CHAPTER
2.
TWO T WO-S ST AGE VACUUM VA CUUM PUMP
WARNING Do not operate until pump is initially primed and connected to constant supply of clean compressant liquid. IF RUN DRY, PUMP WILL BE DAMAGED. Always use strainer to prevent sand and scale from entering the pump with liquid. Certain operating conditions in combination with water hardness may result in excessive lime deposits within the pump, causing it to bind. Should this condition be evident, flush pump with a solvent at regular intervals. This pump has been drained and flushed with a water-soluble water-soluble preservative oil prior to shipment. After pump has been in service, do not store without draining as specified within this this Bulletin. Pump can be damaged by freezing. USE CAUTION when removing inlet screens. Any foreign material on screen may fall into pump and cause extensive extensive damage at start-up. Base must be mounted to a leveled foundation and final coupling alignment done during installation. (Refer to Bulletin No. 642, Installation Instructions, Nash Vacuum Pumps and Compressors.)
NOTICE SERVICE AND PARTS SERVICE AND PARTS PARTS FOR NASH PUMPS ARE ASSURED THROUGH A WORLDWIDE WORLDWIDE NETWORK OF SALES AND SERVICE OFFICES LISTED LIS TED ON THE BACK COVER OF THIS BULLETIN. BULLE TIN. ANY REQUEST FOR INFORMA INFORM ATION, SERVICE AND PARTS PARTS SHOULD BE DIRECTED TO THE NEAREST NASH FIELD OFFICE. WHEN ORDERING ORDER ING REPLACEMENT REPLACEME NT AND SPARE SPARE PARTS, PARTS, TEST NUMBERS AND PUMP PUM P SIZES MUST BE PROVIDED. Test number and pump size are located on nameplate fastened to body of pump. If nameplate has been destroyed, test number will be found stamped on the body. body. Parts must be identified by index number and name. Refer to pump exploded view and legend, found within this Bulletin. If the location of the nearest office is unknown, information may be secured directly from Nash U.S., Trumbull, Connecticut 066111330, U.S.A. Telephon elephone e number is 203-459-3900, 203-459-390 0, Fax No. 203-459 203-459-3988. -3988.
WARRANTY Nash warrants that (i) the goods will be of the kind described on its acceptance of Buyer’s order as modified by any subsequent mutual agreement of the parties, (ii) it will convey to Buyer good title to such goods, (iii) such goods will be delivered free of any lawful security interest or lien or encumbrances unknown to Buyer, and (iv) such goods will be of merchantable quality and free from defects in material or workmanship under normal use and prescribed maintenance for a period of two (2) years from the date of shipment. The warranties specified shall also extend to goods manufactured manufactured by others and supplied by Nash, unless such goods have been separately stated and quoted by Nash, in which case only the warranties in clauses (i), (ii), and (iii) shall a pply pply.. NASH MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO THE MERCHANTABILITY OF GOODS MANUFACTURED BY ITS SUPPLIERS SUPPL IERS AND SEPARATEL SEPARATELY Y STA STATED AND QUOTED HEREIN. Nash’s warranty in clause (iv) above abo ve shall not apply to goods of standard construction when handling corrosive gases or using corrosive liquid compressants nor will clause (iv) apply to goods which have been damaged, altered or negligently maintained after delivery. delivery. Buyer’s exclusive exclusive remedy for Nash’s breach of the warranties set forth in clauses (i), (ii) and (iii) above shall be the replacement by Nash of non-conforming goods with conformconforming goods, without extra costs to Buyer, F.O.B. point of manufacture, with transportation prepaid to U.S. destination or domestic port, and Buyer’s exclusive remedy for Nash’s breach of the warranty contained in clause (iv) above shall be the repair by Nash without charge, cha rge, or the furnishing furnish ing by Nash, F.O.B. point of manufacture, manufacture , with transportation transport ation prepaid prepai d to U.S. U.S. destina destination tion or domestic dome stic port of a part or item of equipment to replace any part or item of equipment which is proved to have been defective; provided that (i) Buyer shall have notified Nash of any such breach not later than 10 days after the expiration of two (2) years from the date of shipment of the goods, and that (ii) Nash shall have the option of requiring the return of any defective material transportation prepaid to establish a claim. Nash shall in no event be liable for Buyer’s Buyer’s manufacturing manufacturing costs, lost profits, goodwill, expenses, or any other consequential or incidental damages resulting from a breach by Nash of any warranty. warranty. THERE ARE NO OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH EXTEND BEYOND THE WARRANTIES SET FORTH HEREIN.
© COPYRIGHT 1997 1997 The Nash Engineering Co. Lithographed in U.S.A.
The Name "Nash" used in this bulletin is a Registered Trademark of t he Nash Engineering Company
ii
TABLE OF CONTENTS
Section 1. Description
1-1
Aboutt this Bull Abou Bulletin etin ....... ................ ................. ................ ................ ................ ................. ................. ................ ................ ................ ................ ................... ................... ................ ........... ... 1
1-2
How the Nash Vacuum Pump Works ........ ................ ................. ................. ................ ................ ................ ................ ................. ................. ................ ................. ......... 1
Section 2. Operation
2-1
Preparatio Prepa ration n for Intia Intiall Start Start-Up -Up ........ ................. ................. ................ ................ ................ ................ ................. ................. ................ ................ ................. .................. ........... 3
2-2 22
Liquid Liq uid Comp Compres ressan santt (Seal (Seal Wate Water) r) ... ....... ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ......... .........3 ....3
2-3 23
Draini Dra ining ng and Flu Flushi shing ng ... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ......... ......... ........ ....... ... 3
2-4 24
Prelim Pre limina inary ry Ins Inspec pectio tion n .... ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ....... .......3 ....3
2-5
Start-Up Start -Up and Opera Operating ting Check Checkss ........ ................ ................ ................. ................. ................ ................ ................ ................ ................. ................. .................... ............... ... 4
Section 3. Troubleshooting
3-1
Locating Locat ing Tr Troubl oubles............... es....................... ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. ...................... ..................... ........... ... 5
Section 4. Preventive Maintenance
4-1
Periodic Perio dic Main Maintenan tenance ce ........ ................ ................. ................. ................ ................ ................ ................ ................. ................. ................ ................ .................. .................. ............... ....... 5
4-2 42
Six Mon Month th Int Interv ervals als .... ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ........ ....... ....... ....... ... 5
4-3 43
Twel welve ve Mo Month nth Int Interv ervals...... als......... ....... ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ......... ........ ....... ....... ... 5
4-4 44
Bearin Bea ring g Lub Lubric ricati ation..... on......... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ......... ......... ....... ....... ....... ... 5
4-5
Stuffing Stuf fing Box Packin Packing g ........ ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. .................... .................... .............. ..... 6
4-6
Shutdown Shut down Perio Periods.............. ds....................... ................. ................ ................ ................ ................. ................. ................ ................ ................ ................ ................... .................... .............. ..... 7
Section 5 Disassembly, Inspection and Reassembly
5-1
Dismantli Dism antling ng Pump ........ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. ................. ................ ................... .................... ........... 9
5-2 52
Disass Dis assemb emblin ling g Fixed Fixed Beari Bearing ng End End ... ....... ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ........ ...... .. 10
5-3 53
Disass Dis assemb emblin ling g Floatin Floating g Bearing Bearing End End .... ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ .... 12
5-4 54
Removi Rem oving ng Roto Rotorr and and Shaft Shaft Asse Assemb mbly ly .... ........ ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... .... 12
5-5 55
Removi Rem oving ng Bod Body/F y/Floa loatin ting g Bear Bearing ing End Hea Head d and Con Conee Ass Assemb embly ly .... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ...... .. 12
5-6 56
Removi Rem oving ng Rotor Rotor from from Shaft.......... Shaft.............. ........ ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ........ ........ ... 13
5-7 57
Removi Rem oving ng Con Conee from from Hea Head d .... ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ....... ... 13
5-8
Inspectio Insp ection n of Disas Disassembl sembled ed Parts............. Parts..................... ................ ................ ................ ................ ................. ................. ................ ................ .................... ................. ..... 13
5-9 59
Cones Con es ... ....... ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ......... ......... ........ ........ ........ ....... ..... 13
5-10
Rotor ........ ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. ................. ................ .............. .............. ................ .............. ...... 14
iii
TABLE OF CONTENTS (Continued)
5-11 511
Shaft Sha ft .... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ......... ......... ........ ........ ........ ...... .. 14
5-12 Reass Reassembli embling ng Pump ........ ................. ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. .................14 ........14 5-13 5-1 3
Reasse Rea ssemb mblin ling g Rot Rotor or and Sha Shaft ft ... ....... ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ...... ....... ...... .. 14
5-14 5-1 4
Instal Ins tallin ling g Con Conee in Hea Head d .... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ .......15 ...15
5-15 5-1 5
Instal Ins tallin ling g Body Body onto onto Floati Floating ng Beari Bearing ng End End Head Head and Cone Cone Asse Assemb mbly..... ly......... ........ ........ ........ ....... ....... ........ ........ ........16 ....16
5-16 5-1 6
Instal Ins tallin ling g Rot Rotor or and Sha Shaft ft Ass Assemb embly ly ... ....... ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ...... .. 16
5-17 5-1 7
Instal Ins tallin ling g Fixed Fixed Beari Bearing ng End End Head Head and Cone Cone Asse Assembl mbly y on Body Body .... ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ..... 16
5-18 5-1 8
Assemb Ass emblin ling g Flo Floati ating ng and fix fixed ed Bearing Bearing End Endss .... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ...... 16
5-19 5-1 9
Instal Ins tallin ling g Fix Fixed ed Bea Bearin ring g ... ....... ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ...... ....... ........ ....... ..... 16
5-20 5-2 0
Instal Ins tallin ling g Flo Floati ating ng Bea Bearin ring g (11 (119) 9) .... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ........ ....... ...... ....... ...... .. 18
5-21 5-2 1
Settin Set ting g End Travel Travel and Fin Final al Ass Assemb embly ly .... ........ ........ ........ ........ ........ ........ ........ ....... ....... ........ ........ ........ ....... ....... ........ ........ ....... ....... ........ ........ ....... .......19 ....19
5-22
Bearing Beari ng Lubri Lubricatio cation n ........ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. ................. .................. .................. ...........20 ...20
LIST OF ILLUSTRATIONS Figure No.
1-1
Functiona Funct ionall Element Elementss of TC Two-St Two-Stage age Vacuum Vacuum Pump Pump....... ................ ................. ................ ................ ................ ................ ................. ................ ....... 1
1-2
First-stag First -stagee Liqui Liquid d Compr Compressan essantt and and Air Flow ........ ................ ................. ................. ................ ................ ................ ................ ................. ................... ............ 2
2-1
Typica ypicall Pipi Piping ng Conne Connection ctionss ........ ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ .................... .................... ............3 ....3
4-1
Removing Remov ing Stuf Stuffing fing Box Packi Packing ng ......... ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ .................. ...............7 .....7
4-2
Stuffing Stuf fing Box Lant Lantern ern Glan Gland d Pull Puller er ......... ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ............ .... 7
4-3
Packing Packi ng Stuf Stuffing fing Boxes ......... ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................... ................... ........... ... 8
5-1
Removing Remov ing Fixed Beari Bearing ng Bracke Brackett ........ ................ ................. ................. ................ ................ ................ ................ ................. ................. ................ ............... ............ ..... 10
5-2
Bearing Bearin g Pulling Pulling Tools.............. ools....................... ................. ................ ................ ................ ................ ................. ................. ................ ................ ..................... ..................... ............11 ....11
5-3
Pulling Pulli ng Bearin Bearing g ....... ................ ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ............... ............... ................ .......... .. 11
5-4
Removing Remov ing Idle End Head and Cone assem assembly bly ........ ................ ................ ................. ................. ................ ................ ................ ................ ................. ........... 12
5-5
Loosening Loos ening Cone Screw Screwss ........ ................ ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ..................... ....................13 .......13
5-6
Checking Check ing Cone for Wear ......... ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ .................. .................. ........ 13
5-7
Pressing Press ing Rotor onto Shaft ........ ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. ................ ............... .......... 14
5-8
Installin Insta lling g Roto Rotorr and Shaft Asse Assembly mbly ........ ................ ................ ................. ................. ................ ................ ................ ................ ................. ..................... ...............15 ...15
5-9
Tapered Rolle Rollerr Bearing Bearing Asse Assembly mbly Expl Exploded oded View ....... ................ ................. ................ ................ ................ ................ ................. ................. ........... ... 16
5-10 Insta Installin lling g Fixed Beari Bearing ng ........ ................ ................. ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ...........17 ...17 5-11 Measu Measuring ring Bearing Bearing Roller-Cap Roller-Cap Clearance Clearance ........ ................ ................. ................. ................ ................ ................ ................ ................. ................. ...............18 .......18
iv
LIST OF ILLUSTRATIONS (continued)
5-12 Meas Measuring uring End Travel Travel at Float Floating ing Bearing End ........ ................ ................. ................. ................ ................ ................ ................ ................. ................ ....... 18 5-13 End Travel Travel Check Setup at Fixed Bearing Bearing End........ End ................ ................ ................ ................. ................. ................ ................ ................ ............... ......... .. 19 5-14 Meas Measuring uring Shim Gap ......... ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ .................. .................. ............. ..... 20 5-15 Typica ypicall Nash TC Two-St wo-Stage age Vacuum Vacuum Pump, Exploded Exploded View........ View ................ ................ ................ ................. ................. ................ ........... ... 22
LIST OF TABLES Table No.
