or extended joints. 5. Use the following table to determine the appropriate corrective action for Thrust Bias Wear, if any. Apply the Thrust Bias Wear corrective actions in Table 2 only if:
Table 1 UC Hours
Average Bushing Seal Exposure
2000 - 3000
≥ 0.5 mm (0.020 inch)
3000 - 4000
≥ 1.0 mm (0.039 inch)
4000 - 6000
≥ 1.5 mm (0.059 inch)
If the combination of hours and bushing seal exposure do not match the criteria above, then the failure is not a result of Thrust Bias Wear and TBW Corrective Actions do not apply. Review the other causes of dry joints listed with in this document. Corrective Actions (for Thrust Bias Wear) Ver imagen
Illustration 12
g02148732
Cambered pivot shafts shown as mounted on the case and frame.
1. Install cambered pivot shafts (LGP machines only). The slight downward angle counteracts pivot shaft deflection and therefore outward track thrust.
Ver imagen
g02148721
Illustration 13
(1) Current CTI (2) Improved CTI
2. Install improved Center Tread Idlers (CTI). Modified idler thrust flange helps to prevent bushing seal exposure. Table 2 Thrust Bias Wear Corrective Actions
D5M and D5N
LGP
XL
Cambered Pivot Shaft
Reference Literature
338-9403
Special Instruction, REHS5302
Reference Literature
Improved CTI not offered
No Cambered Pivot Shaft offered
D6M and D6N
Pending LGP
D6R, D6R Series II, D6R Series III, and D6T
Improved CTI
271-6222
Special Instruction, REHS5302
XL VPAT No Cambered Pivot Shaft offered XL
323-1170
Special Instruction, REHS4393
XW VPAT XW LGP VPAT
LGP
325-8043 (1) 325-8044 (1) 325-8041 (2) 10R-9061 (2)
(1)
For use with D6R and D6R Series II
(2)
For use with D6R Series III and D6T
Service Magazine, SEPD1011 28 September, "Improved Pivot Shafts Are Now Used " and Special Instruction, REHS4385
Side Slope Wear Bushing Seal Exposure Inspection Procedure 1. Clean the inside of the link box near the bushing on 6 to 10 consecutive joints. Skip any link boxes with dry or extended joints. The link boxes with dry or extended joints cannot be used for this inspection.
Ver imagen
Illustration 14
(A) Outside left-side track
g02148731
(B) Inside left-side track (C) Inside right-side track (D) Outside right-side track
Ver imagen
Illustration 15
g02148729
Correct bushing seal exposure measurement. 1U-7234 Feeler Gauge placed flat on the link surface and measurement taken at the point on the bushing nearest the rail.
Ver imagen
Illustration 16
g02148726
Correct bushing seal exposure measurement. 4C-8733 Tapered Gauge placed flat on the link surface and measurement taken at the point on the bushing nearest the rail.
2. Use a 1U-7234 Feeler Gauge or 4C-8733 Tapered Gauge in order to measure the inboard bushing seal exposure at locations (A) & (C) and/or (B) & (D). Refer to Illustration 15 if using 1U-7234 Feeler Gauge . Refer to Illustration 16 if using 4C-8733 Tapered Gauge . 3. Inboard bushing seal exposure is defined as the gap between bushing endface and the link face.
Note: Machines with normal or minimal side slope wear will not have any gaps between the bushing endface and the link face. The gap will be measurable only on machines with heavy SSW. 4. The gauge should lay flat on the link surface. The measurement should be taken at the point on the bushing that is closest to the link rail.
Ver imagen
g02148723
Illustration 17
Incorrect bushing seal exposure measurement. Joint is dry and extended. Also, feeler gauge not placed flat on the link surface, and the measurement is not taken at the point on the bushing nearest the rail.
5. Measure six adjacent joints on each track and determine the average bushing seal exposure. Do not measure joints that are extended or dry, as these joints will have abnormal wear. Refer to Illustration 17 for an example of a dry or extruded joint. 6. Use the following table to determine the appropriate corrective action for Side Slope Wear, if any. Apply the Side Slope Wear corrective actions in Table 4 only if: Table 3 UC Hours
Average Bushing Seal Exposure
2000 - 3000
≥ 0.5 mm (0.020 inch)
3000 - 4000
≥ 1.0 mm (0.039 inch)
4000 - 6000
≥ 1.5 mm (0.059 inch)
If the combination of hours and bushing seal exposure do not match the criteria above, then the failure is not a result of Side Slope Wear and Side Slope Wear Corrective Actions do not apply. Review the other causes of dry joints listed with in this document. Corrective Actions (for Side Slope Wear) Ver imagen
g02148721
Illustration 18
(1) Current CTI (2) Improved CTI
1. Install improved Center Tread Idlers (CTI). Modified idler thrust flange helps to prevent bushing seal exposure. Table 4 Side Slope Wear Corrective Action Improved CTI
D5M and D5N
LGP
Reference Literature
Improved CTI not offered
XL D6M and D6N
Pending LGP
D6R, D6R Series II, D6R Series III, and D6T
XL VPAT
323-1170
Special Instruction, REHS4393
XL XW VPAT XW LGP VPAT LGP
Cojinete del muñón - Ajustar SMCS - 6063-025
Ver imagen
Ilustración 1
g00666217
Ajuste los cojinetes de muñón después de las primeras 100 horas de operación. 1. Baje la hoja al suelo. Vaya al lado izquierdo de la máquina. 2. Quite las dos tuercas (3) de los dos pernos (1) en el cojinete del muñón.
3. Quite los dos pernos (1), la tapa de cojinete (2) y los dos conjuntos de calces (A y B) como una unidad. 4. Saque un calce de cada conjunto de calces (A y B) . 5. Instale los dos pernos (1), la tapa de cojinete (2) y los dos conjuntos de calces (A y B) . 6. Instale las dos tuercas (3) en los dos pernos (1) . 7. Apriete las dos tuercas (3) a un par de apriete de 1.050 ± 150 N·m (775 ± 110 lb-pie). 8. Repita los pasos 2 a 7 en el lado derecho de la máquina.
