Sistema Hidraulico 950H

8/10/2019 Sistema Hidraulico 950H

1/13

INTERACTIVE SCHEMATIC

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Cover Page

Information

Schematic

Machine Views

Component Table

Tap Table

Fluid Power Symbols

Electrical Symbols

Front Frame

Rear Frame

Tap Views

Features

Options

Bookmarks X

EC-C3

EC-C2 E-C60

EC-C1

E-C61

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2/13

Hydraulic System

950H, 962H, and IT62H Wheel Loader

2012 Caterpillar, All Rights Reserved Printed in U.S.A

RENR8879-0November 201

950H:

N1A1-4396

JAD1-409

M1G1-2110J5J1-UP

K5K1-2760

962H:

N4A1-2115

M3G1-678

J6J1-UPK6K1-516

MAL1-122

IT62H:

M5G1-467


3/13

COMPONENT LOCATION

6

0432-221

163-0324

146-7571

0004-241

8J-1553

5368-421

163-0324

5777-111

0971-741

5786-J8

3882-451

241-9299

254-4108

0224-242

247-0497

245-7491

245-7487

2724-242

1724-242

112-1817

245-2975

6415-452

2516-642

244-1426

244-1031

242-1307

249-2334

220-0814

237-2742

141-2597

275-8544

261-4171

261-3682

261-4172

261-3683

274-8055

245-2973

6415-452

242-1307

193-1448

105-6117

214-4863

215-3687

213-8773

129-8090

106-1774

174-4312

175-3244

180-8585

237-0946

7181-211

PartNumber

230-417

HMU STEERING CIRCUIT

COMMAND CONTROL STEERING

MAIN SCHEMATIC

BRAKE SYSTEM

Description

Hand Metering Unit

ecifirO-rotcennoC

Cylinder Gp - Steer

Valve Gp - Neutralizer

reetS-pGevlaV

Valve Gp - Neutralizer

reetS-pGevlaV

Cylinder Gp - Steer

kcehC-pGevlaV

toliP-pGevlaV

elttuhS-pGevlaV

pGneercS

Pump Gp - Steering

Pump Gp - Implement

tliT-rednilyC

Cylinder - Tilt (Mid Lift)

Cylinder - Tilt (High Lift)

Cylinder - Tilt (Logger)

)HL(tfiL-rednilyC

)HR(tfiL-rednilyC

Valve Gp - Manual Lowering

Accumulator - Pilot Oil

naF-pGpmuP

naF-pGrotoM

Valve Gp - Cooler Bypass

Filter Gp - Return Oil

Manifold Gp - Fan & Brake Charge

Filter Gp - Case Drain

Valve Gp - Breaker Relief

Tank Gp - Hydraulic Oil

Valve Gp - Secondary Steer Diverter

Pump Gp - Secondary Steer

Valve Gp - Control

(2 Function Standard)

Valve Gp - Control

(2 Function W/RC)

Valve Gp - Control

(3 Function)

Valve Gp - Control

(2 Function W/RC)

Valve Gp - Control (Snow Removal)

(3 Function W/RC)

Accumulator - Ride Control (RC)