4-1
General Gener al Greas Greasee Speci Specificat fications............... ions....................... ................. ................. ................ ................ ................ ................ ................. ................. ................. ................. ............ .... 7
5-1
Pump Data ....... ................ ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ ................. .................. ................. ................ .......... 9
5-2
Approxim Appr oximate ate Weight eightss of Parts ........ ................. ................. ................ ................ ................ ................ ................. ................. ................ ................ ................ ................ .......... 10
v
SECTION 1 DESCRIPTION 1-1 11
by the casing of a body; the other portion of the rotor lies within a second stage chamber that is also formed by the body casing. Liquid compressant (usually water), which is called the seal liquid, is applied to the first stage chamber in the body from a liquid passage in the cone. The mixture of liquid compressant and compressed gas is discharged through the first stage discharge passage and an internal manifold to the second stage. All of the liquid compressant and gas from the first stage discharge passes through the second stage to the pump discharge. Both pump stages function identically identically.. Figure 1-2 shows the sequence of actions through through the first stage. The actions illustrated are made possible by the fact that the axis of the body casing is offset from the axis of the rotor. The offset of the body is designed so that the forces on the rotor balance out, and smooth, quiet operation results. The offset in the second stage is diametrically opposite the offset in the first stage.
ABOU AB OUT T THI THIS S BUL BULLE LETI TIN N
This bulletin contains information for owners and operators of the Nash Two-Stage Two-Stage Vacuum Pump, TC. This information includes a description of how to operate and maintain these vacuum pumps. Note For installation information refer to Bulletin No. 642, Installation Instructions, Nash Vacuum Pumps and Compressors.
1-2 12
HOW THE HOW THE NA NASH SH VA VACU CUUM UM PU PUMP MP WORKS
The main functional assemblies of the Nash TC tw o-stage vacuum pump are shown in in Figure 1-1. A two-stage rotor in the vacuum pump is turned by an external motor. motor. One portion of the rotor lies within a first-stage chamber that is formed
AIR INLET
FIRST STAGE ROTOR
FLOATING BEARING END CONE SECOND STAGE ROTOR
FLOATING FLOATING BEARING END HEAD
DRIVE SHAFT
AIR DISCHARGE
FLOATING FLOATING BEARI NG BRACKET
FIXED BEARING BRACKET
BODY FIXED BEARING END CONE
FIXED BEARING END HEAD
Figure 1-1. Functio Functional nal Elements of TC Two-Stage Vacuum Pump 1
Figure 1-2. First-Stage Liquid Liquid Compressant Compressant and Air Flow
2
SECTION 2 OPERATION 2-1
PREPARA PREP ARATION TION FOR INIT INITIAL IAL ST START ART-UP -UP
until there is a clear flow from all all drains. Although the vacuum pump is flushed with inhibiting oil prior to shipment, a light film of rust may form before installation is complete. This film will disappear after the vacuum pump shaft has been manually rotated a few times. Close the shut-off valve for the seal water supply. supply. Replace the seal water drain plugs using a pipe thread compound.
Note Contact your Nash Representative for start-up assistance.
2-2 Liquid Compressant Compressant (Seal Water) Water)
2-4 Preliminary Inspection
Piping connections must be made to a liquid compressant supply. (See Figure 2-1.) The usual liquid compressant is fresh water at 60ºF (15ºC). Variations in the flow rate of ±50 percent will not damage the pump, but wide variations in flow may alter pump capacity.
Perform the following preliminary inspections before starting the pump: WARNING PERFORM ALL OF THE FOLLOWING STEPS IN ORDER TO ENSURE PERSONNEL SAFETY AND EQUIPMENT PROTECTION.
CAUTION THE LIQUID COMPRESSANT FLOW MUST BE STARTED STARTED BEFORE BEFOR E STARTING THE PUMP DRIVE MOTOR, EVEN IF THE PU MP IS ONLY ONLY BEING OPERATED TO CHECK THE DIRECTION OF ROTATION.
a. b.
2-3 Draining and Flushing
c.
Before starting the vacuum pump upon completion of alignment (as specified in Bulletin No. 642, Installation Instructions, Nash Vacuum Pumps and Compressors), remove the seal water drain plugs (22 and 22-1, Figure 5-15) from the heads and body of the vacuum pump. Turn on the shutoff shutoff valve for the seal water supply. supply. Allow the seal water to flow
d.
e.
Isolate all Isolate all power power sourc sources es to to the drive driverr unit unit in in order order to to make certain that no accidental starting occurs. Inspect Insp ect the the pump pump to make make certai certain n that that all drai drain n plugs plugs have been properly installed. Manually Manua lly prim primee the the pump pump with with liqu liquid id compre compressant ssant until there is a flow from the overflow. Inspect Inspe ct the sepa separato rator, r, the the receive receiver, r, and and the heat excha exchanges nges (if used) to make certain that all shipping plug protectors have been removed and that all open connections have been plugged or piped. Inspect Inspe ct all all piping piping to make make certa certain in that that prope properr connections connections
Figure 2-1. Typica Typicall Piping Connections Connections 3
f. g.
h.
I.
j. k.
have been made to the pump and its basic system in accordance with the Nash installation drawing(s) that have been supplied with with the pump. Make certain that that all piping is the correct size, securely connected, and properly supported. Check Che ck vacuu vacuum m pump pump and driv drivee hold-d hold-down own bolt boltss and base or soleplate foundation bolts for tightness. I n s pe pe c t al al l o th th e r ma ma j o r o p e ra ra t i on on a l co co m p on on e n t connections, associated with the pump, to make certain that they are in accordance with the recommendations of their respective equipment manufacturers. Inspect Insp ect all all pump pump contr control ol compon components ents (con (control trol valv valves, es, gauges, etc.) to make certain that they have been located in accordance with the Nash installation drawing(s). Make certain that these components components are correctly oriented in the piping scheme in order to achieve the proper direction of flow and functional operation. Inspect Inspe ct the the pump pump inle inlett to make cert certain ain that the inle inlett screen and clean-out connections have been properly made and are free of tools, equipment and debris. Make cert certain ain that the liqu id disc discharge harge conn ecti ection on is free of obstructions. Removee the coup Remov coupling ling or V-belt V-belt guar guard d and rota rotate te the the pump shaft by hand in the specified direction of rotation by an arrow cast on the pump body and is illustrated on the installation drawing. THE PUMP SHAFT MUS T ROTATE ROTATE FREELY. FREELY. If the pump shaft is bound and cannot be freed by rotating it manually, contact your Nash Representative for assistance.
2-5 STARTUP AND OPERATING CHECKS When the preliminary inspection and preoperational check procedures have been completed, start the pump and check pump operation as follows: WARNING IF THE PUMP IS TO BE CHECKED IN A SYSTEM, NOTIFY THE APPROPRIATE PLANT PERSONNEL BEFORE PLACING A PUMP ON LINE, PARTICULARL PARTICULARLY Y WHEN PLACING THE PUMP ON LINE FOR THE FIRST TIME. STARTING UP A SYSTEM UNEXPECTEDLY MAY CAUSE PERSONNEL INJURY INJURY.. Note Refer to Troubleshooting, Section 3, if any operating difficulties arise when performing the following steps. a.
b.
Note If pump operation becomes unstable, pump vibration levels will increase and the pumping volume will de- crease. IF THE PUMP DOES NOT STABILIZE, STABILIZE, SHUT DOWN DO WN THE SYSTEM IMMEDIATELY, AND DETERMINE THE CAUSE.
CAUTION DO NOT ATTEMPT TO FREE A PUMP SHAFT FROM A BINDING OR BOUND CONDITION BY AP PL PLYING YING POWER TO THE DRIVE MOTOR. MOTOR. SEVERE DAMAGE MA MAY Y RESULT.
c.
CAUTION NEVER OPERATE THE PUMP WITHOUT ADEQUATE PRIME AND LIQUID SEAL FLOW. HIGH LIQUID SEAL SUPPL SUPPLY Y PRESSURES DO NOT NECESSARILY INDICATE THAT THE FLOW IS ADEQUATE. QUA TE. CHECK FOR FLOW FROM VACUUM PUMP DISCHARGE (OR WATER TRAP SILENCER). l.
Check the Check the pump pump and the the syste system m for adeq adequat uatee prime prime and and then turn on all main water supply sources to the pump or heat exchanger. With Wi th the wate waterr supply supply sources sources turne turned d on and and all perso personnel nnel and equipment clear of the pump system, apply power to the drive motor.
d.
e.
While the pump is being being stabi stabilized lized at the the requir required ed inlet inlet vacuum, check the flow of liquid seal (water) (w ater) to the pump. Make certain that the liquid seal is flowing out of the water trap silencer drain. Maintai Mai ntain n a constan constantt check check on the the temper temperatur aturee of the the pump pump casing during the the startup procedure. procedure. If the temperature temperature rises rapidly or is 40ºF (5ºC). or more above the liquid compressant temperature, shut down the unit immediately and determine the cause. After start starting ing the the pump, pump, monit monitor or the the tempera temperature ture of the the bearing bracket until the bearing bracket temperatures stabilize for a minimum of 30 minutes. CAUTION IF A BEARING BRACKET TEMPERATURE IS MORE THAN 50ºF (10ºC). ABOVE THE PUMP CASING TEMPERATURE, SHUT DOWN THE PUMP IMMEDIATELY IMMEDIATELY AND DETERMINE DET ERMINE THE CAUSE.
With main With main suppl supply y valves valves open open and and the the pump pump primed, as in step c, bump the drive motor for the pump in order to check for the proper direction of shaft rotation.
WARNING MAKE CERTAIN THAT THE COUPLING OR V-BELT DRIVE IS ENCLOSED WITH A GUARD BEFORE STARTING THE DRIVE MOTOR.
CAUTION IF ABNORMAL BEARING BEARING NOISE, NOISE, VIBRATION, ODOR OR SMOKING OCCUR, SHUT DOWN THE PUMP IMMEDIATELY TO DETERMINE THE CAUSE. 4
f.
g.
Check the pum Check pump p for vib vibrat ration ion and noi noise. se. Exc Excessi essive ve vibration and noise is an abnormal condition on a Nash pump. Shut down the pump pump immediately and determine the cause. Check the speed speed (RPM) of pump pump shaft shaft rotat rotation ion by by prying prying the nameplate cap from the fixed bearing outer cap and inserting a tachometer with a shaft extension, if necessary. Compare the measured speed with the rated speed for the pump. The rated operating operating speed and capacity capacity can be determined from the purchase specifications or by consulting with your Nash Representative.
h.
After the pump pump has been been runnin running g for for ten ten minutes minutes with steady leakage from the stuffing box, tighten the gland nuts evenly one-quarter turn. Repeat at ten minute intervals until there is a leakage of approximately 45 to 60 drops per minute from the gland with no overheating. This dripping is necessary to provide lubrication for the packing and thereby prevent it from scoring and burning the shaft. Subsequent tightening tightening of the gland gland nuts onequarter turn should be done with the pump operating at normal working temperature and vacuum.
SECTION 3 TROUBLESHOOTING 3-1 LOCA LOCATING TING TROUBLES d. e.