Procedimiento para calzar Ver imagen
Ilustración 2
g00292740
Ejemplo típico
1. Saque todos los calces del conjunto de brazo de empuje (1) . 2. Instale el conjunto (1) y la tapa (2) en el conjunto de muñón (3) sin calces. 3. Apriete los pernos que están en la tapa (2) a un par de apriete de 50 N·m (37 lb-pie). Mantenga la misma distancia en el espacio (A) y el espacio (B) de la tapa (2). Observe los espacios (A) y (B) para determinar el número de calces necesario. 4. Afloje los pernos que están en la tapa (2). Según sea necesario, inserte calces en los espacios (A) y (B). Cuando sea posible, use un número igual de calces para los espacios (A) y (B) . Nota: El número de calces en el espacio (A) no debe diferir en más de uno del número de calces en el espacio (B). Por ejemplo, si el espacio (A) tiene ocho calces, el espacio (B) debe tener siete, ocho o nueve calces.
5. Añada un calce adicional al espacio (A). Añada un calce adicional al espacio (B) . 6. Apriete los pernos de la tapa (2) a un par de apriete de 1.050 ± 150 N·m (775 ± 110 lb-pie). 7. El conjunto se debe mover libremente en el muñón. La tolerancia mínima especificada es de 0,25 mm (0,010 pulg). Nota: Puede ser necesaria la remoción de uno o más calces después de un período corto de tiempo. El desgaste puede ser causado por las variaciones normales de la superficie o en el espesor de la pintura. 8. Realice los pasos 1 a 5 en el cojinete delantero. 9. Apriete los pernos que están en el cojinete delantero a un par de apriete de 430 ± 60 N·m (320 ± 45 lb-pie). 10. El conjunto se debe mover libremente en el muñón. La tolerancia mínima especificada es de 0,25 mm (0,010 pulg). Nota: Puede ser necesaria la remoción de uno o más calces después de un período corto de tiempo. El desgaste puede ser causado por las variaciones normales de la superficie o en el espesor de la pintura.
Posición de la rueda loca delantera - Comprobar SMCS - 4159
Tren de rodaje SystemOne La siguiente comprobación es para los trenes de rodaje SystemOne de Caterpillar que tienen una rueda guía con banda de rodadura central. Ver imagen
g01731574
Ilustración 1
1. Estacione la máquina en una superficie firme y plana. Asegúrese de que la cadena inferior esté tensa y que la garra que se va a medir se apoya directamente debajo del eje de la rueda guía de la cadena. 2. Mida la altura (A, B) desde la superficie del terreno plano hasta la punta de la garra que está centrada bajo el eje de la rueda guía de la cadena. 3. Mantenga la altura de la garra (elevada) a las siguientes dimensiones. a. (A) Ruedas guía delanteras Mínimo - 0 mm (0 pulg) Máxima - 45 mm (1,77 pulg) b. (B) Ruedas guías traseras Mínima - 10 mm (0,4 pulg) Máxima - 60 mm (2,36 pulg) 4. Repita los pasos 1 a 3 para determinar la altura apropiada debajo de cada rueda guía. 5. Si hay excesos de vibración luego de que el desgaste del tren de rodaje en el sistema de transmisión y sistema de rodillos exceda el 100 por ciento para máquinas con el tren de rodaje SystemOne,
agregue calces debajo de los soportes basculantes para bajar los rodillos y elevar las ruedas guías, según sea necesario. Consulte a su distribuidor Caterpillar para obtener información detallada sobre los ajustes de la rueda guía con banda de rodadura central. Para obtener más información sobre los ajustes de cadena necesarios, consulte el Manual de Operación y Mantenimiento, "Cadena - Comprobar/Ajustar". ReferenciaConsulte el Manual de Operación y Mantenimiento, "Material de referencia" para informarse sobre las publicaciones y las Instrucciones Especiales referentes al desmontaje e instalación de la cadena SystemOne, cuando sea necesario.
Ruedas guia con banda de rodadura central o diseño convencional Ver imagen
Ilustración 2
g01731594
(A) Ajuste de calces (B) Dimensión entre la altura de la llanta de la rueda guía delantera y la altura de la llanta del rodillo
La siguiente comprobación es para los sistemas de trenes de rodaje con cualquiera de los diseños de la la rueda guía. La altura de la llanta de la rueda guía delantera debe ser siempre más alta que la altura de la llanta del rodillo. La dimensión (B) se fija en la fábrica aproximadamente entre 25 mm (1 pulg) a 37 mm (1,5 pulg). La dimensión (B) disminuye a medida que el tren de rodaje se desgasta. Si se instala una rueda guía reconstruida o una rueda guía nueva con rodillos inferiores desgastados, la dimensión (B) disminuye.
El ajuste de la rueda guía delantera a la altura correcta puede mejorar la suspensión del tractor y el rendimiento de la hoja topadora. Utilice el siguiente procedimiento para determinar la mejor posición de operación. Si la máquina se opera en condiciones de SUELO FIRME y hay excesos de vibraciones, se pueden agregar calces debajo de los soportes basculantes para levantar la rueda guía delantera. También, al agregar calces debajo de los soportes basculantes, los rodillos bajan. Si se opera la máquina en condiciones de SUELO BLANDO, se pueden quitar calces que se encuentran debajo de los soportes basculantes para elevar los rodillos. También, al quitar los calces que se encuentran debajo de los soportes basculantes las ruedas guías bajan. Al bajar la rueda guía delantera se puede mejorar el rendimiento de la hoja. Si la hoja produce ondulaciones del terreno o si se notan demasiadas vibraciones en el material blando, se pueden colocar calces para levantar la rueda guía delantera. Consulte a su distribuidor Caterpillar para obtener información detallada sobre la forma de comprobar y ajustar la rueda guía.
Producto: TRACK-TYPE TRACTOR Modelo: D8T TRACK-TYPE TRACTOR J8B Configuración: D8T TRACK-TYPE TRACTOR J8B00001-UP (MACHINE) POWERED BY C15 Engine
GRAFICO #1 g01523593
D8T TRACK-TYPE TRACTOR, Powered By C15 Engine Número de medio - SEBP4195-51 | Fecha de publicación 01/08/2010 | Fecha de actualización - 19/08/2010 i03021830
310-2920 TRACK ADJUSTER & RECOIL GP -SYSTEMONE S/N J8B1-2203; J8B2214-UP PART OF 310-2848, 310-2849, 310-2850 UNDERCARRIAGE AR ALSO AN ATTACHMENT
GRUPO ENTERO Ref. Cant. NPR Nota
No. de pieza
Nombre de la pieza
Grp
NPR
TRACK ADJUSTER & RECOIL GP SYSTEMONE
310-2920
PIEZAS INDIVIDUALES Ref. Cant. NPR Nota
No. de pieza
Cant. Nombre de la pieza req.
