426F2 Diagrama Electrico.pdf

UENR8014-01 January 2017

16

17

FLUID POWER SYMBOLS

2

BASICCOMPONENTSYMBOLS MAIN

15

Component Locations Schematic Location C-3

Machine Location 1

Cooler Gp - Hydraulic

Description  Accumulator Gp - Pilot

19 14 13

A -6

2

Cylinder Gp - Boom

F-6

3

Cylinder Gp - Bucket

F-3

4

Cylinder Gp - Lift

C-6

5

V A R AI BI L I T Y

SPRING (ADJUSTABLE)

LN I ER E S T RC I T I O N (VARIABLE)

6

P T

Cylinder Gp - Steering

D-7

9

NORMALPOSITION

F-2

D-8

15 16

Tank Gp - Hydraulic Valve Gp - Backhoe

A-5 E-1

17 18

Valve Gp - Boosted Brake

C-2

19

Valve Gp - Loader (PL/I T) V avl e G p- M an iof l d( S er vci e Br a ke C on t o r l)

 PUMP (VARIABLE&PRESSURE   COMPENSATED)

LINERESTRICTION  ATTACHMEN T (VARIABLE&PRESSURE COMPENSATED)

VALVE PORTS

TWO -WAY

TH R E E- W AY

FO U R -WAY

 AB P T SHIF TEDPOS ITIO N

BASIC SYMBOL

I N FN I ITEPO S I TO IN

SPRING LOADED

S H UT L T E

P LIO T CONTROLLED

FLUIDSTORAGERESERVOIRS

12 13 14

A-5

 AB

AUX

PUMP (2-SECTION)

CHECKVALVES

10

A-7 B-3

Tank Gp -Filt er /Breather

HYDRAULIC PNEUMATIC ENERGYTRIANGLES

T HR E E P O STI I O N

11

F ilter Gp - H ydraulic Pump Gp - Implement Pump Gp - Metering (H MU )

PRESSURE COMPENSATION

LIN ERES T RI C ITO N (FIXED)

VALVES

T W OP O S I TOI N

7 8

F-5

RES T RI C ITO N

CONTROLVALVES

C-5

C-6

CON TRO L V AV LES

VALVE ENVELOPES

ONEP O STI I O N

F-4 F-4

Cylinder Gp - Stick

CC

SPR ING

Cylinder Gp -Stabilizer L( H) Cylinder Gp -Stabilizer R (H )

Cylinder Gp - Swing

1

FLUIDCONDITIO NER

Cylinder Gp -MP Bucket (OPT)

C ylinder Gp - Tilt

21

PUMPORMOTOR

C-7

20

C-3

21

DD BB

V E N T E D

426F2 Backhoe Loader  Hydraulic System

P R E S S UR ZI E D

R E T U R NA BO V E FL U I DL E V EL

R E T U R NB E L OW FL U I DL E V EL

MEASUREMENT

PR E S S UR E

ROTATING SHAFTS

TE M P E RAT U RE

FL O W

UN I DI RE CT O I NA L

BD IR I EC T I ON AL

COMBINATIONCONTROLS

DJ41-UP EJ21-UP EJ41-UP SOLENOID

SOLENOID ORMANUAL

SOLENOID &PILOT

SOLENOID& PILOTORMANUAL

SERVO

THERMAL

DETENT

MANUALCONTROLSYMBOLS

Tap Locations Pressure, Sampling, and Sensor  Tap Number   AA BB CC

20

DD

Description FILTERPREASSURE P UM PD PD S I CH AR GE P RE SS UR E LOAD SENSE PRESSURE PI LOT PRESSURE

Schematic Location A-7 B 4B-3

PUSH - PULL LEVER

MANUALSHUTOFF

E XT ER NA L R E TU RN

 AA

GENERAL M ANUAL

PUSH BUTTON

PEDAL

PILOTCONTROLSYMBOLS

RELEASEDPRESSURE

SPRING

REMOTESUPPLYPRESSURE

C-3 IN T ER NA L R E TU R N

ACCUMULATORS

SPR I N GL O A DED

GASC HAR GED

LIN ESCR OSS ING

HYDRAULICPUMPS FIXED DISPLACEMENT

SIMPLIFIED

FIXED DISPLACEMENT

INTERNAL SUPPLYPRESSURE

HYDRAULIC&PNEUMATICCYLINDERS

LIN ESJO I NNI G

SINGLEACTING

HYDRAULICMOTORS

VARIABLEDISPLACEMEN T NON-COMPENSATED

UNIDIRECTIONAL

18

COMPLETE

CROSSING&JOININGLINES

DOUBLEACTING

INTERNALPASSAGEWAYS

VARIABLEDISPLACEMENT NON-COMPENSATED

INFINITE POSITIONING

3POSITION

2POSITION

UNIDIRECTIONAL

BIDIRECTIONAL

FLOWINONE DIRECTION

BIDIRECTIONAL

PARALLEL FLOW

CROSS FLOW

FLOW IN EITHER   DIRECTION

CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow”, and the POWEREDGE trade dressas well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.