Nash TC two-stage vacuum pumps require little attention other than checking the ability of the vacuum pump to obtain full volume or maintain constant vacuum. If a V-belt drive is used, V-belt tension should be checked periodically and the V-belt should be inspected for excessive wear. V-belts are normally rated for service lives of 24,000 hours. If operating difficulties arise, make the following checks: a. Chec Check k for for proper proper seal wate waterr flow flow rate rate as as specifi specified ed in in paragraph 2-2. b. Chec Check k for the the correc correctt direct direction ion of of vacuum vacuum pump pump shaf shaftt rotation as cast on the body of the vacuum pump. c. Check that the vacuu vacuum m pump pump operate operatess at the corr correct ect rpm—not necessarily the test rpm stamped on the
vacuum pump nameplates. nameplates. (Refer to Paragraph Paragraph 2-5, step g.) Check Che ck for for a restr restrict iction ion in in the gas inle inlett line. line. If the the pump pump is shut shut down down becau because se of a cha change nge in in temtemperature, noise and/or vibration from normal operating conditions, check bearing lubricati lubrication, on, bearings condition, and coupling or V-belt drive alignment. alignment. Refer to Bulletin No. 642, Installation Instructions, Nash Vacuum Pumps and Compressors, for alignment procedures and V-belt tensioning. Note If the trouble is not located through these checks, call your Nash Representative before dismantling or disassembling disassembling the vacuum pump. pump. He will assist in locating and correcting the trouble.
SECTION 4 PREVENTIVE MAINTENANCE
4-1 PERIODIC MAINTENANCE
obstruction if possible and reinstall or replace orifice plug. 4. Reins Reinstall tall pipe plug in fixed fixed beari bearing ng end end head. head.
Note The following schedules should be modified as necessary for your specific operating conditions.
4-3 Twelve-Month Intervals a.
4-2 Six-Month Intervals a.
b. c. d.
b.
If the the drive drive coupling coupling is lubric lubricated, ated, it should should be filled filled with oil or grease in accordance with the coupling manufacturer’s instructions. Check the pump pump beari bearings ngs and and lubric lubricate, ate, if necessa necessary ry,, as specified in paragraph 4-4. Relubr Rel ubrica icate te the driv drivee motor motor beari bearings ngs accor accordin ding g to the the motor manufacturer’s instructions. Check Chec k to ensure ensure that that the the lobe unloa unloader der orifi orifice ce in the the orifice orifice plug in body is not plugged as follows: 1. Remove pipe plug (22-1, Figure 5-15) from fixed bearing end head (103) and inspect orifice plug (21). 2. If orifice orifice is plugged, plugged, use rod rod to clean clean out any any obstructions. 3. If orifice orifice plug plug cannot cannot be clea cleaned ned with with rod, use use Allen Allen wrench and remove orifice plug. Remove
Inspectt the pump beari Inspec bearings ngs and and lubrica lubricate, te, if neces necessary sary,, as specified in Paragraph 4-4. Replace Repl ace the the stuffin stuffing g box packin packing g as specifi specified ed in Paragr Paragraph aph 4-5.
4-4 Bearing Lubrication The pumps covered in this Bulletin have grease lubricated bearings installed in bearing brackets with grease fittings. Bearings are lubricated before shipment and require no lubrication for approximately six months. Note Lubricate the bearings every year, unless the pump is being operated in a corrosive atmosphere or with a liquid compressant other than water, in which case the interval should be shortened. shortened. Lubrication should be done while pump is running. 5
To add grease and check condition and quantity of grease in the bearing bracket proceed as follows: a. b.
c. d.
e.
f. g.
frequent replacement may be required on severe process applications in which liquid compressant in the pump is contaminated by foreign material or is incompatible with the existing existing packing material. (The packing material consists of four rings with the dimensions listed in Table 5-1.) In some cases, a different different packing material material may be required because of the liquid compressant used. When replacing the packing in a stuffing box, remove the old packing as follows: a. Slide sling slinger er (3, Figure Figure 5-15) again against st beari bearing ng inner inner cap (116 or 118). b. Loose Loosen n and and remove remove gland nuts (102(102-1 1 or 103-1 103-1,, Figure Figure 4-3) from studs. c. Slide packi packing ng gland gland assem assembly bly (112) (112) as far far from from stuf stuffing fing box as it will go, remove two nuts, lockwashers and screws holding halves of packing gland assembly together and remove two halves. d. Screw tips of packin packing g pullers pullers (2, Figure Figure 4-1) into packi packing ng (1). e. Pu Pull ll pac packi king ng out out of of stuf stuffi fing ng box box.. f. For Form m two lante lantern rn gland gland pulle pullers rs from from 1/8-i 1/8-inch nch diame diameter ter steel wire as shown in Figure 4-2. g. Work bent bent tip tip of each lante lantern rn gland gland puller puller aroun around d outer outer diameter of lantern gland (10, Figure 4-3) in stuffing box until pullers are felt catching in slots in lantern gland on opposite sides. h. Pul Pulll lante lantern rn glan gland d out out of stu stuffi ffing ng box. box. I. Scre Screw w tips tips of pack packing ing pull pullers ers (2, Figu Figure re 4-1) 4-1) into remaining packing in stuffing box and pull packing out. j. Thoroughly clean stuffing box and check shaft for severe scoring and wear as specified in Paragraph 5-11 before installing new packing.
While the While the pump pump is runni running ng remove remove pipe plug from beari bearing ng brackets (108 & 109). Install grease fitting fitting in each bracket. Add grease grease in accord accordance ance with Table 4-1, to to each each bearing bearing using a hand grease grease gun. Five pumps of the grease gun is sufficient. Remove Rem ove grea grease se fitt fitting ing,, re-ins re-instal talll pipe pipe plugs. plugs. To check check condi condition tion of greas grease, e, shut shut pump down. Pull back bearing caps and check for contamination or presence of water. Remove excess grease from each cap. 1/3 of each cap volume full of grease is sufficient. If grease grease is contam contaminat inated, ed, remov removee fixed fixed or float floating ing beari bearing ng bracket (109 or 108), fixed or floating bearing (120 or 119) and associated parts as specified in Paragraph 5-2, steps a through r for fixed bearing (120), or Paragraph 5-3, steps a through i for floating floating bearing (119). (119). Discard bearing. Flush Flu sh bearin bearing g bracke brackett and beari bearing ng cap cap to remove remove all all greas grease. e. Install Inst all beari bearing ng bracket bracket,, bearing bearing and and associa associated ted parts parts as as specified in paragraph 5-18 and as follows: Note Lubricate both bearings in accordance with section 5.22 using grease in accordance with Table 4-1. 1. For floati floating ng bearing bearing (119 (119), ), perform perform steps steps a throug through h c, Paragraph 5-20. Note Make certain that lip seal (5-1) is seated in floating bearing outer cap (115) with sealing lip first, away from bearing. 2. Secure float floating ing beari bearing ng outer outer cap (115) and new new gasket (115-3) to floating bearing bracket (108) as specified in paragraph 5-21, steps u, v and w. 3. Rotat Rotatee shaft shaft (111) (111) by hand hand and make make sure sure there there is no no rubbing or metal-to-metal contact. 4. For fixed fixed beari bearing ng (120), (120), procee proceed d as specif specified ied in in Paragraph 5-19, steps a through n.
a.
b. c.
CAUTION THICKNESS OF SHIMS (4) EQUAL TO THICKNESS OF SHIMS REMOVED FROM PUMP MUST BE REINSTALLED TO MAINTAIN REQUIRED END TRAVEL.
d. e.
5. Install Install shims shims (4) and and fixed fixed bearin bearing g outer outer cap (1 (117) 17) on fixed bearing bracket (109) as specified in Paragraph 5-21, steps p and q. 6. Rota Rotate te shaft shaft by by hand and make make sure sure there there is no rubbing or metal-to-metal contact.
4-5 STUFFING BOX PACKING
f. g. h.
A preventative maintenance schedule should be established for the tightening and replacement of the packing in the stuffing stuffing boxes of the pump. pump. The packing in the stuffing boxes in pumps used in continuous process systems should be replaced at annual shutdown. More
I. 6
Install the new packing in the stuffing boxes as follows: Fabricate Fabric ate two two hard hard rubbe rubberr strips strips to to fit betw between een OD OD of shaft (111) and ID of stuffing box, as shown in Figure 43, Part C, to use as packing ring pushers. Lubricat Lubr icatee inside inside diame diameter ter of of packing packing rings rings with Molyk Molykote ote G-n paste or equivalent. Open pack packing ing ring ring into into spira spirall by pulli pulling ng ends ends axial axially ly apart as shown in Figure 4-3, Part A. Work each each packing packing ring onto onto shaft shaft and and into into stuf stuffing box box area as shown in Figure 4-3, Part B. Using pushe pushers rs fabric fabricated ated ink step a, push push first first packi packing ng ring into stuffing stuffing box as firmly as possible. possible. Make certain that packing ring is seated against end of stuffing box as shown in Figure 4-3, Part Part C. As each additional packing ring is installed, stagger location of butted ends of ring so that successive ring is offset offset by 90 degrees. (See Figure 4-3, Part D.) Make certain that each packing ring is firmly seated. Instal Ins talll lant lantern ern gla gland nd (10) (10).. (Se (Seee Figur Figuree 4-3, 4-3, Part Part E.) Install Inst all remain remaining ing two two packing packing rings as specif specified ied in in step step e. Instal Ins talll two halve halvess of packin packing g gland gland assembl assembly y on shaft shaft and assemble with two screws, lockwashers, and nuts. Slide packing gland assembly on gland studs so that it is flush against last packing ring installed. Install and tighten gland nuts (102-1 or 103-1), evenly, finger tight. (See Figure 4-3, Part F.) Turn on pum pump p (Par (Paragr agraph aph 2-5 2-5). ). Che Check ck tem temper peratu ature re of
Table 4-1. General Grease Specifications Specifications General Requirements A. Premium quality industrial bearing grease. B. Consistency grade: NLG1 #2 C. Oil viscosity (minimum): o o @ 100 (38 C) - 500 SSU (108 cSt) o o @ 210 (99 C) - 58 SSU (10 cSt) D. Thickener (Base): Lithium, Lithium Complex or Polyurea for optimum WATER RESISTANCE.
1. Pack Packin ing gR Rin ing g 2. Pa Pack ckin ing g Pul Pulle lers rs
E. Performance characteristics at operating temperature: o o o 1. Operating temperature range; at least 0 to 250 F (18 o to 121 C) 2. "Lon "Long-Lif g-Life" e" perform performance ance 3. Good mechan mechanical ical and chemical chemical stability. stability.
10.. La 10 Lant nter ern n Gl Glan and d
Figure 4-1. Removing Stuffing Stuffing Box Packing
F. Additives - Mandatory: 1. Oxida Oxidation tion inhib inhibitors itors 2. Ru Rust st inhib inhibito itors rs
Figure 4-2. Stuffing Box Lantern Lantern Gland Puller Puller
G. Additives - Optional: 1. Ant Anti-w i-wear ear agen agents ts 2. Corr Corrosion osion inhib inhibitors itors 3. Meta Metall dea deactivat ctivators ors H. Additives - Objectionable: 1. Extre Extreme me pressure pressure (EP)* (EP)* agents agents 2. Molyb Molybdenu denum m disulfide disulfide (MoS (MoS 2) 3. Tackin ackiness ess agen agents ts
j.
* Some greases exhibit exhibit EP characteristics without without the use of EP additives. These EP characteristics are not objectionable.
NASH STANDARD GREASE RECOMENDATIONS (By Manufacture Manufacturer) r) The following is a list of some greases that exhibit the desired characteristics required by Nash: Grease M an anufacturer
Product
Amoco Atlantic Chevron Exxon Gulf Oil Mobil Shell Oil Texaco
Rykon Premium 2 Arco Multipurpose Chevron SRI-2 Unirex N2 Gulfcrown No.2 Mobilux 2 Alvania 2 or Dolium R Premium RB #2
pump stuffing box area as pump pump operates. Make certain there is leakage from stuffing stuffing box at all times. If there is no leakage or if stuffing box overheats, shut down pump and determine cause. After pump has been running for ten minutes minutes with steady leakage from stuffing box, tighten gland nuts evenly onequarter turn. Repeat at ten-minute ten-minute intervals until there is leakage of approximately 45 to 60 drops per minute from the gland with no overheating. This dripping is necessary to provide added lubrication for packing and thereby prevent it from scoring and burning shaft. Subsequent tightening of gland nuts one-quarter turn should be done with pump operating at normal working temperatures and vacuum.