1
NPR
1L-5081
2
SPACER (0.41X0.75X0.56-IN THK)
2
NPR
1M-1571
4
RING-WEAR
3
NPR
2S-5926
2
VALVE-RELIEF
4
NPR
7T-4200
2
COVER
5
NPR
7T-4213
4
STOP
6
NPR
8T-2185
2
SEAL-U-CUP
7
NPR
9W-6074
2
RETAINER
8
NPR
104-6372
2
PLATE
9
NPR CL
190-8609
2
VALVE-FILL
CL
NPR
360-2288
1
10
NPR
199-8188
2
PISTON
11
NPR
199-8194
2
RETAINER
12
NPR
199-8202
2
CYLINDER AS
13
NPR
199-8211
2
CABLE AS
VLV-FILL-CLA
(EACH INCLUDES) NPR
1P-7405
1
EYEBOLT (3/8-16-THD)
14
NPR
314-7924
2
TUBE
15
NPR
314-7925
2
SPRING
16
NPR
5S-7382
2
BOLT (3/8-16X1.375-IN)
17
NPR
6J-1038
4
SEAL-O-RING
18
NPR
6J-3991
8
BOLT-12 POINT HEAD (3/4-10X1.5IN)
19
NPR
6V-8801
2
NUT (3/8-16-THD)
20
NPR
8H-8830
2
RING-RETAINING
21
NPR
8T-4223
4
WASHER-HARD (13.5X25.5X3-MM THK)
22
NPR
8T-4835
4
BOLT (1/2-13X2-IN)
23
NPR
8T-4897
2
WASHER (10.2X35X6-MM THK)
Abreviaturas: CL - Pieza Classic disponible
Tracks - SystemOne Track SMCS - 4170 Número de pieza - 304-5688
Specifications Ver imagen
Illustration 1
g01437066
For instructions on field repair of SystemOne Track, refer to Undercarriage Reconditioning Bulletin, SEBF9100, "Field Repair of SystemOne Track". Maximum track press assembly force ... 660 kN (148,500 lb) (1) Torque for bolts that hold the half links together ... 650 ± 70 N·m (480 ± 50 lb ft) Note: Tighten the bolts by an additional 120 degree turn. Note: Apply 4C-5593 Anti-Seize Compound to the threads, to the body, and to the washer face of each bolt that holds the half links together. (2) The shoe that is mounted to the SystemOne master link is not interchangeable with the other shoes on the track. The mounting bolt holes are in a slightly different position. (3) Torque for bolts that hold track shoes to links ... 650 ± 70 N·m (480 ± 50 lb ft) Note: Apply SAE 30W oil to the bolt threads and the washer faces of each bolt before installation. Note: Tighten the bolts by an additional 120 degree turn. (4) Grouser Height New grouser height (extreme service) ... 93 mm (3.66 inch)
(5) Link Height Height of an unused link ... 152 ± 0.5 mm (5.98 ± 0.02 inch) (6) Distance from the center of one pin to the center of the next pin (pitch) ... 218 ± .0625 mm (8.5827 ± 0.0025 inch) Ver imagen
Illustration 2
g01437111
(7) Extension of pin at each end of the track link box ... 41.073 ± 0.3 mm (1.617 ± 0.012 inch) (8) Distance between the centerlines of the bolt holes for the track shoes ... 173.5 ± 0.39 mm (6.83 ± 0.015 inch) (8) Distance between the centerlines of the bolt holes for the master link ... 200 ± 0.39 mm (7.87 ± 0.015 inch) (9) Depth of the plug from the face of the pin ... 8 ± 4 mm (0.32 ± 0.16 inch) (10) Bushings
Diameter of a new bushing ... 83.75 mm (3.30 inch) (11) Distance between the links ... 1.50 mm (0.059 inch) (12) Extension of pin at each end of the link assembly ... 3.6 ± 0.1 mm (0.142 ± 0.004 inch) Note: This dimension is measured from the spotface on the link to the end of the pin.
Servicio super extremo (SES) Las zapatas han cambiado en algunos tractores de cadenas y tiendetubos SMCS - 4172
Tiendetubos: 587R (N/S: BXL1-Y SIG) 587T (N/S: FAT1-Y SIG) Tractor de Cadenas: D8N (N/S: 9TC1-Y SIG; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG) D8Rserie II (N/S: AKA1-Y SIG; 6YZ1-Y SIG) D8R (N/S: 7XM1-Y SIG; 9EM1-Y SIG) D8T (N/S: J8B1-Y SIG; KPZ1-Y SIG) La geometría de la sección cruzada de cadena SES ha cambiado en las siguientes máquinas: D8N, D8R, D8R serie II, D8T, 587R y 587T. Ver imagen
g02051234
Ilustración 1 Nueva zapata de cadenas SES Ver imagen
g02051237
Ilustración 2 Zapata de cadenas SES anterior
La nueva zapata tiene un radio en el borde de arrastre. La zapata anterior tiene un borde de arrastre plano. Es aceptable usar los dos tipos de zapatas en la misma cadena. Este procedimiento es adaptable a todas las máquinas indicadas anteriormente. Los semiejes nuevos son reemplazo directo de los semiejes anteriores. Tabla 1 Zapata de cadenas SES Máquina
D8T, D8R serie II, D8R y D8N
587T y 587R
Tipo de zapata
Número de pieza antiguo
Número de pieza nuevo
610 mm (24 pulg) SES
115-1385
317-1030
660 mm (26 pulg) Trampa SES
330-7672
317-1031
865 mm (34 pulg) SES recortadas
306-9460
317-1033
Las zapatas con agujeros de retención se han cambiado para resistir el agrietamiento en algunos tractores de cadenas SMCS - 4170