©2017 Caterpillar   AllRights Reserved

UNDER CAB VIEW ELECTRICAL SYMBOLS TABLE HYDRAULICSYMBOLS(ELECTRICAL)

G

M

10 TRANSDUCER (FLUID)

TRANSDUCER (GAS/ AIR)

GENERATOR

ELECTRICMOTOR

PRESSURE SWITCH

PRESSURESWITCH (ADJUSTABLE)

TEMPERATURE SWITCH

ELECTRICAL WIRE

4

WIRENUMBERIDENTIFICATIONCODES

5 12

E LE CT RI CA L SC HE MA TI C EX AM PL E

H YD RA UL IC S CH EM AT IC E XA MP LE

CURRENT STANDARD

CURRENT STANDARD

HARNESSIDENTIFICATIONCODE THISEXAMPLE INDICATESWIRE135 INHARNESS“AG” WIRE CIRCUITNUMBER IDENTIFICATION

325-AG135 PK-14

CIRCUITNUMBER IDENTIFICATION

WIRE COLOR

WIRECOLOR

WIREGAUGE

325-PK

PREVIOUSSTANDARD WIRE

3

WIRECOLOR

B

325-PK-14

CIRCUITNUMBER IDENTIFICATION

7 11 9 8

MACHINE COMPONENT LOCATIONS

6

WIREGAUGE

 A

(EXAMPLEVALVE)

   )   s   e    h   c   n    i    8    2   x   s   e    h   c   n    i    9    3   :   s   n   o    i   s   n   e   m    i    D    (

   1    0      4    1    0    8    R    N    E  e ,   g    U  a

   P    0    3

8

7

6

5

4

3

2

1

SLIDE FRAME CLAMP (3)CYLINDERGP BOOM 478-1347

F

BOOM

(8)CYLINDERGP STABILIZER 478-1348

 A1

B1

STAB

SWING

(11) CYLINDER GP SWING 478-1349

B2

 A2

B3

(7)CYLINDERGP STABILIZER 478-1348

STAB

B4

 A3

BUCKET

(10)CYLINDERGP STICK 478-1346

(4)CYLINDERGP BUCKET 478-1345

A4

B5

 A5

HAMMER

STICK

F

B6

B7

 A6

 A7

(18)VALVEGP BACKHOE 6 BANK: 456-1853 7 BANK: 479-0623

C

P

LS

b

b

b

b

b

b

E

E

(15)PUMPGP METERING (HMU) 449-1647

L

R

a

a

a (9)CYLINDERGP STEERING 4WD: 214-5097 2WD: 478-1352

a

a

a

T3

T B

T

 A

T

T

B

 A

T

T

B

T

 A

T

B

 A

T

STEERING D

D

(19)VALVEGP BOOSTEDBRAKE 220-8226

(1)ACCUMULATORGP PILOT 149-0686

(5)CYLINDERGP LIFT 478-1350

P

T

LIFT

(12)CYLINDERGP TILT 478-1351

 AUXILIARY (OPTIONAL ONLY)

TILT

LEFT BRAKE PEDAL

(6)CYLINDERGP MPBUCKET(OPT) 480-7402

TO REARAXLE LEFTWHEELBRAKE

LS RIGHT BRAKE PEDAL

TO REARAXLE RIGHTWHEELBRAKE

C

C M

   )   s   e    h   c   n    i    8    2   x   s   e    h   c   n    i    9    3   :   s   n   o    i   s   n   e   m    i    D    (

D

B1

B2

A1

B3

A2

 A3

(21)VALVEGP MANIFOLD (SERVICEBRAKECONTROL) 373-6966

DLS

   1    0      4    1    0    8    R    N    E  e ,    U  g   a

   P    0    3

LS

b

(20)VALVEGP LOADER(PL/IT) 2 BANK: 456-1851 3 BANK: 456-1852

b

DD

b

P (14) PUMPGP IMPLEMENT 307-3063

a

a

a

LS

B

T T

CC T

B

T

LIFT

B

 A

T

T

B

X1 B

TILT

BB LINEPATTERNS Pressure Line

MB

B

HYDRAULICCIRCUIT COLORDESCRIPTIONS

Pilot / Load Sensing Pressure Drain / Return Lines  Air Line ComponentGroup

(13)FILTERGP HYDRAULIC 361-6768

CALLOUTS Taps (Pressure,Sampling,Sensor-byletter)

YY DL

 A

(2)COOLERGP HYDRAULIC 491-7055

 AA

Callout Number 

(16) TANKGP FILTER/BREATHER 473-9925

(17)TANKGP HYDRAULIC 510-7168

DL

(MachineLocationfrom Component LocationsTable)

S

MS

Connectors(Byletter)

D

(52) VALVEGP- CONTROL 138-1234 PartNumber 

Component Name

PILOTPUMPOUTPUT MAINPUMPOUTPUT SLIDEFRAMECLAMPCIRCUIT BUCKETCYLINDERCIRCUIT LOADSENSECIRCUIT STEERINGCIRCUIT STICKCYLINDERCIRCUIT SUPPLYLINE HAMMERCIRCUIT BOOMCYLINDERCIRCUIT  AUXCIRCUIT SWINGCYLINDERCIRCUIT DRAIN/ RETURNLINE STABILIZERCYLINDERCIRCUIT LIFTCYLINDERCIRCUIT TILTCYLINDERCIRCUIT BOOSTEDBRAKEOILCIRCUIT

L2

L1

THISSCHEMATICISFORTHE426F2 BACKHOELOADERHYDRAULICSYSTEM MEDIANUMBER: UENR8014-01 SCHEMATICPART NUMBER: 485-7320, CHANGE: 01, VERSION: D

HAMMER RETURN

Components are shown installed on a fully operable machine with the key and engine off, transmission shifter  in neutraland with parking brake set. Refer to the appropriate Service Manualfor Troubleshooting, Specif ications and Systems Operations. Refer to the Parts Manualusing a specific serialnumber prefix in SIS before ordering parts from this schematic.

8

7

6

5

4

3

2

1

 A