4-6 SHUTDOWN PERIODS If the pump is shut down for 2 to 3 weeks, rotate the vacuum pump and recirculating pump (if used) by hand at least once every week to prevent rust buildup between cast iron parts which may result in seizing. If the pump must be taken out of service for more than 3 weeks up to one year, proceed as follows to prevent seizing during the storage due to rust formation:
NOTE: This list is not an endorsement endorsement of these products and and is to be used used only for for reference. reference. A customer can have his local local lubricant supplier cross reference reference these greases greases for an equivalent or current grease so long as it meets the General Requirements.
These preservation procedures apply to all-cast-ir all-cast-iron on pumps only, maintained in covered storage. a.
Grease Compatibility Compatibility Note: The above listed greases greases are compatible with Nash Standard grease, Chevron SRI-2. To maximize a grease lubricant's performance, however, however, it is recommended that intermixing of different greases be kept at a minimum.
b.
c.
d. 7
Remove pipe Remove pipe plug plugss (22 (22 and and 22-1 22-1,, Figure Figure 5-1 5-15) 5) from from pum pump p body (101), and heads (102 and 103) and drain all liquid from pump. Replace pipe plugs. Removee all Remov all packing packing as specif specified ied in paragr paragraph aph 4-5 and flush out stuffing boxes with rust inhibitor. Reinstall packing. Touc ouch h up any area areass where where paint paint has has chipp chipped ed and and apply apply Houghton’s Rust Veto #344 coating compound, or equivalent, to external surfaces as necessary. Disconnec Disco nnectt dischar discharge ge piping piping and blank blank off pump discharge flange.
e. f.
g.
Fill pump with water water-sol -soluble uble prese preserving rving oil, J.L. Quimb Quimby y NRP100 or equivalent, through inlet flange. Rotate Rot ate pum pump p shaft shaft by hand hand 10 to to 15 rev revolu olutio tions. ns.
1. Remove Remove pipe pipe plugs plugs (22-1 (22-1 and 22-2) 22-2) from from pump pump body body and heads and drain all preserving oil. 2. Remov Removee blanks blanks from from pump pump discha discharg rgee flanges flanges and and reconnect discharge piping. 3. Repack stuf stuffing fing boxes with new packing packing as specifi specified ed in paragraph 4-5. 4. Flu Flush sh pump pump as specif specified ied in in paragra paragraph ph 2-3. 2-3. 5. Repla Replace ce drain drain and and vent vent pipe pipe plugs plugs in in body body using using Key-Tite pipe compound. Start pump as as specified in Paragraphs 2-4 and 2-5.
Note For long term preservation procedures for storage periods of more than 1 year, contact your Nash Representative. When Whe n pump pump is to to be put put back back in serv service ice,, procee proceed d as follows:
Note: Rotated 90 degrees to show gland studs and nuts.
1. Pack Packin ing g Ring Ring 10210 2-1. 1. Gl Glan and d Nu Nutt 2. Lan Lanter tern n Gland Gland Sup Supply ply Connection
103. 103. 3. 10310 3-1. 1. 10.. 10
Fixed Beari Fixed Bearing ng End End Head Head Packi Pac king ng Ri Ring ng Pus Pushe herr Glan Gl and d Nut Nut Lant La nter ern n Gla Gland nd
Figure 4-3. Packing Stuffing Boxes
8
111. Shaft 102. 10 2. Flo Floati ating ng Beari Bearing ng End End Head Head 112. 11 2. Pac Packin king g Gla Gland nd Assem Assembly bly
SECTION 5 DISASSEMBLY, INSPECTION AND REASSEMBLY 5-1 DISMANTLING PUMP
if gland studs require replacement). m. The Therma rmally lly ins insula ulated ted glo gloves ves.. n. Ho Hoiist an and d sl slin ings gs.. o. Hyd Hydrau raulic lic jac jack, k, 20 ton cap capaci acity ty.. p. Induc Induction tion heat heater. er. Used to heat heat bearin bearings gs (1 (119 19 and and 120) 120) for installation.
Before disassembling the pump, isolate the electrical input and disconnect the seal liquid connections, coupling to drive motor or V-belt drive, and inlet and outlet connections. Disassemble and reassemble reassemble the pump on a level surface. Mark all parts as they become accessible during disassembly to ensure correct positioning for reassembly. Before Befo re starting disassembl disassembly y, collect the parts, materials and standard tools, and fabricate the special tools listed in the following paragraphs, which are required for disassembly and reassembly of the pump.
Table 5-1 Pump Data Note: All dimensions are in inches
Parts and Materials a. Min Minimu imum m recomm recommende ended d spares spares spec specifi ified ed in Lege Legend nd for for Figu Fi gure re 55-15 15 (w (whi hich ch sh shou ould ld be ke kept pt on hand at all times). Note It is not advisable to disassemble a pump unless the following replacement items are available for reassembly: two sets of stuffing box packing (1); one set of adjusting shims (4); one set of gaskets; and floating and fixed bearings (119 & 120). (Refer to Table 5-1.) b. Mol Molyko ykote te G-n Pas Paste te or equ equiva ivalen lent. t. c. Locqu Locquic ic Primer Primer T and and Loctite Loctite 242 (requ (required ired only if gland gland studs (102-2 or 103-2) require replacement). d. Yel elllow gr greeas ase. e. e. Gre Grease ase as spe specif cified ied in Ta Table ble 4-1 4-1.. f. So Solv lven entt suc such h as as ker keros osen ene. e. g. Two 3/4-1 3/4-11 1 eye bolt boltss (M20X (M20X2.5mm 2.5mm for metr metric ic pumps pumps)) with nuts to remove and install heads (102 and 103). h. Tw Two o 2 inch inch bushings bushings with clear clearance ance holes holes for attach attaching ing 3/ 3/ 4-11 eye bolts and nuts I. Two ½-13 ½-13 jacksc jackscrew rewss (M12X1 (M12X1.25 .25mm mm for for metric metric pump pumps) s) as shown in Figure 5-13 to set end travel.
Packing (1)* - Dimensions
3/4 sq square x 5.25 ID ID x 6.75 OD OD
No. of rings pe p er St S tuffing Box
4
Lip Seal (5-1), Floating Floating Bearing Outer Out er Cap
Johns Manville Manville Type Type LUP (2 req.) req.) 5.25 5.2 5 sha shaft ft dia dia.. 6.25 bore dia. 1/2 wide Johns Manville Manville Type Type LUP (1 req.) req.) 3.74 3.7 4 sha shaft ft dia dia.. 4.528 bore dia. .472 wid wide e
Body Gasket (101-3 and 101-4)** Qty. Floating Bearing End
6
.010 thick
Qty. Fixed Bearing End
6
.010 thick
Cone Gaskets (104-2 and 105-3) .010 thick, Qty.
1
.010 thick
Floating Bearing (119)
Taper rolle rollerr beari bearing ng Timken Timken Set 2 Cones No. 71450 71450 1Cup No. 7151D 1 Spacer No. X3S-71450 X3S-71450 Bench Play Play 0.012 inch inch
Fixed Bearing (120)
* Contact your Nash Representativ Representative e for required packing packing material material specification. ** Quantities listed are for trial assembly with extra extra gaskets at the fixed bearing end to allow removal of gaskets to obtain the final correct rotor (end) travel.
WARNING MAKE PROVISIONS FOR HANDLING HEAVY PARTS DURING DISASSEMBLY TO AVOID INJURY TO PERSONNEL OR DAMAGE TO PARTS. PAR TS. REFER TO TABLE 5-2 FOR APPROXIMATE APPROXIMA TE WEIGHTS WEIGH TS OF PARTS. Fabricated Tools a. Bushi Bushing ng or pipe secti section on as speci specified fied in Paragr Paragraph aph 5-6, step d (required only if rotor or shaft shaft requires replacereplacement). b. Jac Jack k bac back-u k-up p pla plate te (Fi (Figur guree 5.2) 5.2).. c. Sp Spli litt Ring Ring (Fi (Figu gure re 5.2 5.2). ). d. Ei Eigh ghtt spa space cers rs (F (Fig igur uree 5.2) 5.2).. e. Sh Shaf aftt sle sleev evee to tool ol (F (Fig igur uree 5.7 5.7). ).
Note Machinist’ss hammer and brass drift can be substituted Machinist’ if spanner wrench is not available.
f. g. h. I. j. k. l.
TC-11 Iron
Lip Seal (5), Floating and Fixed Bearing Beari ng Inner Caps
Standard Tools a. Soc Socket ket wre wrench nch set wit with h shaft shaft ext extens ension ion.. In most most cas cases, es, open-end or box wrenches can be substituted for socket wrenches. b. He Hexa xago gona nall (All (Allen en)) wren wrench ches es.. c. Spa Spanne nnerr wrench wrench (for (for fixe fixed d bearin bearing g locknu locknut). t).
d. e.
Partt Nam Par Name e (See Figur Figure e 5-15.)
Beaari Be rin ng pul pulle lerr. Press: approx Press: approximat imately ely 80-to 80-ton n capaci capacity ty.. Press must indic indicate ate amount of force applied and is only required if rotor or shaft requires replacement. Spirit le level. Leaf Le af (f (fee eele ler) r) ga gaug uge. e. Meta Me tall str strai aigh ghte tedg dge. e. Rawhide ma mallet. Machinis Mach inist’ t’ss dial indi indicato catorr with suit suitable able clam clamps ps and moun mounts. ts. Need Ne edle le-n -nos osed ed pli plier ers. s. Propan Pro panee torch torch and and 250ºF 250ºF (121º (121ºC) C) temp temp stick stick (req (requir uired ed only only
Note Do not disassemble the pump beyond the point required to remedy the trouble that has been observed. Before disassembling disassembling the pump, remove the drain plugs (22, 22-1, Figure 5-15) from the floating and fixed bearing end heads (102 and 103) to drain all liquid from the pump. Fasten mounting feet of drive end head to level surface. 9
I.
Fabricate Fabric ate jack jack backu backup p plate, plate, thre threee spacer spacerss and split split ring ring as shown in Figure 5-2. Thread one inner nut (5, Figure 5-3) each onto four ½13 by 36-inch long tensile steel rods approximately 3 ½ inches from end of rod and install flat washers (3) against nuts. Slidee fixed Slid fixed beari bearing ng inner inner cap cap back back to to gland gland studs studs far far enough to insert split ring between fixed bearing and inner cap. Make sure the split ring is on shaft chamfer and oriented the same way as the shaft chamfer.
j.
k.
l. Align four holes in split ring ring with tapped holes holes in fixed bearing inner cap; insert four spacers between split ring and inner cap; insert threaded rods (end with nuts installed) through split ring and spacers, and thread through holes in inner cap until flat washers bear against split ring. Secure threaded rods with flat washers and outer nuts tightened tightened against inner cup flange. Tighten Tighten inner nuts. m. Insta Install ll jack backup backup plate, plate, fabric fabricated ated in step step j, on thread threaded ed rods and secure with flat washers, lockwashers and nuts on ends of rods. Support backup plate until hydraulic jack applies sufficient pressure in step n to hold plate in place. Table 5-2 Approximate Weights of Parts Figure 5-15 Index No. 101 103. 10 3. Fixed Fixed B Bear earing ing End Head 109. 10 9. Fix Fixed ed Beari Bearing ng Brack Bracket et
109-1. 109 -1. Bearin Bearing g Bra Bracke ckett Screw (Jackscrew)
102
Figure 5-1. Removing Fixed Bearing Bracket
5-2 Disassembling Fixed Fixed Bearing End a.
b.
c. d. e.
f.
g.
h.
Remove three Remove three fixe fixed d bearing bearing oute outerr cap cap screws screws (11 (117-1, 7-1, Figure 5-15), four nuts (117-4), four screws (117-2) and fixed bearing outer cap (117) (117) from fixed bearing bracket (109). Remove Rem ove shim shims. s. Discar Discard d any damag damaged ed metal metal shim shimss and all paper shims, if present. Measure and record total thickness of shims and gaskets. Removee and Remov and discar discard d fixed fixed beari bearing ng ring ring gaske gaskett (120-3) (120-3).. Remove Rem ove fou fourr fixed fixed bea bearin ring g brack bracket et scre screws. ws. Install two Install two straps straps and chain chain hoist aroun around d two top ribs of fixed bearing bracket as shown in Figure 5-1. Support but do not lift bearing bracket. Install Inst all two bear bearing ing brac bracket ket scre screws ws in in tapped tapped hole holess in flange of fixed bearing bracket to serve as jackscrews (See Figure 5-1). Tighten Ti ghten two jacksc jackscrews rews insta installed lled in step step f evenl evenly y until until bearing bracket flange is free of head. Using chain hoist, carefully slide bearing bracket brac ket off fixed bearing and shaft. Remove two jackscrews. Bend tab of fixed fixed beari bearing ng lockwas lockwasher her (120(120-2, 2, Figure Figure 515) out of notch in fixed bearing locknut (120-1). Using spanner wrench or punch and hammer, loosen and remove locknut and lockwasher lockwasher..