Tractor de Cadenas: D7Hserie II (N/S: 2SB1-Y SIG.; 4AB1-Y SIG.; 5WB1-Y SIG.; 5BF1-Y SIG.; 2RG1-Y SIG.; 3XG1-Y SIG.; 4FG1-Y SIG.; 79Z1-Y SIG.; 80Z1-Y SIG.; 82Z1-Y SIG.) D7H (N/S: 77Z1-Y SIG.) D7Rserie II (N/S: AEC1-Y SIG.; AFG1-Y SIG.; ABJ1-Y SIG.; BPK1-Y SIG.; BNM1-Y SIG.; BRM1-Y SIG.; AGN1-Y SIG.; BRP1-Y SIG.; ACS1-Y SIG.; BPT1-Y SIG.; ADW1-Y SIG.; BNX1-Y SIG.) D7R (N/S: 9HM1-Y SIG.; 2EN1-Y SIG.; 3DN1-Y SIG.; 2HR1-Y SIG.; 3ZR1-Y SIG.; 4SR1-Y SIG.; 5MR1-Y SIG.; 6ER1-Y SIG.; 5KZ1-Y SIG.) D8N (N/S: 9TC1-Y SIG.; 1XJ1-Y SIG.; 5TJ1-Y SIG.; 7TK1-Y SIG.) D8Rserie II (N/S: AKA1-Y SIG.; 6YZ1-Y SIG.) D8R (N/S: 7XM1-Y SIG.; 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) Ver imagen
Ilustración 1 Geometría del agujero de retención anterior (A) 17 mm (0,669 pulg) Ver imagen
g02023165
g02023167
Ilustración 2 Geometría del agujero de retención nuevo (B) 24 mm (0,945 pulg)
La forma de la apertura en las zapatas del agujero (de retención) trapezoidal ha cambiado en las zapatas de los D7H, D7H serie II, D7R, D7R serie II, D8N, D8R, D8R serie II y D8T. El nuevo diseño usa una geometría modificada de la apertura trapezoidal cerca de los agujeros para los pernos para resistir el agrietamiento de las zapatas de cadenas en esta área. El nuevo diseño tiene 24 mm (0,945 pulg) de material entre el agujero para el perno y el agujero de retención, como se muestra en la ilustración 2. El diseño anterior tenía 17 mm (0,669 pulg) de material entre el agujero para el perno y el agujero de retención, como se muestra en la Ilustración 1. La nueva apertura para la zapata también tiene una forma ligeramente diferente, pero aproximadamente la misma área que la zapata anterior para permitir que el material adherido pueda expulsarse. Las nuevas zapatas son adaptables a todas las máquinas indicadas anteriormente. Tabla 1 Zapatas con agujeros trapezoidales de los D7H, D7H serie II, D7R y D7R serie II Número de pieza nuevo
Número de pieza anterior
330-7667
9Z-9261
330-7668
9Z-9265
330-7669
1Q-4946
330-7670
131-4835
330-7671
127-0964
Descripción de la zapata de cadenas 560 mm (22 pulg) Orificio ES 610 mm (24 pulg) Orificio ES 660 mm (26 pulg) Orificio ES 760 mm (30 pulg) Orificio ES 915 mm (36 pulg) Orificio ES
Nota: Las zapatas de los D7H, D7H serie II, D7R y D7R serie II MS no necesitan el cambio de diseño.
Tabla 2 Zapatas con agujeros trapezoidales de los D8N, D8R, D8R serie II y D8T Número de pieza nuevo
Número de pieza anterior
329-9268
1Z-9417
329-9269
1Z-9422
329-9270
9W-5541
330-0581
271-7532
330-0582
172-6564
329-9271
1Z-9983
329-9272
1Z-9960
329-9273
6T-7405
329-9818
1Z-9425
330-0583
139-2609
330-0580
138-9470
330-7672
312-6430
Pasadores de cadena - Inspecccionar SMCS - 4175-040-PN
Descripción de la zapata de cadenas 560 mm (22 pulg) Orificio ES 610 mm (24 pulg) Orificio ES 660 mm (26 pulg) Orificio ES 700 mm (28 pulg) Orificio ES 965 mm (38 pulg) Orificio ES 560 mm (22 pulg) Orificio ES 610 mm (24 pulg) Orificio ES 660 mm (26 pulg) Orificio ES 710 mm (28 pulg) Orificio ES Agujero de retención MS de 810 mm (32 pulg); con pinzas 965 mm (38 pulg) Orificio ES 660 mm (26 pulg) Orificio SES
Se pueden producir quemaduras en los dedos debido a pasadores y bujes calientes. Los pasadores y los bujes de una articulación seca pueden calentarse excesivamente. Es posible quemarse los dedos si se produce un contacto más que breve con estos componentes. Utilice las recomendaciones para prolongar la duración del tren de rodaje. Utilice las recomendaciones para evitar el exceso de paradas de la máquina. Ver imagen
g01021628
Ilustración 1
1. Durante la operación de la máquina, preste atención a los chirridos o rechinamientos fuera de lo usual. Esto puede indicar una junta reseca. 2. Inspeccione la máquina semanalmente para ver si hay juntas secas. Inmediatamente después de operar la máquina, compruebe para ver si hay juntas secas. Después de operar la máquina, golpee ligeramente el extremo de cada pasador o buje de la cadena. Toque el pasador de cadena o el buje con el dorso de la mano. Marque cualquier junta de pasador de cadena seca que esté muy caliente al tocarla. 3. No golpee los extremos de los pasadores de cadena con un marrón para aflojar las juntas.
ATENCION
Golpear el extremo de un pasador de cadena introduce una cantidad significativa de juego axial en la junta de cadena y puede resultar en averías prematuras. Consulte con el experto del Servicio de Cadenas de su distribuidor Caterpillar si detecta fugas o juntas secas. El experto del Servicio de Cadenas de su distribuidor Caterpillar puede efectuar una inspección de las cadenas de su máquina.
