INTERACTIVE SCHEMATIC

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EC-C3EC-C2 E-C60

EC-C1

E-C61

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Hydraulic System432F Backhoe Loader

SEJ1-UPLNR1-UP

©2013 Caterpillar, All Rights Reserved Printed in U.S.A.

UENR3239-02January 2013

COMPONENT LOCATION

Valve Gp - Coupler (Hoe) 358-2091 50 A-3Valve Gp - Coupler (Ldr) 359-7228 24 A-8Valve Gp - Hmu 341-7654 6 C-6Valve Gp - Hose Burst Check (Boom) 347-1128 40 F-6Valve Gp - Hose Burst Check (Lift) 262-7081 42 B-8Valve Gp - Hose Burst Check (Stick) 347-1129 41 F-4Valve Gp - Hose Burst Check (Tilt) 262-7079 43 B-8Valve Gp - Loader (Pl/it) 359-7211 27 C-7Valve Gp - Pattern Changing 300-4491 29 D-6Valve Gp - Powered Sideshift (Not Shown) 351-1637 44 B-2Valve Gp - Ride Cntrl (Opt) 245-8780 19 C-8

Valve Gp - Stab Check 308-3437 31F-3F-6

Valve Gp - Swing Cushion 320-7812 30 F-5

Valve Gp - Pilot (Hoe) 359-7227 32F-2F-8

Valve Gp - Pilot (Ldr) 382-4996 33 D-7

Valve Gp - Pilot (Stab) STD: 359-7246

34 E-8W/SWITCH: 359-7247 DTNT and SWITCH: 359-7248

Description PartNumber

MachineLocation

SchematicLocation

Accumulator Gp - Pilot 226-0420 18 C-5Accumulator Gp - Ride Cntrl (Opt) 382-8033 20 C-8Cooler Gp - Hydraulic 337-9751 4 B-4

Cylinder Gp - Boom 432F (14FT): 320-6520

13 F-6432F (16FT): 320-6522

Cylinder Gp - Bucket 320-5937 16 F-4Cylinder Gp - Coupler (Hoe) 361-1139 51 B-3Cylinder Gp - E-stick (Opt) 320-5935 17 F-3Cylinder Gp - Front Steer 217-5097 7 B-6

Cylinder Gp - Lift LH: 358-5034

8 B-8RH: 358-5035

Cylinder Gp - Mp Bucket (Opt) 185-1839 11 A-8Cylinder Gp - Powered Sideshift (Not Shown) 347-2223 45 C-3, F-1

Cylinder Gp - Stabilizer 320-5938 12F-6F-3

Cylinder Gp - Stick 432F (14FT): 320-6521

14 F-4432F (16FT): 320-6523

Cylinder Gp - Swing LH: 381-8055

15 F-5RH: 381-8054

Cylinder Gp - Tilt (Pl/it) 358-5045 10 B-8Cylinder Gp - Tilt (St) N/A NOT SHOWN NOT SHOWN Cylinder Gp - Coupler (Ldr) 178-3713 25 A-8Filter Gp - Hydraulic 359-7232 5 B-3Manifold Gp - Pilot (Basic +4) 359-7224 35 D-4Pump Gp - Implement 307-3069 1 B-4Sensor Gp - Pump Discharge Pres 344-7391 36 C-5Sensor Gp - Ride Cntrl (Opt) 344-7391 21 C-8Sensor Gp - Temp (Opt) 264-4297 22 C-4Switch Gp - Diff Pres (Opt) 134-0404 23 C-4Tank Gp - Filter / Breather / Sight Gage 351-5888 3 A-5Tank Gp - Hydraulic 358-9301 2 A-5Valve Gp - 8th Auxiliary 319-2155 46 E-1Valve Gp - 8th Auxiliary Pilot 373-7028 47 D-1Valve Gp - 9th Auxiliary 319-2158 48 D-2Valve Gp - 9th Auxiliary Pilot 373-7029 49 C-1Valve Gp - All Wheel Steer (Not Shown) N/A 39 A-6Valve Gp - Backhoe 359-7216 28 F-7Valve Gp - Boosted Brake 220-8226 37 D-3

= Graphic not avalible at time of publication.(NOT SHOWN)

TAP LOCATION

Tap Number Description Schematic Location

T1 PUMP DISCHARGE PRESSURE C-5T2 RIGHT REAR SERVICE BRAKE (See Volume 3) C-4T3 REAR PARK BRAKES (See Volume 3) D-5

FLUID POWER SYMBOLS

ONE POSITION TWO POSITION THREE POSITION

VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

LINES CROSSING LINES JOINING

TWO-WAY THREE-WAY FOUR-WAY

SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION(FIXED)

2-SECTION PUMP

MAIN AUX.