Partt Nam Par Name e B ody Floating Bearing End Head
Weight-Pounds TC-11 Iron 1320 528
103
Fixed Bearin Bearing g End Head
532
104
Floating Bearing End Cone
121
105
Fixed Bearin Bearing g End Cone
95
108 109
Floating and Fixed Bearing Bracket
138 each
110
R o to r
1166
111 11 1
Shaft
520
119
Floating Bearing
120
Fixed Fix ed Bear Bearing ing
-
Tota otall Pump
35 each 4700
CAUTION MAKE CERTAIN THAT HYDRAULIC JACK, BACKUP PLATE, PLATE, SPLIT RINGS AND CAP ARE SQUARE AND THA THAT T FORCE IS APPLIED EVENLY TO AVOID DAMAGE. n.
10
Place hydra hydraulic ulic jack betwe between en jack jack backup backup plate and end end of shaft. Apply pressure to remove bearing. Discard bearing.
Pump Model
A
B
Θ
TC-11
9/16
5.25
15
o
C
D(Ref)
E
F(Ref)
G
H(Ref)
J(Ref) J(
K
Notes
9.125
1/2
11
1
0.87
0.622
0.84
0.24
234
Notes 1. Dimensions are in inches and angles angles are in degrees, degrees, unless otherwise noted. 2. Dimension B,C, and K tolerances : ±0.010 inch. 3. Material: Boiler plate for for split ring and jack backup plate. 4. Make fixed and floating bearing end spacers from 1/2-inch steel steel pipe, 4 each
Figure 5-2. Bearing Pulling Tools
1. 2. 3. 4. 5. 6. 7. 8. 9. 118. 11 8. 120. 12 0.
Figure 5-3. Pulling Bearing 11
Oute terr Nut Nut Lock Lo ckwa wash sher er Flat Fl at wa wash sher er Thre Th read aded ed Rod Rod Inn In ner Nu Nut Spacer Spllit ri Sp rin ng Hydr Hy drau auli licc jac jack k Jack Jac k bac backu kup p plat platee Breari Bre aring ng inne innerr cap cap Brea Br eari ring ng
o. p. q. r. s. t. u.
v.
w. x.
y.
Remove jack Remove jack backup backup plate plate,, threade threaded d rods, rods, spacers spacers and and split ring. Remove fixed fixed bearing inner cap. Removee lip Remov lip seal seal (5) (5) from from inner inner cap cap and and discard discard lip seal. seal. Remove Rem ove slin slinger ger spri spring ng (3-1) (3-1) and and sling slinger er (3) (3) from from shaft. shaft. Suppor Sup portt idle idle end head head side side of of body body with with a wedge wedge plate plate or or support cradle at the bottom, as shown in Figure 5-4. Remove Rem ove ten ten fixe fixed d beari bearing ng end end head head screws screws (103 (103-4) -4).. Remove Rem ove two 2 inch inch pip pipee plug plugss (22(22-1) 1) on top top of of idl idlee end end head or disconnect associated piping connected between these plug openings. Replace with two 2 inch inch bushings with 3/4 -11 -11 eye bolts and nut attached to bushing. Connect chain hoist to eye bolts as shown in Figure 5-4. Making Makin g sure sure the the body body (101) (101) is proper properly ly suppor supported, ted, slide fixed bearing end head and cone con e assembly off shaft, taking up on chain hoist to support head. Remove body gaskets (101-4). (101-4). Record number number of gaskets removed and discard baskets. Removee two glan Remov gland d nuts (103(103-1) 1) from studs (103(103-2) 2) and remove gland assembly (112) from head. Also remove packing (1) and lantern gland (10) from head. Discard packing. If gland gland studs (103(103-2) 2) requir requiree replace replacement, ment, heat base of
z.
stud to 250ºF (121ºC) maximum, using propane torch and 250ºF (121ºC) temp stick, to free Loctite 242 and remove stud. Inspec Ins pectt fixed fixed bearin bearing g end cone cone (105) (105) as spec specifi ified ed in Paragraph 5-9.
5-3. Disassembling Floating Bearing End a. b.
c. d.
e.
f. g. h. I.
Remove shaft Remove shaft key key (111-1, (111-1, Figur Figuree 5-15) 5-15) from from shaft shaft (111). (111). Remove Remo ve four four floati floating ng beari bearing ng outer outer cap cap nuts nuts (115-2 (115-2), ), screws (115-1) floating bearing outer cap (115) and gasket (115-3) from floating bearing bracket (108). Discard gasket. Remove Rem ove lip lip seal seal (5-1) (5-1) from from floa floatin ting g bearin bearing g outer outer cap. cap. Discard lip seal. Removee four Remov four floati floating ng bearin bearing g bracket bracket scre screws ws (108-1) (108-1) and floating bearing bracket from floating bearing end head (102) in the same manner as specified for fixed bearing bracket (109) in paragraph 5-2, steps d thru g. Perfor Per form m same same proced procedure ure as as specifi specified ed in Parag Paragrap raph h 5-2, steps h and j thru o. Remove floating bearing (119) from bearing journal on shaft (111). Remove Rem ove fl floa oati ting ng bea beari ring ng inn inner er cap cap.. Remove Rem ove floati floating ng bearing bearing inner inner cap cap gasket gasket (116(116-3) 3) and discard gasket. Removee lip Remov lip seal seal (5) (5) from from floati floating ng bearing bearing inner cap. Discard lip seal. Remove Rem ove tens tension ion spri spring ng (3-1) (3-1) and and sling slinger er (3) (3) from from shaft shaft..
5-4 Removing Rotor and Shaft Assembly Assembly a.
b.
c.
Support fixed Support fixed beari bearing ng end end of shaf shaftt (11 (111, Figure Figure 5-15) with strap using chain hoist (Figure 5-8) and slide shaft and rotor (110) assembly out of body (101). As soon soon as rotor exten extends ds beyond beyond body body,, support support rotor with sling and chain hoist as shown in Figure 5-8. Reposition sling to point of balance as rotor and shaft assembly is removed. Inspect Insp ect rotor rotor tape tapered red bores bores and shaft shaft as specif specified ied in in Paragraphs 5-10 and 5-11.
5-5 Removing Body/Floating Bearing End Head and Cone Assembly a. b. c. d. e. f. g. 1. Eyebolt 2. Wedge edgepl plat atee 101. Body
103. 10 3. Fixed Fixed Bea Bearin ring g End End Head 10310 3-4. 4. He Head ad Sc Scre rew w
h.
Figure 5-4. Removing Idle End End Head And Cone Cone Assembly 12
Connect chain Connect chain hoi hoist st to str straps aps arou around nd the the body body to support but do not lift body. Remove Remo ve 13 floa floating ting beari bearing ng end end head head screws screws (102 (102-4). -4). Remove Rem ove body body from from floa floatin ting g bearin bearing g end head head and and cone cone assembly . Remove Remo ve body gask gaskets ets (101 (101-3) -3).. Reco Record rd numb number er of gaskets removed and discard gaskets. Remove Remo ve two two gland gland nuts (102 (102-1) -1) from stud studss (102-2 (102-2)) and remove gland assembly (112) from head. Remove Remo ve packi packing ng (1) (1) and and lante lantern rn gland gland (10) fro from m head. head. Discard packing. If gland gland studs (102(102-2) 2) requir requiree replace replacement ment,, heat heat base base of stud to 250ºF (121ºC) maximum, using propane torch and 250ºF (121ºC) temp stick, to free Loctite 242 and remove stud. Inspect Insp ect float floating ing beari bearing ng end end cone cone (104) (104) as as specif specified ied in Paragraph 5-9
5-6 Removing Rotor From Shaft
5-8 INSPECTION OF DISASSEMBLED DISASSEMBLED PARTS PARTS
If inspection of the rotor (Paragraph 5-10) or the shaft (Paragraph 5-11) indicates that either part requires replacement or repair which requires disassembly, proceed as follows: a. Meas Measure ure and reco record rd dime dimensio nsion n A, Figu Figure re 5-7, 5-7, from outer face of rotor taper bore to floating bearing journal jour nal sho shoulde ulde r. b. Threa Thread d floatin floating g and fixed beari bearing ng locknut locknutss (119-1 (119-1 and 120-1, Figure 5-15) on shaft to protect threads. c. Lift rotor and shaft shaft assem assembly bly with with chain chain hoist and sling sling.. d. Sli Slide de bushing bushing or or pipe secti section on sized sized to fit fit over fixed fixed beari bearing ng end of shaft with face of bushing contacting rotor hub face only. Note Press with 80-ton capacity is required. e.
f.
g. h.
With the pump disassembled, inspect the parts for wear as described in the following paragraphs. Note If there is any question about the reusability or repair of worn major pump parts, contact your local Nash Representative.
5-9 Cones Normally worn tapered surfaces of the cones will be smooth, requiring only cleaning and light filing around the ports and tips. tips. If foreign material has entered the pump suction inlet during operation, circular score marks may be noticed around the outside of the cone tapers. Inspect the cones for damage and wear as follows: Check for uneven wear and scoring between the ports and at the edges of the ports with a straightedge and feeler gauge as shown in figure 5-5. Localized wear or scoring not more than 0.030-inch deep is acceptable unless the pump is required to operate at or near maximum capacity. Replace the cone if the localized wear or scoring exceeds 0.030 inch in depth. Minor pitting is acceptable. Note A cone with uneven wear or scoring may be repaired by building up the surface by flame spraying and remachining. Contact your Nash Representative for specific requirements and dimensions before attempting any repairs.
Position rotor Position rotor and shaft shaft assem assembly bly in in press press lar large ge enough enough to handle rotor diameter with floating bearing end of shaft against press ram and bushing, installed in step d, against press backup plate. Makee provis Mak provision ion to to suppor supportt fixed fixed beari bearing ng end end of shaft shaft as as it is pushed from rotor. rotor. Support rotor with blocks or sling passed through rotor blades and around each shroud. Make cert certain ain that that shaft shaft is level level and apply apply ram ram force force to to remove shaft from rotor. If rotor rotor taper bore is to to be machi machined ned oversi oversize, ze, contact contact your local Nash representative for guidance on dimensions to be used.
5-7 Removing Cone from Head If inspection of the cone (Paragraph 5-9) indicates that the cone must be replaced or reworked, proceed as follows: a. Ins Insert ert Alle Allen n wrench wrench in sock socket et of each each cone cone scre screw w (104-1 (104-1 or 105-1, Figure 5-15) in turn; tap Allen wrench with mallet as shown in Figure 5-5 to loosen and remove eight cone screws.
The cones have an 8-degree taper. taper. If the cone tapered surface is worn or requires light machining, additional gaskets (104-3 or 105-3, Figure 5-15) must be added between the cone (104 or 105) and the head (102 or 103) during reassembly to compensate for the total amount of material removed on a 7 to 1 ratio. For example, if 0.003 inch is removed from the cone tapered surface, 0.021-inch additional thickness of gaskets is required. Gaskets supplied are 0.010in thick each; therefore, two to three gaskets per cone must be added. The maximum total thickness of gaskets that can be placed under each cone is 0.050 inch.
Figure 5-5. Loosenin Loosening g Cone Screws b.
c. d.
Tap side side of floa floating ting or fixed fixed bearin bearing g end cone (104 (104 or 105) with soft-headed mallet to free cone from head (102 or 103). Pull Pu ll co cone ne fr from om he head ad.. Remove Rem ove gas gasket ketss (104 (104-3 -3 or 105105-3). 3). Rec Record ord num number ber of gaskets removed and discard gaskets. Figure 5-6. Checking Cone for Wear 13
a.