Tracks SMCS - 4169; 4170
SystemOne Track Ver imagen
Illustration 1 Track link box (1) Track link (2) Cartridge Ver imagen
g01436529
Illustration 2
g01436557
Track Assembly (3) Inner track link (4) Outer track link
SystemOne track assembly has links (1) and cartridges (2). The new design of the cartridge takes the place of the former pin, the bushing, and the seal components. The cartridge contains the oil for the track joint. The cartridge is sealed and lubricated for life. The cartridge is a nonserviceable part. The cartridges are serviced only as a track link box. This servicing of only the track link box ensures that the critical alignment that is required of the inner links on the cartridges is correct. The track link boxes are connected by outer links (4). The outer links (4) are rotated 180° from the inner links (3) . The new SystemOne track uses a straight track link design. This makes the link stronger and the straight link gives the link a greater ability to carry tough loads. The inner links look like the outer links but the inner links have additional wear material. The outer links also have a groove along the bottom of the outboard side of the link. The wear material is in specific locations in order to reduce thrust wear. The outer links are serviced individually. The inner links are serviced by replacing the track link boxes. Ver imagen
g01436631
Illustration 3 (5) Master link
The new SystemOne undercarriage uses a master link (5) that is similar to the standard track. The master links have serrated teeth in order to allow quick disassembly. The master link is taken apart by removing the four master link bolts and removing the track shoe. After the shoe has been removed, the halves of the master link can be taken apart. The shoe that is mounted to the SystemOne master link is not interchangeable with the other shoes on the track. The other shoes on the track are not interchangeable with the shoe that is mounted to the master link. The mounting bolt holes are in slightly different positions.
Track - Adjust SMCS - 4197-025
Procedure
Grease is under high pressure. Grease coming out of the relief valve under pressure can penetrate the
body causing injury or death. Do not watch the relief valve to see if grease is escaping. Watch the track or track adjustment cylinder to see if the track is being loosened. Loosen the relief valve only one turn.
Move the machine forward. Allow the machine to stop without the use of the service brakes. Adjust the tracks while you are in the machine's typical operating conditions. If packing conditions prevail on the workplace, the tracks should be adjusted with packing material.
Ver imagen
Illustration 1
g00040329
If a machine does not have carrier rollers, the sag in the track is measured between the sprocket and front idler (2).
Ver imagen
g00104000
Illustration 2
If the machine is equipped with a carrier roller, calculate the average of dimension (3) and dimension (4) . Standard Track Table 1 Track Sag for Standard Track
No Carrier Roller (2)
Carrier Roller (3) and (4)
Minimum
Target
Maximum
105 mm (4.1 inch)
115 mm (4.5 inch)
125 mm (4.9 inch)
55 mm (2.2 inch)
65 mm (2.6 inch)
75 mm (3 inch)
SystemOne Track Table 2 Track Sag for SystemOne Track
No Carrier Roller (2)
Carrier Roller (3) and (4)
115 ± 10 mm (4.5 ± 0.4 inch)
65 ± 10 mm (2.6 ± 0.4 inch)
If the tractor is used in a sprocket jump application 100 ± 10 mm (4.0 ± 0.4 inch)
If the tractor is used in a sprocket jump application 60 ± 10 mm (2.4 ± 0.4 inch)
If the tractor is used in a severe sprocket jump application 90 ± 10 mm (3.5 ± 0.4 inch)
If the tractor is used in a severe sprocket jump application 55 ± 10 mm (2.2 ± 0.4 inch)
Loose Track Adjustment Ver imagen
g00680166
Illustration 3
NOTICE Do not attempt to tighten track when dimension (1) is 152 mm (6.0 inch) or more. Contact your Caterpillar dealer for track service or instructions.
1. Remove the access cover.
Ver imagen
Illustration 4
g00689385
2. Add multipurpose grease (MPGM) through track adjustment valve (5). Add the MPGM until dimension (2) is correct. 3. Operate the machine back and forth in order to equalize the pressure. Allow the machine to coast to a complete stop. Do not use the brakes. 4. Remeasure dimension (2). If dimension (2) is less than 115 ± 10 mm (4.5 ± 0.4 inch), repeat Steps 2 and 3 until dimension (2) is correct.
Note: If your machine is equipped with a carrier roller, use the average of dimension (3) and (4) . 5. Install the access cover. Tight Track Adjustment 1. Remove the access cover.
Ver imagen
Illustration 5
g00689386
2. Loosen relief valve (6) by one turn of 360 degrees. Allow the grease to escape. 3. Close the relief valve. 4. Add MPGM through track adjustment valve (5). Add grease until dimension (2) is correct. 5. Operate the machine back and forth in order to equalize the pressure. Allow the machine to coast to a complete stop. Do not use the brakes. 6. Remeasure dimension (2). If dimension (2) is less than 115 ± 10 mm (4.5 ± 0.4 inch), repeat Steps 4 and 5 until dimension (2) is correct. 7. Install the access cover.
Track Roller Frame SMCS - 4151 Número de pieza - 310-2847 Número de pieza - 310-2851 Ver imagen
Illustration 1
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(1) Apply a light coat of the lubricant that is being sealed to the O-ring seal and the bore. (2) Torque for bolts that hold the plate on the end of the pivot shaft ... 270 ± 40 N·m (200 ± 30 lb ft) (3) Torque for the plug ... 120 ± 10 N·m (90 ± 7.5 lb ft) Note: First ensure that plate (2) is installed. Then install plug (3) . Note: Apply a light coat of the lubricant that is being sealed to the O-ring seal. (4) Clean all mating surfaces with a degreaser. Wipe all mating surfaces with a clean cloth in order to remove debris. Put 6V-6640 Sealant on the mating surfaces before seal installation. (5) Apply a light coat of the lubricant that is being sealed to the bore. (6) Torque for the bolts that hold the cover for the pivot shaft to the track roller frame ... 40 ± 5 N·m (30 ± 3.7 lb ft) (7) Apply a light coat of the lubricant that is being sealed to the O-ring seals.
Cambios en el bastidor de rodillos inferiores en los Tractores SMCS - 4151; 4158; 4192; 7169
Tractor de Cadenas: D8R (N/S: 9EM1-Y SIG.) D8T (N/S: J8B1-Y SIG.; KPZ1-Y SIG.) Service Magazine, SSPD1032, 6 noviembre 2009, "Cambios en el bastidor de rodillos inferiores en los Tractores de Cadenas D8R y D8T: Orificio del eje pivote de comba solo; protectores de rueda guía de la cadena; soportes basculantes grandes para SystemOne; resorte tensor y tubo de tope". Haga caso omiso de este artículo. Consulte el artículo de reemplazo siguiente. Description of Change: Se han hecho cambios en los bastidores de rodillos inferiores traseros, los protectores de rueda guía de la cadena, los soportes basculantes grandes y el resorte tensor y el tubo de tope.