SPRING(ADJUSTABLE)

VARIABILITY LINE RESTRICTION(VARIABLE)

LINE RESTRICTIONVARIABLE and PRESSURE

COMPENSATED

PRESSURECOMPENSATION

PUMP: VARIABLE andPRESSURE COMPENSATED

ENERGY TRIANGLESHYDRAULIC PNEUMATIC

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONERPUMP or MOTOR

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROL SYMBOLSRELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOIDor MANUAL

SOLENOIDand PILOT

SOLENOID and PILOT or MANUAL

COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

HYDRAULIC AND PNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASICSYMBOL

SPRINGLOADED

CHECK VALVES

TWOPOSITION

INFINITEPOSITIONING

FLOW IN ONEDIRECTION

FLOW ALLOWED INEITHER DIRECTION

THREEPOSITION

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P TSHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOTCONTROLLED

ELECTRICAL SYMBOLSHydraulic Symbols (Electrical)

325-AG135 PK-14

Circuit IdentificationNumber

Wire Color Wire Gauge

Harness identification codeThis example indicateswire 135 in harness "AG".

325-PK-14

Wire Gauge

Wire Color

Circuit Number Identification

Wire Number Identification Codes

Current Standard

Previous Standard

Electrical Schematic Example Hydraulic Schematic Example

325-PK

Wire ColorCircuit Number Identification

B A

Wire

Wire

(EXAMPLE VALVE)

Current Standard

Transducer(Fluid)

Transducer(Gas / Air)

G

Generator

Electrical WirePressure Switch

MElectric Motor

Pressure Switch (Adjustable)

Temperature Switch

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

T

F8

E8

D8

C8

B8

A8

F7

E7

D7

C7

B7

A7

F6

E6

D6

C6

B6

A6

F5

E5

D5

C5

B5

A5

F4

E4

D4

C4

B4

A4

F3

E3

D3

C3

B3

A3

F2

E2

D2

C2

B2

A2

F1

E1

D1

C1

B1

A1Components are shown installed on a fully operable machine with the key and engine off, transmission shifterin neutral and with parking brake set.Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.

SCHEMATIC PART NUMBER: 362-9207, CHANGE: 01, VERSION: -MEDIA NUMBER: UENR3239-02THIS SCHEMATIC IS FOR THE 432F BACKHOE LOADER HYDRAULIC SYSTEM

12345678

A

B

C

D

E

F

12345678

A

B

C

D

E

F

LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing Pressure

Pressure Line

Attachment

Air Line

CALLOUTS

Taps (Pressure, Sampling, Sensor - by letter)YY

DRAIN / RETURN LINE

HYDRAULIC CIRCUIT COLOR DESCRIPTIONSIMPLEMENT AND STEERING PUMP CIRCUIT

SWING CYLINDER CIRCUIT

STEERING CYLINDER CIRCUIT

PILOT OIL CIRCUIT

BUCKET CYLINDER CIRCUIT

STICK CYLINDER CIRCUIT

LOAD SENSE CIRCUITSUPPLY LINE

BACKHOE VALVE AUX CIRCUITE-STICK CYLINDER CIRCUIT

BOOM CYLINDER CIRCUITSTABILIZER CYLINDER CIRCUIT

BOOSTED BRAKE OIL CIRCUIT

LIFT CYLINDER CIRCUITTILT CYLINDER CIRCUITLOADER VALVE CIRCUIT

POWER SIDE-SHIFT CYLINDER CIRCUITSIDE-SHIFT LOCK CYLINDER CIRCUIT

COUPLER CIRCUIT (HOE)

T2T1

T3

D

DLS

LIFT

TILT

AUX

FRONT STEER CYL.

ACC

R

T

PS

H

RH STAB BOOM SWING BUCKET STICK LH STAB E-STICK

A4 B4B3 A6 B6A1 B1

LB

LA

TA

TB

LAB

LAA

RS2

RS1

BA

BB R4

R2

SB

SA

LS1

LS2 EA

EB

J1

J2 T2 T3 J3

T1

P ACC DIAG

OPERATOR LEFT JOYSTICK

OPERATORLEFT

OPERATORRIGHT

STABILIZER JOYSTICK

TILTLIFT

LOADER JOYSTICK

P

LAAEB

LABEA

TBTALALB

LS2LS1RS2RS1

L1L3L2L4

R2R4R3R1

SBBABB SA

L4R1 R3 L2

A1

B1

A2

B2

A3

B3

A3

BRK

LEFTBRAKEPEDAL

TO REAR AXLELEFT WHEEL

BRAKE

TO REAR AXLERIGHT WHEEL

BRAKE

SULIFT

TILT

AUX

A2 B2 A5 B5 A7 B7

PilBL

C2

V2 PilBL

C2

V2

SIDESHIFTLOCK

F1

F2 R2

R1

REAR STEER CYLINDER

FRONT STEER CYL.