5-10 Rotor Inspect the taper cone bores of the rotor on the same basis as the tapered surface of the cones as follows: Check for uneven wear, undercutting or scalloping on the cone bore tapered surface with a straightedge and feeler gauge in a manner similar to that shown in Figure 5-6. Localized wear, undercutting or scalloping not more than 0.030-inch deep is acceptable. Replace the rotor if localized wear, undercutting or scalloping exceeds 0.030 inch in depth. Minor pitting is acceptable. If the rotor tapered bore is worn or requires light machining, the total amount of material that is removed must be compensated for on a 7 to 1 ratio by placing gaskets (1043 and 105-3, Figure 5-15) under the cones in the same manner as specified in Paragraph 5-9. The maximum total thickness of gaskets that can be placed under each cone is as specified in Paragraph 5-9.
File taper bores of rotor (1 (110, 10, Figur Figuree 5-15) to remo remove ve burrs and high spots. Check shaft for dent dentss or rough spots on rotor rotor seat and bearing journals. Ston St onee or po poli lish sh sha shaft ft sm smoo ooth th..
b. c.
Allowable Force Tons Pump Size
TC-11
d.
5-11 Shaft Check the shaft diameters on which the packing seats for excessive wear. If the shaft is scored or worn through the metalized surface, remove the metalizing, clean the shaft thoroughly, and remetalize. Contact your Nash Representative for procedures and dimensions required.
e.
f.
5-12 REASSEMBLING PUMP CAUTION THOROUGHLY CLEAN ALL PARTS BEFORE REAS- SEMBLY SEMBLY. BE SURE TO REMOVE ALL OLD GASKET MA MATERIAL TERIAL FROM MOUNTING FLANGES. REMOVE BURRS FROM MATING SURFACES AND MOUNTING FACES.
g. h.
5-13 Reassembling Rotor and Shaft To reassemble the rotor on the shaft, proceed as follows: CAUTION THIS PROCEDURE APPLIES TO ASSEMBLY OF IRON ROTOR ON STEEL SHAFT ONLY.
I.
Shaft/Rotor at Same Temperature
Shaft/Rotor Temperature o Differential of 20 F
Maximum Minimum Minimum
Minimum
56
20
Appr Ap prox oxim imat atel ely y 5 to tons ns
Coat roto rotorr hub bore and rotor rotor seat of shaft shaft with Moly Molykote kote G-n paste, or equivalent, to prevent damage from friction or pick-up when shaft is pressed into rotor. Thread Thre ad fixed fixed beari bearing ng locknu locknutt (120-1) (120-1) and float floating ing beari bearing ng locknut (119-1) on shaft to protect threads. Place an ice pack around shaft diameter to be pressed into rotor. Check Chec k for prope properr rotati rotation on of roto rotorr prior prior to asse assembl mbly y. When the shaft temperature where the ice pack is placed is approximately 20° F below room temperature, remove ice pack. Slide floating bearing end end of shaft (111) (111) into rotor making certain that rotor blades curve in clockwise direction viewed from from floating bearing bearing end. Gently tap fixed end of shaft with soft-headed mallet. Slide same bushi bushing ng or pipe secti section on used used in disas disassemb sembly ly,, on floating bearing bearing end of shaft. (See Figure 5-7.) Sling rotor and shaft by a sling place placed d around around outsi outside de diameter at point of balance and place rotor and shaft in press with fixed bearing end of shaft in line with ram end of press and face of bushing or pipe section conta cting rotor hub face only, with bushing or pipe section supported by press backup plate. Level rotor shaft assembly assembly. Press Pre ss shaft shaft into into roto rotorr until until dimen dimensio sion n A, Figure Figure 5-7, 5-7, from from outer face of rotor taper bore to floating bearing journal shoulder is within limits limits specified. Record force applied. Maximum allowable force and minimum allowable force are noted on chart below. CAUTION 1.Press Backup Plate 2. Bushing or Pipe Section 3.Press Ram
Pump S iz ize
D im imension A I nc nches
TC-11
11 25/32 to 11 27/32
Figure 5-7. Pressing Rotor onto shaft 14
IF ASSEMBLY FORCE RECORDED IS NOT WITHIN LIMITS SPECIFIED ABOVE, DO NOT INSTALL ASSEMBLED ROTOR AND SHAFT IN VACUUM PUMP. CONTACT YOUR LOCAL NASH REPRESENTATIVE TO DETERMINE WHETHER ROTOR AND/ OR SHAFT MUST BE REPLACED.
attention to edges of cone ports. c. Appl Apply y light light coat coat of grea grease se to repl replacem acement ent cone cone gaske gaskets ts (104-3 or 105-3, Figure 5-15) equal to number removed at disassembly, disassembly, and position gaskets on head (102 or 103). If rotor or cone has been remachined remachined as described in Paragraphs 5-9 and 5-10, install additional gaskets in accordance with requirements specified in Paragraphs 5-9 and 5-10. d. Insta Install ll two 3/4 eye bolts in holes holes 180º apar apartt for for drive end head or use 2 inch bushings with eye bolts for idle end head as described in paragraph 5.2. Remove bolts fastening mounting feet of drive end head to level surface. Lay down heads so that the surface with cone side is up. e. Lower cone into plac placee on asso associat ciated ed head head maki making ng certain that eight holes in cone flange align with tapped holes in head. Thread in eight socket head cone screws (104-1 or 105-1) and tighten screws. f. After tigh tighteni tening ng screws, screws, tap tap Allen Allen wrench wrench with with mallet mallet to finish tightening each screw.
WARNING BEFORE REMOVING ROTOR AND SHAFT ASSEMBLY ASSEMBL Y FROM PRESS, MO VE SLING TO NEW POINT OF BALANCE TO AVOID INJURY OR DAMAGE. j.
Remov e beari Remove bearing ng locknuts lock nuts (119-1 (119 -1 and 120-1) 120- 1) from idle idl e and drive ends of shaft.
5-14 Installing Cone in Head If one or both the head and cone assemblies have been disassembled,, reassemble them as follows: disassembled a. If new new cone is being being insta installe lled, d, check check it care carefull fully y against old cone for correct part number and remove rust preventative from surfaces with solvent such as kerosene. b. File tape taperr surface surfacess on the the cone cone smooth smooth,, paying paying special special
2. Wed edge gepl plat atee 101. Body
110. Rotor 111. Shaft
Figure 5-8. Installing Rotor and Shaft Assembly 15
Note Do not install five screws (103-4) at this time since it may be necessary to remove head to remove gaskets (101-4) to obtain proper end travel. travel. (Refer to Paragraph 5-21.)
5-15 Installing Body onto Floating Bearing End Head and Cone Assembly a. b.
c.
d.
e.
Fasten Fas ten moun mountin ting g feet feet of drive drive end end head head (102) (102) to to level level surface. If gland gland studs (102(102-2, 2, Figure Figure 5-15) have been remo removed, ved, install new studs as follows: 1. Apply Locqu Locquic ic Primer Primer T to tappe tapped d holes holes in in head head and stud threads. Allow primer to to dry. 2. Apply Locti Loctite te 242 to stud stud threads threads and install install studs in head. Apply App ly light light coat coat of of grease grease to to each each of six six new floa floatin ting g bearing end body gaskets (101-3) and position gaskets on floating bearing end head (102). Using Usi ng strap strapss and chain chain hois hoist, t, positi position on body body onto onto head and cone assembly. assembly. Make certain that head head rabbet seats in body bore and that 13 mounting holes in head align with tapped holes in body. Support idle end side of body with a wedge plate or supporting cradle. Secure Sec ure hea head d to bod body y with with 13 13 screw screwss (102(102-4). 4).
5-18 Assembling Floating and Fixed Bearing Ends a.
Install new Install new lip lip seals seals (5, (5, Figure Figure 5-15) in floati floating ng and and fixed fixed bearing inner caps (116 and 118) as follows: 1. Apply light coat of grease grease to OD and sealin sealing g lips lips of lip seals. 2. Inst Install all lip lip seals seals in caps caps with sealin sealing g lips facin facing g away from bearing housing. Make certain that that lip seals are properly seated.
b. c. d.
Install Insta ll slinge slingers rs (3) (3) on float floating ing and and fixed fixed bearin bearing g ends of shaft (111). Install Insta ll floati floating ng and and fixed fixed bearin bearing g inner inner caps caps and and floatin floating g bearing inner cap gasket (116-3) on shaft. Slidee slingers Slid slingers and inner inner caps beyon beyond d bearing bearing jour journal nal shoulder toward heads.
5-19 Installing Fixed Bearing a.
1. Tapered C Co one Be Bearing 3. Be Bear arin ing g Spa Space cerr
2. Be Bearing Cup
b.
Figure 5-9. T Tapered apered Roller Bearing Assembly Exploded View
Move shaft Move shaft towa toward rd fixed fixed bear bearing ing end end of pump pump so so that that rotor taper bore rides up on fixed bearing end to ensure that shaft is centered in bearing housing. This can be accomplished by using a soft-faced hammer or ram to impact floating bearing end of shaft. Push Pus h fixed fixed bear bearing ing inne innerr cap cap back back toward toward head head.. Note Make certain that bearing locknuts (119-1 and 120-1) have been removed from shaft.
5-16 Installing Rotor and Shaft Assembly Assembly a.
b.
Lift rotor and shaft shaft assem assembly bly with with sling sling and chain chain hoist as shown in Figure 5-8 and install floating bearing end of shaft into body (101). Keep movin moving g rotor rotor and shaft shaft assem assembly bly,, adjustin adjusting g position position of sling as necessary, until shaft passes through floating bearing end cone (104) and head (102), and rotor taper bore seats on cone.
CAUTION MAKE CERTAIN THAT BEARING CUP AND SPACER SP ACER SUPPLIED WITH TAPERED ROLLER BEARINGS ARE NOT MISPLACED WHEN TAPERED CONES ARE B EING HEATED. HEATED. (SEE FIGURE 5-9). CUP, SPACER AND TAPERED CONES ARE SUPPLIED SU PPLIED AS A MATCHED MATCHED SET; CUP AND/OR SPACER FROM ONE SET SHALL NOT BE USED WITH TAPERED CONES FROM ANOTHER SET. SET. SERIOUS CLEARANCE ERRORS CAN RESULT IF THIS CAUTION IS NOT OBSERVED.
5-17 Installing Fixed Bearing End Head and Cone Assembly on Body a.
b.
c.
d.
If gland gland studs (103(103-2, 2, Figure Figure 5-15) have been remo removed, ved, install new studs as follows: 1. Apply Locqui Locquicc Primer Primer T to tappe tapped d holes holes in in head head and stud threads. Allow primer to to dry. 2. Apply Locti Loctite te 242 to stud stud threads threads and install install studs in head. Apply Appl y light light coat coat of grea grease se to each of six six new fixed fixed bear bearing ing end body gaskets (101-4) and position gaskets on fixed bearing end head (103). Using eye bolts and chain chain hoist as specif specified ied in Paragr Paragraph aph 5-2, step u, slide head and cone assembly over shaft (11 (111) 1) onto body. Make certain that head rabbet seats in body bore and that 10 mounting holes in head align with tapped holes in body. Secure Sec ure hea head d to body body with with five five scre screws ws (103(103-4). 4).
c.
Heat two taper tapered ed cones cones of fixed fixed beari bearing ng set, set, using using hot air over and 250ºF (121ºC) temp stick, to 240º to 250ºF (116º to 121ºC). CAUTION DO NOT HEAT BEARING CUP OR SPACER. WARNING USE THERMALLY INSULATED GLOVES WHEN HANDLING HEA HEATED TED TAPERED CONE BEARING TO AVOID SERIOUS BURNS.
16
A
B
C
D
E
F 1. Bear Bearin ing g Jour Journa nall 2. In Inne nerr Tap Taper ered ed Cone Bearing 3. Be Bear arin ing g Cup Cup
4. Bear Bearin ing g Spa Space cerr 5. Out Outer er Tape apered red Con Conee Bearing
Figure 5-10. Installing Fixed Bearing 17
6. Fixe Fixed d Be Bear arin ing g Lockwasher 7. Fix Fixed ed Bear Bearing ing Loc Lockn knut ut 8. Sp Span anne nerr Wre Wrenc nch h
d.
Remove one tape Remove tapered red cone cone from from heate heaterr or oven. Posit Position ion large end of taper toward shaft and line up ID of bearing with shaft OD.
j.