Bastidores traseros de los rodillos inferiores Ver imagen
Ilustración 1
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Los bastidores de rueda motriz traseros con orificios para eje pivote con comba solamente ahora son estándar en los tractores que se envían desde fábrica. Los orificios del eje pivote están levemente inclinados para compensar la deformación hacia arriba del eje pivote bajo carga. Sin comba, las cadenas pueden desplazarse hacia fuera del tractor. Gracias a la comba, las cadenas pasan mejor por entre los
rebordes de los rodillos y las guías de las cadenas, lo que permite un menor desgaste externo. Los bastidores traseros de los rodillos inferiores con comba solo se identifican por tener dos agujeros taladrados en el lado externo de los patines de la cadena, como se muestra en la Ilustración 1.
Protectores de rueda guía de la cadena Ver imagen
Ilustración 2
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Perno trasero antiguo en los protectores y raspadores de caucho Ver imagen
Ilustración 3
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Nuevo protector de rueda guía trasera con placa soldada
El perno antiguo en los protectores de rueda motriz trasera y los protectores de raspadores de caucho flexibles se han cambiado a placas soldadas. Refiérase a las ilustraciones 2 y 3. Ver imagen
Ilustración 4
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Rascadores de caucho delanteros antiguos Ver imagen
Ilustración 5
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Nuevo protector de rueda guía delantera con placa soldada
Los protectores de raspadores flexibles antiguos para la rueda guía delantera ya no se usan. El protector delantero ahora es una placa soldada. Refiérase a las ilustraciones 4 y 5.
Soportes basculantes grandes Ver imagen
Ilustración 6
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Soporte basculante grande del tren de rodaje estándar con una rueda guía convencional Ver imagen
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Ilustración 7
Soporte basculante grande del tren de rodaje SystemOne con una Rueda guía con banda de rodadura central (CTI) y perno en el protector inferior para resistir la adherencia de materiales. Ver imagen
Ilustración 8
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Soporte basculante grande del tren de rodaje SystemOne con una rueda guía convencional y placa de cubierta
Se usan los nuevos bastidores de soportes basculantes grandes trasero y delantero compatible sólo con la cadena SystemOne Los nuevos bastidores de soportes basculantes colocan el eje de la rueda guía en la posición correcta para usar con la cadena SystemOne. Los bastidores también aceptan pernos en los protectores de rueda guía inferior para reducir el flujo de material y la adherencia de materiales en la cadena en la CTI. El perno en los protectores inferiores no pueden usarse con ruedas guías convencionales. Las ruedas guía convencionales se usan con los soportes basculantes grandes SystemOne en medio ambientes de mucha adherencia de materiales para reducir al mínimo la adherencia en el sistema de resorte tensor. Las ruedas guia convencionales también se usan con los soportes basculantes grandes de SystemOne para reducir las emisiones de ruido del tren de rodaje.
Resorte tensor y tubo de tope Ver imagen
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Ilustración 9 (1) Tubo de tope (2) Resorte tensor
El sistema de resorte tensor y de ajustador de cadena utiliza ahora un resorte y un tubo de tope más grandes para proporcionar 12 mm (0,472 pulg) más de desplazamiento del resorte tensor. El nuevo resorte y tubo de tope deben usarse siempre juntos como un conjunto. Lo mismo aplica para el resorte y tubo de tope anteriores. No mezcle las piezas nuevas y las anteriores Adaptable To: Los cambios en los bastidores de rodillos inferiores, protectores de rueda guía y soportes basculantes grandes están vigentes con las siguientes máquinas: • •
D8R (N/S: 9EM5225-Y SIG.) D8T (N/S: J8B2206-Y SIG.; KPZ3500-Y SIG.)
Los cambios en los bastidores de rodillos inferiores traseros, los protectores de rueda motriz y los soportes basculantes grandes son adaptables a las máquinas siguientes: • •
D8R (N/S: 9EM1-5224) D8T (N/S: J8B1-2205; KPZ1-3499) Tabla 1 Bastidor trasero de rodillos inferiores
Número de pieza nuevo
Número de pieza anterior 237-8210
310-2888 310-2872 237-8211 310-2889 310-2873
Descripción Conjunto de bastidor de rodillos inferiores del lado derecho (Tren de rodaje estándar) Conjunto de bastidor de rodillos inferiores del lado izquierdo (Tren de rodaje estándar)
310-2886
310-2870
Conjunto de bastidor de rodillos inferiores del lado derecho (Tren de rodaje SystemOne)
310-2887
310-2871
Conjunto de bastidor de rodillos inferiores del lado izquierdo (Tren de rodaje SystemOne) Tabla 2 Soportes basculantes grandes del D8
Tren de rodaje del D8 estándar
D8 SystemOne de fábrica
D8 SystemOne modificado
Descripción
9W-7417 (1)
9W-7417 (1)
Bastidor de soporte basculante grande delantero
310-2905 310-2901
(2)
310-2901
9W-7416 (1)
(2)
9W-7416 (1)
Bastidor de soporte basculante grande trasero
310-2906 310-2902 (2) (1) (2)
310-2902 (2)
Usa pernos de montaje de taco de soporte basculante de 7/16 pulg. Usa pernos de montaje de taco de soporte basculante de 1/2 pulg.
Tabla 3 Protectores inferiores CTI de SystemOne del D8T Número de pieza
Descripción
Notas
310-2910
Protector de rueda guía (INFERIOR, EXTERIOR)
Grupo de protector exterior es parte del accesorio de SystemOne
310-2911
Protector de rueda guía (INFERIOR, INTERIOR)
El grupo de protector interior es un accesorio separado
310-2909
Plancha
8T-4994
Arandela dura
8T-9398
Perno
Placa de la tapa y la tornillería para proteger los orificios roscados en el soporte basculante grande si los protectores no se usan.