AWS VALVE 444F ONLY

HMU-RHMU-L

R L

B A

NOTE B

NOTE B

P8

LS8

T8

T7P7

T6

P6

B A

L1

L3

OPERATOR RIGHT JOYSTICK

RIGHTBRAKEPEDAL

(3) TANK GPFILTER / BREATHER / SIGHT GAGE

351-5888

(2) TANK GPHYDRAULIC

358-9301

(4) COOLER GPHYDRAULIC337-9751

(1) PUMP GPIMPLEMENT307-3069

(7) CYLINDER GPFRONT STEER214-5079

(39) VALVE GPAWS (444F ONLY) 340-7028

(5) FILTER GPHYDRAULIC

359-7232

(23) SWITCH GPDIFF PRESS(OPTIONAL)

134-0404

(22) SENSOR GPTEMP (OPTIONAL)

264-4297

(37) VALVE GPBOOSTED BRAKE

220-8226

(35) MANIFOLD GPPILOT (BASIC +4)359-7224

(18) ACCUMULATOR GPPILOT

226-0420

(36) SENSOR GPPUMP DISCHARGE

344-7391

(6) VALVE GPHMU (LOAD SENSE RELIEF)

341-7654

(29) VALVE GPPATTERN CHANGE300-4491

(33) VALVE GPPILOT382-4996

(27) VALVE GPLOADER (PL/IT)

359-7211

(21) SENSOR GPRIDE CONTROL (OPT)

344-7391

(20) ACCUMULATOR GPOPTIONAL382-8033

(19) VALVE GPRIDE CONTROL (OPT)

245-8780

(8) CYLINDER GPLIFT (LH)358-5034

(8) CYLINDER GPLIFT (RH)358-5035

(10) CYLINDER GPTILT358-5045370-7083

432F:444F:

(11) CYLINDER GPMP BUCKET (OPT)

185-1839

(25) CYLINDER GPCOUPLER (LDR)

178-3713

(24) VALVE GPCOUPLER (LDR)

359-7228

(32) VALVE GPPILOT (HOE)359-7227

(17) CYLINDER GPE STICK (OPT)320-5935

(12) CYLINDER GPSTAB320-5938

(31) VALVE GPCHECK (STAB)308-3437

(14) CYLINDER GPSTICK

320-6521432F(14ft):320-6523432f (16ft), 444F:

(15) CYLINDER GPSWING

381-8054RH:LH: 381-8055 (16) CYLINDER GP

BUCKET320-5937

(41) VALVE GPHOSE BURST (STICK)

347-1129

(30) VALVE GPCUSHION320-7812

(12) CYLINDER GPSTAB

320-5938

(13) CYLINDER GPBOOM

320-6520432F(14ft):320-6522432f (16ft), 444F:

(31) VALVE GPCHECK (STAB)

308-3437

(40) VALVE GPHOSE BURST (BOOM)

347-1128

(28) VALVE GPBACKHOE

359-7216

(43) VALVE GPHOSE BURST(TILT)

262-7079

(42) VALVE GPHOSE BURST(LIFT)

262-7081

(32) VALVE GPPILOT (HOE)

359-7227

(34) VALVE GPPILOT (STAB)

359-7247359-7248

W / SWITCH:DTNT and SWITCH:

9TH AUX

A2B2

PSS

A1B1

8TH AUX

A2B2

T2

LS2P2

LST M P

8TH AUXILIARY & POWERED SIDESHIFT

P8LS8T8

T6

P6

C2C1

P

TT6

P6

T8

P8

LSC1 C2

P

T

POWERED SIDESHIFT

LS8

BACKHOE COUPLER

T7

P7

9TH AUXILIARY

(47) VALVE GP8TH AUX PILOT373-7028

(48) VALVE GP9TH AUX373-7028

(46) VALVE GP8TH AUX319-2155

(45) CYLINDER GPPOWER SIDE SHIFT

347-2223

(49) VALVE GP9TH AUX PILOT373-7029

(45) CYLINDER GPPOWER SIDE SHIFT347-2223

(44) VALVE GPPOWER SIDE SHIFT351-1637

(50) VALVE GPCOUPLER (HOE)358-2091

(51) CYLINDER GPCOUPLER (HOE)

347-2223

ADDED AS AN ADDITONAL SLICE TO8TH and POWERED SIDESHIFT VALVE

BOTTOM VIEW

T3 T2

51

503530

29 25

24

18

LEFT SIDE VIEW

43

43

42

42

37

20

2020

19

11

11

5

RIGHT SIDE VIEW

T1

4948

47

46

44

36

34

33

32

31

31

28

27

12

12

10

10

8

86

43

21

STICK AND BOOM

41

40

16

15

14

13