Using thermally insulated gloves, remove second tapered cone bearing from heater heater or oven. Position small end of taper towards shaft and line up ID of bearing with OD of shaft. k. Obser Observing ving preca precaution ution in Note Note precedi preceding ng step step e and using using smooth, swift motion, center bearing on shaft and push bearing onto bearing journal until spacer installed in step I is wedged between two tapered cone bearing. (See Figure 5-10, Part D.) l. Qui Quickl ckly y instal installl fixed fixed beari bearing ng lockn locknut ut (120(120-1) 1) on shaft shaft,, carefully engage threads and tighten with spanner wrench or punch and hammer. (See Figure 5-10, part F). m. When beari bearing ng has has cooled, cooled, proce proceed ed as foll follows: ows: 1. Rem Remove ove locknu locknutt from from shaft, shaft, drive drive bearin bearing g home using bearing pusher. 2. Ins Install tall fixed fixed lockw lockwashe asherr 120-2 120-2 (Figure (Figure 5-15), 5-15), as as shown in Figure 5-10, Part F, with inner tab in slot in shaft. 3. Rei Reinsta nstall ll bearing bearing locknut locknut,, tighten tighten with spanner spanner wrench and mallet, or punch and hammer, until slot in locknut aligns with tab on lockwasher. 4. Ben Bend d lockwas lockwasher her tab tab into into locknut locknut slot slot.. n. Insta Install ll new new outer outer bearin bearing g ring ring gasket gasket (120(120-3, 3, Figure Figure 515) over shaft and against bearing. o. Insta Install ll fixed fixed beari bearing ng outer outer cap (117 (117)) on beari bearing ng bracket bracket (109). p. Align holes of inner inner and and outer outer caps caps with with holes holes in bearing bearing bracket and secure with four screws (117-2) and nuts (117-4).
Note The following step must be performed as rapidly as possible. As soon as heated tapered cone contacts shaft, it will cool rapidly and contract. Contraction may be sufficient to cause bearing to seize at the wrong location on the shaft, requiring that the bearing be pulled, reheated and reinstalled. e.
f. g.
Using Usi ng one one smooth smooth,, swift swift motion motion,, center center bear bearing ing on on shaft and push bearing onto bearing journal until it contacts bearing journal shoulder. (See Figure 5-10, Parts A and B.) MAKE CERTAIN CERTAIN THAT THAT TAPERED TAPERED CONE IS SEATED AGAINST BEARING JOURNAL SHOUL- DER. A bearing pusher pusher may have to be used used to tap bearing if the bearing is not contacting the bearing journal shoulder. Install Inst all chain chainss around around two two top top ribs ribs of beari bearing ng bracke brackett (109) (109) as shown in Figure 5-1. Lift bearing bracket into position. Install Insta ll fixed fixed beari bearing ng bracket bracket (109) on head head and and secure secure each with four screws (109-1). Note Make sure that pipe plugs (22) are installed in brackets.
h.
I.
Install beari Install bearing ng cup cup over over tapere tapered d cone cone bearin bearing g instal installed led in step e being careful not to jam bearing cup in bearing bracket and making certain that cup is seated properly on tapered cone bearing. (See Figure 5-10, Part B.) Slide Sli de beari bearing ng space spacerr over over shaft shaft and and into into bearin bearing g bracke brackett until it contacts tapered cone bearing. (See Figure 5-10, Part C.)
5-20 Installing Floating Floating Bearing (119) (119) a.
Install Inst all floa floating ting beari bearing ng onto onto shaft shaft in in the same mann manner er as specified in paragraph 5-19, steps b thru m. Use associated parts. b. Move the rotor shaft shaft assembly away from the the cone to a position where the rotor shaft assembly can be easily rotated using a spanner wrench. Rotate shaft through a minimum of three revolutions. c. Ins Insert ert a fee feeler ler gage gage betwe between en the the high high point point of any
1. Threaded Rod 2. Di Dial al In Indi dica cato torr
1. Leaf (Feeler) Gauge
Figure 5-11. Measuring Bearing Bearing Roller-Cup Clearance
Figure 5-12. Measuring End Travel at Floating Bearing End 18
tapered cone bearing roller and the inner race of bearing cup as shown in Figure 5-11, to measure bearing roller cup clearance. Maximum allowable clearance at any point is 0.002". If clearance exceeds exceeds 0.002", bearing installation may be incorrect or all bearing parts may not be from matched set.
Note If number of gaskets to be removed is more than quantity installed or will result in only one gasket remaining, gaskets may have to be removed from floating bearing end or additional cone gaskets (104-3 and 105-3) may have to be added. Contact your Nash Representative for assistance in establishing acceptable end travel.
5-21 Setting End Travel Travel and Final Assembly a.
b.
c.
d. e.
f.
g.
h.
I.
Mount dial Mount dial indic indicator ator on float floating ing bear bearing ing end of of shaft shaft (111, Figure 5-15) with spindle of dial indicator on face of floating bearing bracket (108) as shown, Figure 5-12. Instal Ins talll three three ½-13 ½-13 screw screwss or M12-1 M12-1.75 .75 mm mm screws screws for for metric pumps(117-1, pumps(117-1, Figure 5-13) through fixed bearing outer cap into tapped holes in fixed bearing bracket to act as takeup screws. Gradually Gradua lly tight tighten en three three takeu takeup p screws screws equal equally ly until until shaft cannot be rotated with spanner wrench engaging keyway in drive end of shaft. DO NOT TIGHTEN TAKEUP SCREWS BEYOND THIS POINT. POINT. Rotor taper bore bore is now seated on floating bearing end cone. Zero dial indicator. Loosen Loo sen thre threee takeu takeup p screws screws at at least least 1/4 1/4 inch. inch. Install Inst all two ½-13 scre screws ws or or M12-1 M12-1.25 .25 mm mm screw screwss for for metric pumps (1, Figure 5-13) in tapped holes in fixed bearing outer cap to act as jackscrews. Gradua Gra dually lly tigh tighten ten two two jacks jackscre crews ws equal equally ly until until shaf shaftt cannot be rotated as specified in step c. DO NOT TIGHTEN JACKSCREWS BEYOND THIS POINT. Rotor taper bore is now seated on fixed bearing end core. Record dial indicator reading. Compare Comp are the the end end travel travel from step f with with the the chart chart below below.. If the recorded end travel is greater than the value specified in the chart, proceed to step h; if the value is less than the
j.
k.
3. Reassemble Reassemble fixed beari bearing ng end head to to body in same same manner as specified in Paragraph 5-17, steps c and d. 4. Remove jacks jackscrews crews (1, Figure Figure 5-13) and repeat repeat steps c through g to make certain that end travel is within limits. 5. If end trave travell is accepta acceptable, ble, instal installl five five fixed fixed bearing bearing end head screws (103-4). Subtract Subtr act the end trav travel el from from step f from from the the value value spec specifie ified d in the chart. If the difference difference is .010 or more, more, proceed to step k; if the difference is less than .010, proceed to step 1. Select Sele ct thickn thickness ess of of floati floating ng bearin bearing g end body body gasket gasketss (101-3) equal to difference calculated in step j; disassemble pump and install additional gaskets at
value specified in the chart, proceed to step j. Subtract Subtr act 0.125 0.125 inch inch for for iron iron pumps pumps from value reco recorded rded in step f. If difference is 0.010 inch or more, remove floating bearing end body gaskets (101-3) as specified in step I; if difference is less than 0.010 inch, end travel is within limits, proceed to step l. Remove Rem ove fix fixed ed bear bearing ing end body gas gaskets kets (10 (101-4) 1-4) as follows: 1. Rem Remove ove fiv fivee screw screwss (103(103-4). 4). CAUTION MAKE CERTAIN THAT THAT COMPLETE GASKET IS REMOVED WHEN PERFORMING STEP I.2. 1. Jac Jacks kscr crew ew 117. 11 7. Fi Fixe xed d Bea Beari ring ng Outer Cap 117-1 11 7-1.. Take up Scr Screw ewss
2. Move Move fixed fixed bearin bearing g end head head (103) (103) back back just just enough enough to insert jaws of needle-nosed pliers in space. Tear off thickness of body gaskets equal to value calculated in step h. Each gasket is 0.010-inch 0.010-inch thick.
117-2. Outer 117-2. Outer Cap Scr Screw ew 117-4 117 -4 Fi Fixe xed d Bear Bearin ing g Oute Outerr Cap Nut
Figure 55-13. 13. End Travel Travel Check Setup at Fixed Bearing End 19
floating bearing end as follows: 1. Remove dial indic indicator ator from float floating ing beari bearing ng end end of shaft (111). 2. Remo Remove ve floatin floating g bearing bearing bracke brackett (108), (108), floatin floating g bearing (119) and associated parts as specified in Paragraph 5-3, steps d through I. 3. Remov Removee floatin floating g bearing bearing end head head (102) (102) by by removremoving thirteen floating bearing end screws (102-4). 4. Apply light coat of grease grease to each each additi additional onal body gasket and install each separately against body gaskets previously installed. 5. Reins Reinstall tall float floating ing bearing bearing end head head as speci specified fied in Paragraph 5-15, steps d and e. 6. Reins Reinstall tall float floating ing bearin bearing g bracket, bracket, floati floating ng bearing bearing and associated parts as specified in Paragraph 518, steps b through d, and Paragraph 5-20. 7. Repea Repeatt steps steps a throu through gh g to make make certai certain n that that end travel is within limits.
cap on fixed bearing bracket bracket (109). Align four holes in fixed bearing inner cap (118), bearing bracket and outer cap. Secure Secu re outer and inner caps with four screws (1172) and nuts (117-4). q. Sec Secure ure oute outerr cap to to bearing bearing brack bracket et with with three three screw screwss (117-1). r. Mak Makee certai certain n that that dial dial indica indicator tor read reading ing is is same same as value value recorded in step l within +/- 0.010 inch. Then remove dial indicator from shaft. s. Ins Instal talll fix fixed ed bear bearing ing end hea head d scr screws ews (10 (103-4) 3-4).. Mak Makee certain that shaft turns freely without rubbing or contact. t. Ins Instal talll new lip lip seal seal (5-1 (5-1)) in floa floatin ting g bearin bearing g outer outer cap cap (115) in same manner as specified in Paragraph 5-18, steps a.1 and a.2. u. Apply light coat of grease grease to new new floatin floating g bearing bearing outer cap gasket (115-3) and place gasket on outer cap. v. Sli Slide de floati floating ng bearin bearing g outer outer cap and and gasket gasket over over shaft shaft and position on floating bearing bracket (108). w. Align four holes holes in in floating floating bearin bearing g inner inner cap, bearin bearing g bracket and outer cap and secure caps with four screws (115-1) and nuts (115-2). x. Insta Install ll new packin packing g (1), (1), lanter lantern n glands glands (10) and gland assemblies (112) at floating and fixed bearing ends as specified in Paragraph 4-5.
l.
To center center roto rotorr, remove remove two two jacks jackscre crews ws (1, (1, Figure Figure 5-13) 5-13) and gradually tighten three takeup screws (117-1) equally until dial indicator reading is equal to one-half of final acceptable end travel reading. reading. Make certain that shaft turns freely without any rubbing rubbing or contact. Record dial indicator reading. m. Using leaf leaf (feeler (feeler)) gauge, gauge, measure measure gap between fixedbearing outer cap (117) and fixed bearing bracket (109) at four places 90 degrees apart. (See Figure 5-14) Add four measurements and divide sum by four to compute average gap. n. Selec Selectt combin combination ation of new new shims shims (4, Figure Figure 5-15) equal to average gap computed in step m. o. Remo Remove ve three three screws screws (117(117-1), 1), four four nuts nuts (117(117-4) 4) and screws (117-2) and remove fixed bearing outer cap (117). p. Posit Position ion shims shims selec selected ted in step step m and fixed fixed bear bearing ing outer outer
5-22 Bearing Lubrication Note Lubricate floating and fixed (119 & 120) bearings using grease specified in Table 4-1 prior to final assembly of outer caps (115 & 117). a. b.
c. d.
Remove Rem ove one one pipe pipe plug plug from from each each beari bearing ng brack bracket et (108 (108 & 109). Install grease fitting (not supplied) supplied) in each bracket. Using Usi ng hand hand grease grease gun, gun, pump pump greas greasee into into each each bearin bearing g through grease fitting, while rotating shaft by hand, until the grease just starts to squeeze out from the face of the bearing between the rollers. Do not add any grease to the caps. Removee grease Remov grease fitt fittings ings and replac replacee plugs plugs in each each bearin bearing g bracket. Comple Com plete te assem assembly bly of caps caps per per 5.21 5.21 q throug through h w. w. Note Before placing pump back into service, align coupling or V-belt drive as specified in Bulletin No. 642, Installation Instructions, Nash Vacuum Pumps and Compressors.