Los cambios del resorte tensor y del tubo de tope están vigentes con las siguientes máquinas: • •
D8R (N/S: 9EM5250-Y SIG.) D8T (N/S: J8B2214-Y SIG.; KPZ2780-Y SIG.) Tabla 4 Resorte tensor y tubo de tope
Número de pieza nuevo
Número de pieza anterior
Descripción
314-7924
199-8187
Tubo
314-7925
199-8186
Resorte
Bastidor de rodillos inferiores - Inspeccionar
SMCS - 4151-040
Ver imagen
Ilustración 1
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Inspeccione para ver si hay fugas en el bastidor de rodillos inferiores (3). Vea si hay fugas de aceite en el sello del eje pivote (2). Vea si hay fugas en las ruedas tensoras (1) y los rodillos inferiores (4). Inspeccione el sello del resorte amortiguador (5) para detectar si hay fugas de aceite.
Guías de bastidor de rodillos inferiores - Inspeccionar SMCS - 4177-040
Mida el movimiento de rotación del bastidor de rodillos delantero con respecto al bastidor trasero. Ver imagen
Ilustración 1
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Se han quitado algunos componentes para mayor claridad.
1. Levante la parte delantera de la máquina con la hidráulica de la hoja topadora. Coloque un bloque de 100 mm (4 pulg) debajo del borde exterior de la garra de una zapata de cadena. Ponga el bloque cerca de la rueda tensora. Baje la máquina sobre el bloque. Ver imagen
Ilustración 2
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2. Utilice un lápiz de grasa para hacer una marca en la sección tubular del bastidor de rodillos delantero. Haga una marca en la parte trasera del bastidor de rodillos. Esta marca debe corresponder con la marca que está en la sección tubular. Ver imagen
Ilustración 3
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Se han quitado algunos componentes para mayor claridad.
3. Levante la parte delantera de la máquina con la hidráulica de la hoja topadora. Coloque el bloque debajo del borde interior de la garra de la misma zapata de cadena. Baje la máquina sobre el bloque. Ver imagen
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Ilustración 4
4. Ponga una marca en la sección tubular del bastidor de rodillos delantero. Esta marca debe corresponder con la marca en el bastidor de rodillos trasero. Mida la distancia entre las dos marcas en el bastidor de rodillos delantero. Si la distancia entre las dos marcas es mayor de 4,5 mm (0,18 pulgada), inspeccione las guías del bastidor de rodillos para ver si están desgastadas. Repita todo el procedimiento para el otro lado de la máquina.
ATENCION No acreciente nunca las guías del bastidor de rodillos inferiores con soldaduras de recrecimiento duro. Esto producirá daños importantes de desgaste en las ranuras de las guías en el bastidor delantero de rodillos inferiores. Ver imagen
Ilustración 5
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Si la dimensión (X) es menor de 45,3 mm (1,78 pulg), reemplace las guías del bastidor de rodillos inferiores. Consulte a su distribuidor Caterpillar para obtener información o servicio.
Calces de montaje del motor y barra estabilizadora - Inspeccionar SMCS - 1152-040; 7206-040
Calces de montaje del motor Caterpillar recomienda inspeccionar los montajes del motor para ver si hay deterioro. Esto impedirá la vibración excesiva del motor causada por el montaje inapropiado.
Pasadores de extremo de la barra compensadora
Se pueden producir lesiones personales y accidentes mortales si no se sigue el procedimiento apropiado o no se usan las herramientas recomendadas. Para evitar la posibilidad de accidentes graves o mortales, siga el procedimiento apropiado y utilice las herramientas recomendadas.
ATENCION La máquina debe estar estacionada en una superficie horizontal antes de realizar este procedimiento.
Se pueden producir lesiones personales y accidentes mortales si no se sigue el procedimiento apropiado o no se usan las herramientas recomendadas. Para evitar la posibilidad de accidentes graves o mortales, siga el procedimiento apropiado y utilice las herramientas recomendadas.
ATENCION La máquina debe estar estacionada en una superficie horizontal antes de realizar este procedimiento. Nota: Hay que quitar de la barra compensadora todo el peso de la máquina. La barra compensadora tiene que tener movimiento libre para ser medida. Para ver si hay movimiento o desgaste anormal en el pasador de extremo de la barra compensadora, efectúe los siguientes pasos. Ver imagen
Ilustración 1
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1. Limpie las áreas alrededor del pasador de extremo con un sistema de lavado de alta presión. Inspeccione el estado del sello. 2. Vea si hay fugas de aceite y si el sello está en posición neutral. 3. Compruebe el aceite en ambas uniones de pasador de extremo. Ver imagen
Ilustración 2
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4. Posicione un indicador de dial en el soporte del pasador en el bastidor de rodillos. Fije la sonda del indicador de dial en la parte superior de la barra compensadora. Ajuste el indicador de dial a cero. Ver imagen
g01108798
Ilustración 3
5. Ponga un gato hidráulico de 55 toneladas en posición debajo del extremo de la barra compensadora. 6. Levante la barra compensadora con el gato y anote la lectura del indicador de dial para determinar la cantidad de desgaste. Nota: Programe la reparación de la unión del pasador de extremo si la lectura en el indicador de dial excede de 1,50 mm (0,059 pulg). 7. Repita la inspección y el procedimiento de medición para el otro extremo de la barra compensadora y su pasador del extremo. Consulte a su distribuidor Caterpillar para una inspección y para obtener instrucciones de reparación.
Pasador central de la barra compensadora
Se pueden producir lesiones personales y accidentes mortales si no se sigue el procedimiento apropiado o no se usan las herramientas recomendadas. Para evitar la posibilidad de accidentes graves o mortales, siga el procedimiento apropiado y utilice las herramientas recomendadas.
ATENCION La máquina debe estar estacionada en una superficie horizontal antes de realizar este procedimiento.
Se pueden producir lesiones personales y accidentes mortales si no se sigue el procedimiento apropiado o no se usan las herramientas recomendadas. Para evitar la posibilidad de accidentes graves o mortales, siga el procedimiento apropiado y utilice las herramientas recomendadas.