1. Lea Leaff (Fee (Feeler ler)) Gau Gauge ge 109. Fix 109. Fixed ed Beari Bearing ng Brack Bracket et 117. 11 7. Fix Fixed ed Beari Bearing ng Outer Outer Cap Cap
Figure 5-14. Measuring Shim Gap 20
NOTES
21
22-1 22-1
23 117-1 117-5
22-1 22-1
103-4
23-1
105-3
105
105-1
111 111
110
120-3
117 120-3
109
120-1 120
118
5
4
3 112 3-1
10 22
1
117-4
101-4
1
22
111-1
103-5 117-2
22
109-1
120-2
103-1 103-2
22-2
22-1
103
102-4
22
22-1
23 23-1 102-2
104 104-1
2 2
102-1
104-3 10
112
119-2 119-1
115-1
115-2 1
1
5-1 3 5 116 3-1
101-3 22 21
101
102-4
119
108
108-1 115-3
115
116-3
103-1
22 102
22
22
Figure 5-15. Typical Nash TC Two-Stage Two-Stage Vacuum Vacuum Pump, Exploded View
Legend for Figure 5-15 Index No.
2 3
*1 *3 *4 *5 * 5-1 * 10 21 22 22-1 22-2 22-3 23 1 01 * 101-3 * 10 1 01-4 1 02 102-1 102-2
Qty 8 Rings 2 AR 2 1 2 1 2 7 2 4 2 1 6 6 1 2 2
Part Name Packing S l i nge r S hi m Lip Seal Lip Seal Lantern Gland Oriface Plug P i pe P l ug Pipe Plug Pipe Plug Pipe Plug Grease Fitting B od y Floating Bearing End Body Gasket Fixed Bearing End Body Gasket Floating Bearing End Head Gland Nut Gland Nut
Index No. * 105-3 1 08 108-1 1 09 109-1 110 111 111-1 112 115 115-1 115-2 * 115-3 116 * 116 16-3 -3 117 117-1 117-2
Qty 1 1 4 1 4 1 1 1 2 1 4 4 1 1 1 1 3 4
Part Name Cone Gasket Floating Bearing Bracket Floating Bearing Bracket Screw Fixed Bearing Bracket Fixed Bearing Bracket Screw R o to r Shaft Floating Bearing End Shaft Key Gland Assembly Floating Bearing Outer Cap Outer Cap Screw Outer Cap Nut Outer Cap Gasket Floating Bearing Inner Cap Inner Cap Gasket Fixed Bearing Outer Cap Outer Cap Screw Outer Cap Screw
Legend for Figure 5-15 Index No.
2 3
*1 *3 *4 *5 * 5-1 * 10 21 22 22-1 22-2 22-3 23 1 01 * 101-3 * 10 1 01-4 1 02 102-1 102-2 102-4 1 03 103-1 103-2 103-4 103-5 1 04 104-1 * 104-3 1 05 105-1
Qty 8 Rings 2 AR 2 1 2 1 2 7 2 4 2 1 6 6 1 2 2 10 1 2 2 10 1 1 8 1 1 8
AR- As Required * Minimum recommended spares
Part Name Packing S l i nge r S hi m Lip Seal Lip Seal Lantern Gland Oriface Plug P i pe P l ug Pipe Plug Pipe Plug Pipe Plug Grease Fitting B od y Floating Bearing End Body Gasket Fixed Bearing End Body Gasket Floating Bearing End Head Gland Nut Gland Nut Floating Bearing End Head Screw Fixed Bearing End Head Gland Nut Gland Stud Fixed Bearing End Head Screw Fixed Bearing End Head Screw Floating Bearing End Cone Cone Screw Cone Gasket Fixed Bearing End Cone Cone Screw
Index No. * 105-3 1 08 108-1 1 09 109-1 110 111 111-1 112 115 115-1 115-2 * 115-3 116 * 116 16-3 -3 117 117-1 117-2 * 117-3 117-4 117-5 118 * 119 * 11 119-1 * 11 119-2 * 1 20 * 12 120-1 * 12 120-2 * 12 120-3
Qty 1 1 4 1 4 1 1 1 2 1 4 4 1 1 1 1 3 4 1 4 1 1 1 1 1 1 1 1 2
Part Name Cone Gasket Floating Bearing Bracket Floating Bearing Bracket Screw Fixed Bearing Bracket Fixed Bearing Bracket Screw R o to r Shaft Floating Bearing End Shaft Key Gland Assembly Floating Bearing Outer Cap Outer Cap Screw Outer Cap Nut Outer Cap Gasket Floating Bearing Inner Cap Inner Cap Gasket Fixed Bearing Outer Cap Outer Cap Screw Outer Cap Screw Outer Cap Gasket Outer Cap Nut Outer Cap Nameplate Fixed Bearing Inner Cap Floating Bearing Floating Bearing Locknut Floating Bearing LockWasher Fixed Bearing Fixed Bearing Locknut Fixed Bearing Lockwasher Fixed Bearing Ring Gasket
SALES & SERVICE INTERNATIONAL U.S.A., Trumbull, Connecticut The Nash Engineering Company 9 Trefoil Drive Trumbull Connecticut 06611-1330 203-459-3900, Fax 203-459-3988 Australia, Smithfield, NSW Nash Vacuum Systems Tel: (61) 02-725-5199 Fax: (61) 02-725-5128 Brazil, Campinas Nash do Brasil Bombas Ltda. Tel: (55) 192 455833 Fax: (55) 192 455773 England, Winsford, Cheshire Nash Engineering Co. G.B. Tel: (44) 606-594242 Fax: (44) 606-551994 Finland, Karhula A. Ahlstrom Corporation Tel: (358) 52 229 1111 Fax: (358) 52 63958 Germany, Oberusel Nash Pumpen, G.m.b.H. Tel: (49) 6171-58830 Fax: (49) 6171-59196 Japan, Tokyo Nash International Company Tel: (81) 3 3449 0771 Fax: (81) 3 3449 0746 Korea, Seoul Nash Korea Ltd. Tel: (82) 2 786-1854 Fax: (82) 2 786-1853 Netherlands Nash Benelux Tel: (31) 75 6470170 Fax: (31) 75 6470175 Southeast Asia, Singapore Nash International Company Tel: (65) 861-6801 Fax: (65) 861-5091 South Africa, Wadeville Vac-Cent Services (Pty) Ltd. Tel: (27) 11-8271536 Fax: (27) 11-8273590 Sweden, Stockholm Nash Hytor AB Tel: (46) 8 444 5470 Fax: (46) 8 444 5474 CHEMICAL DIVISION SALES Division Headquarters Elizabeth, Pennsylvania Tel: 412-384-3610 Fax: 412-384-4880 Alabama, Birmingham Nash U.S. 205-951-2721, Fax 205-951-2724
California, Los Angeles Nash U.S. 714-573-4949, Fax 714-573-1291 Illinois, Chicago Nash U.S. 630-241-7300, Fax 630-241-7313 New Jersey, Belmar Nash U.S. 908-681-4726, Fax 908-681-1544 Ohio, Cleveland Nash U.S. 216-934-1491, Fax 216-934-1492 Texas, Houston Nash U.S. 713-821-9514, Fax 713-821-9012 GENERAL INDUSTRIAL SALES Division Headquarters Trumbull, Connecticut Tel: 203-459-3716 Fax: 203-459-3921 California, Los Angeles Nash U.S. 714-573-4949, Fax 714-573-1291 Missouri, St Louis Nash U.S. 314-298-8843, Fax 314-298-1818 North Carolina, Charlotte Nash U.S. 704-892-8824, Fax 704-892-6623 New Jersey, Warren Nash U.S. 908-903-0359, Fax 908-903-0787 Ohio, Cleveland Nash U.S. 513-777-8237, Fax 513-777-8239 U.S. PAPER DIVISION SALES Division Headquarters Clearwater, Florida Tel: 813-539-8811 Fax: 813-539-7552 Alabama, Birmingham Nash U.S. 205-991-0488, Fax 205-991-5664 Michigan, Detroit Nash U.S. 810-851-3203, Fax 810-851-3561 North Carolina, Charlotte Nash U.S. 813-539-8811, Fax 813-539-7552 Pennsylvania, Scranton Nash U.S. 717-836-9924, Fax 717-836-9925 Texas, Houston Nash U.S. 713-358-3561, Fax 713-358-3571 Wisconsin, Amherst Nash U.S. 715-824-5001, Fax 715-824-5003
U.S. POWER DIVISION SALES Division Headquarters Elizabeth, Pennsylvania Tel: 412-384-3610 Fax: 412-384-4880 Connecticut, Trumbull Nash U.S. 203-459-3639, Fax 203-459-3988 Missouri, Lee’s Summit Nash U.S. 816-478-4520, Fax 816-478-4633 California, Los Angeles Nash U.S. 714-573-4949, Fax 714-573-1291 U.S. REPRESENTATIVES Arkansas, Little Rock Woodbury-Beach Company 501-663-9421, Fax 501-666-5603 Colorado, Englewood J.F. Ronco and Associates 303-796-7781, Fax 303-796-7783 Florida, Dunedin Monarch Engineered Systems, Inc. 813-781-1818, Fax 813-781-1618 Georgia, Atlanta E.W. Klein & Company 404-256-9200, Fax 404-256-3471 Hawaii, Kailua, Oahu CBC Inc. 808-263-8838, Fax 808-261-4778 Illinois, Decatur BRI, Inc. 217-864-3402, Fax 217-864-4036 Kentucky, Calvert City BRI, Inc. 502-395-4942, Fax 502-395-4943 Louisiana, New Orleans E.L.I. Inc. 504-739-2470, Fax 504-739-2484 Massachusetts, Boston Quantum Engineering Co. 617-740-8008, Fax 617-740-8228 Minnesota, Minneapolis Edelmann & Associates Inc. 612-559-7867, Fax 612-559-9403 Missouri, St. Louis BRI, Inc. 314-227-2535, Fax 314-227-2151 Oklahoma, Tulsa Myers-Aubrey Company 918-622-3500, Fax 918-628-0349 Oregon, Portland Courtney & Nye Inc. 503-693-1221, Fax 503-640-8424 Pennsylvania, Philadelphia The Sherman Engineering Co. 215-340-5300, Fax 215-340-5305 Tennessee, Memphis T.J. O’Brien Engineering Co. 901-274-9011, Fax 901-725-0871
Bulletin No. 950-A 2/97 2/9 7 Nash Nas h U.S., U.S., A divis division ion of of THE THE NASH NASH ENGINE ENGINEERI ERING NG COMP COMPANY, Trum Trumbul bull, l, CT 06611 06611-13 -1330 30
Utah, Salt Lake City C. H. Spencer & Company 801-975-0300, Fax 801-972-5216 Virginia, Richmond The Hawkins-Hamilton Company 804-323-0553, Fax 804-323-4185 SALES & SERVICE - CANADA Alberta, Calgary General Equipment Ltd. 403-252-9941, Fax 403-259-6975 Alberta, Edmonton General Equipment Ltd. 403-423-4488, Fax 403-423-4491 British Columbia, Vancouver General Equipment Ltd. 604-876-8881, Fax 604-876-1048 Manitoba, Winnepeg General Equipment Ltd. 204-453-4745, Fax 204-453-4778 Ontario, Toronto (Mississauga) S.A. McLernon Inc. 905-678-2825, Fax 905-678-6133 Quebec, Montreal S.A. McLernon Inc. 514-381-7291, Fax 514-381-2339 Saskatchewan, Saskatoon General Equipment Ltd. 306-244-2440, Fax 306-244-2770 SALES & SERVICE - MEXICO Representaciones y Procesos Ind. Tel: (52) 5 543-5492 Fax: (52) 5 523-5372 U.S. SERVICE CENTERS Alabama, Birmingham Nash U.S. 205-951-2721, Fax 205-951-2724 Illinois, Chicago Nash U.S. 630-241-7300, Fax 630-241-7313 Missouri, St. Louis Nash U.S. 314-298-8383, Fax 314-298-1818 New York, Albany Nash U.S. 518-862-0094, Fax 518-862-0097 Ohio, Cleveland Nash U.S. 216-871-9505, Fax 216-871-9508 Texas, Houston Nash U.S. 713-821-9514, Fax 713-821-9012 Washington, Vancouver Nash U.S. 360-694-9557, Fax 360-694-9574 U.S. PARTS ORDERS St. Louis, Missouri 1-800-770-6274