ATENCION La máquina debe estar estacionada en una superficie horizontal antes de realizar este procedimiento. Nota: Se debe quitar de la barra compensadora todo el peso de la máquina. La barra compensadora debe tener movimiento libre para medir el juego vertical del orificio para el pasador. Para ver si está flojo o si hay desgaste anormal en el pasador central de la barra compensadora, realice los siguientes pasos. Ver imagen
Ilustración 4
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1. Limpie las áreas que están alrededor del pasador central y de la barra compensadora. Ver imagen
Ilustración 5
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2. Ponga un gato hidráulico de 55 toneladas en posición debajo del bastidor principal, como se muestra. Ver imagen
Ilustración 6
g01108804
3. Posicione un indicador de dial en la barra compensadora y coloque la sonda del indicador de dial debajo del centro del bastidor para el pasador. Ajuste a cero el indicador de esfera.
4. Levante con el gato la parte delantera de la máquina hasta que el peso de los bastidores de rodillos quede soportado en la barra compensadora. 5. Anote la lectura del indicador de dial para determinar la cantidad de desgaste en el pasador y el cojinete. Nota: Programe la reparación de la unión del pasador central si el movimiento excede de 2,54 mm (0,100 pulg). Consulte a su distribuidor Caterpillar para una inspección y para obtener instrucciones de reparación.
Tacos de la barra compensadora Ver imagen
Ilustración 7
g01108806
Los tacos de la barra compensadora están debajo del protector delantero, en la parte inferior de la máquina. Inspeccione los tacos de la barra compensadora para ver si la goma está agrietada o si les faltan pedazos de goma. Consulte a su distribuidor Caterpillar sobre las piezas de repuesto y las instrucciones para hacer el reemplazo.
Pasador central de la barra compensadora - Medir SMCS - 7206-040-PN ; 7206-082; 7207-086-PN
Ver imagen
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Ilustración 1 Vista trasera
Para ver si está flojo o si hay desgaste anormal en el pasador central de la barra compensadora, realice los siguientes pasos. Nota: Se debe quitar de la barra compensadora todo el peso de la máquina. La barra compensadora debe tener movimiento libre para medir el juego vertical del orificio para el pasador. 1. Limpie la zona alrededor del pasador central con una unidad de lavado de alta presión. Ver imagen
Ilustración 2 Vista frontal
g00736127
2. Instale un indicador de esfera y mida el juego vertical en la unión del pasador central. Nota: Programe la reparación de la junta del pasador central si movimiento excede 2,54 mm (0,100 pulg). Consulte a su distribuidor Caterpillar para una inspección y para obtener instrucciones de reparación.
Nivel de aceite de los pasadores de extremo de la barra compensadora - Comprobar SMCS - 7206-535
ATENCION Aplique aceite de engranajes a través de las conexiones con una bomba de lubricación manual o con una pistola de engrase adecuada. El uso de equipo de lubricación operado a presión daña los sellos.
ATENCION Antes y después de llenar el pasador de extremo de la barra compensadora con aceite de engranajes, el sello (1) debe estar a ras con la barra compensadora. Si los sellos no están a ras, se pueden causar daños a los sellos a causa de un llenado excesivo. Ver imagen
Ilustración 1 Ver imagen
g00586840
Ilustración 2
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1. Limpie las áreas alrededor del pasador de extremo con un sistema de lavado de alta presión. Inspeccione el estado del sello (1) . 2. Compruebe si hay fugas de aceite en esa zona. Asegúrese de que el sello esté en una posición neutral. 3. Quite el tapón (2) . 4. Compruebe el nivel de aceite. El nivel del aceite (4) debe estar en la parte superior de la cabeza hexagonal de la conexión. 5. Si el nivel del aceite es bajo, aplique aceite para engranajes por la grasera (3) hasta que el aceite para engranajes alcance el nivel del aceite (4) en la parte superior de la cabeza hexagonal de la conexión. Elimine el exceso de aceite. Esto mantendrá un volumen de aire. El aceite de engranajes se debe aplicar con una Bomba de lubricación 7H-1680 o con una pistola de engrase adecuada. Use los aceites de engranajes recomendados indicados en este manual, en la tabla de "Viscosidades de lubricantes para temperaturas ambiente". 6. Asegúrese de que no se salgan los sellos (1). Empújelos hacia atrás si se salen. 7. Instale el tapón (2) . Nota: LA GRASA MPGM SE DEBE USAR SÓLO PARA UN SELLO AVERIADO. EL SELLO SE DEBE REEMPLAZAR TAN PRONTO COMO SEA POSIBLE. LA COMBINACIÓN DE ACEITE DE ENGRANAJES Y GRASA MPGM NO ES PERJUDICIAL PARA LA MÁQUINA. Cuando opere la máquina en condiciones árticas, lubrique la barra compensadora con el lubricante de engranajes EMGARD EP 75W90. El lubricante de engranajes EMGARD EP 75W90 es un lubricante sintético. Hudson Corporation dispone de este lubricante.
Consulte información adicional en el Manual de Operación y Mantenimiento, "Viscosidades de lubricantes".
Pasadores de extremo de la barra compensadora - Medir SMCS - 7206-082
Ver imagen
Ilustración 1
g00517058
Para ver si hay movimiento o desgaste anormal en el pasador de extremo de la barra compensadora, realice los siguientes pasos. Nota: Todo el peso de la máquina se debe quitar de la barra compensadora. La barra compensadora debe tener movimiento libre para medir el juego vertical del orificio para el pasador. 1. Limpie la zona alrededor del pasador de extremo con un sistema de lavado de alta presión. Inspeccione el estado del sello. 2. Vea si hay fugas de aceite y si el sello está en posición neutral. 3. Instale un indicador de esfera y mida el juego vertical en ambas juntas de pasador de extremo. 4. Compruebe el aceite en ambas juntas de pasador de extremo. Nota: Programe la reparación de la junta del pasador de extremo si el movimiento excede 1,50 mm (0,059 pulg). Consulte a su distribuidor Caterpillar para una inspección y para obtener instrucciones de reparación.
Nombre de archivo: Directorio: Plantilla:
Documento1
C:\Users\Juan\AppData\Roaming\Microsoft\Plantillas\Normal .dotm Título: Asunto: Autor: Juan Palabras clave: Comentarios: Fecha de creación: 05/10/2010 20:28:00 Cambio número: 1 Guardado el: Guardado por: Tiempo de edición: 104 minutos Impreso el: 05/10/2010 22:16:00 Última impresión completa Número de páginas: 198 Número de palabras: 34.143 (aprox.) Número de caracteres: 187.788 (aprox.)