naF-pGpmuP

Manifold Gp - Fan & Brake Charge

Control Gp - Foot Brake

Switch As - Foot Brake Limit

Sensor Gp - Foot Brake

Valve Gp - Foot Brake

Accumulator - Service Brake

Actuator As - Parking Brake

Valve Gp - Parking Brake

Switch As - Parking Brake Pressure

Switch As - Brake Pressure

Valve Gp - Quick Coupler

Cylinder Gp - Quick Coupler

launaM-pGevlaV

Machine

Locations

1

2

3

4

5

6

7

8

9

10

11

12

13

14

20

21

23

24

25

26

27

28

30

31

32

33

34

35

41

25

30

45

46

47

48

49

50

51

52

53

36

15

54

55

56

A-4

4-B,3-B

B-1

B-3, B-4

2-B

D-3

1-D

E-1

3-D

4-D

3-C

2-E

A-6

B-7

8-F

F-8

F-8

F-8

7-F

7-F

F-9

F-5

8-B

8-B

B-9

B-9

C-8

A-8

A-8

A-8

B-5

A-5

F-8

F-6

2-F

F-2

F-3

F-3

F-3

F-3

F-2

F-1

F-2

F-1

F-3

C-9

C-9

9-C

SchematicLocation

F-8

F-8

F-8

F-8


4/13

TAP LOCATION

8-BAA

E-9CC E-9

DD B-7

6-BEE

FF A-4, C-4

5-EGG

8-BHHKK D-2

LL D-2

MM D-3

NN D-3

3-FPP

4-FQQ

4-FRR

8-FXX

YY 8-F

9-B

TapNumber

Description Schemati

Location

erusserPegrahcsiDpmuPnaF

Implement Pump Charge Pressure

Implement Pump Load Sense Pressure

erusserPpmuPreetS

Steer Pump Load Sense Pressure

erusserPylppuStoliP

erusserPesneSdaoLpmuPnaFCommand Control Right Steer Pilot Pressure

Command Control Left Steer Pilot Pressure

Command Control Steering Neutral Pilot Press

Command Control Steering Supply Pressure

erusserPekarBecivreS

erusserPekarBecivreStnorF

erusserPekarBecivreSraeR

erusserPdnEdoRrednilyCtliT

Tilt Cylinder H erusserPdnEdae

troPgnilpmaSliOciluardyHSOS


5/13

ELECTRICAL SYMBOLS

Hydraulic 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


6/13

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

PRESSURE

COMPENSATION

PUMP: VARIABLE and

PRESSURE COMPENSATED

ENERGY TRIANGLES

HYDRAULIC PNEUMATIC

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS

FIXED

DISPLACEMENT

VARIABLE DISPLACEMENT

NON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONERPUMP or MOTOR

FIXED

DISPLACEMENT

VARIABLE DISPLACEMENT

NON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROL SYMBOLSRELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED COMPLETE INTERNAL

SUPPLY PRESSU

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOIDor MANUAL

SOLENOIDand PILOT

SOLENOID andPILOT or MANUAL

COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

HYDRAULIC AND PNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASIC

SYMBOL

SPRING

LOADED

CHECK VALVES

TWO

POSITION

INFINITE

POSITIONING

FLOW IN ONEDIRECTION

FLOW ALLEITHER DIR

THREE

POSITION

CROSSFLOW

PARALLEL

FLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P T

SHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOT

CONTROLLE


7/13

Components are shown installed on a fully operable machine with the key and engine off, transmission shifterIn neutraland with parking brake set.

Refer to the appropriate service manualfor troubleshooting, specifi cations and systems operations.

SCHEMATICPART NUMBER241-0475, CHANGE09, VERSION-MEDIANUMBER RENR8879-05THIS SCHEMATICIS FORTHE HYDRAUL

BRAKESYSTEM PART NUMBER244-1398, CHANGE00, VERSION-

950H, 962H, ANDIT62H WHEEL LOADER

2345678 2345678 119

2345678 2345678 19

A

B

C

D

E

F

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 - ByLetter)YY

DRAIN / RETURN LINE

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

IMPLEMENT PUMP OUTPUT

PRIMARY STEERING PUMP CIRCUIT

STEERING CIRCUIT

IMPLEMENT PILOT SUPPLY OIL

AUXILIARY CIRCUIT

IMPLEMENT PUMP LOAD SENSING CIRCUIT

SUPPLY LINE

TILT CYLINDER CIRCUIT

LIFT CYLINDER CIRCUIT

SECONDARY STEERING CIRCUIT

BRAKE CHARGE VALVE AND FAN CONTROL CIRCUIT

MAIN RELIEF VALVE LOAD SENSING CIRCUIT

BRAKE CONTROL CIRCUIT

EE

AA

SOS

HH

DD

FF

MMNN

LL KK

FF

GG

XX

YY

CC

RR

QQ PP

HMU STEER AND 3PC IMPLEMENT

COMMAND CONTROL STEERING ATTACHMENT

A1

A1

B1

B1

C1

C1 C1

D1

D1

D1

E1

E1

E1

CROSSOVERRELIEF

SHUTTLEVLV

DIRECTIONAL SPOOL

MAKEUPCHECK

BACKUPRELIEF

PRESSUREREDUCING

VALVE

PILOT PORT"A"

PILOT PORT"B"

REGULATEDPRESS. PORT

TO PILOT VALVE

TANKPORT

CYL PORT "A"CYL PORT "B"

LOADSENSINGPUMPPORT

PORT ALEVERFORWARDLEFT HANDLINEONBOOM(WHENVIEWEDFROM CAB)

CROSSOVERRELIEF

CYL PORT "A"

CYL PORT "B"

MAKE-UPCHECKS

DIRECTIONAL SPOOL

BACK-UPRELIEFPUMPPORT

HMUSUPPLY PORT

PILOT PORT "B"

PILOT PORT "A"

PILOT CONTROL SPOOL

TILT

RACKBACK

DUMP

RACK

BACK

HOLD

DUMP

LIFT

RAISE

LOWER/

FLOAT

RAISE

HOLD

LOWER

FLOAT

HOLD

HEADEND

PORTB

3RDFUNCTION

(ATTACHMENT)

PORTA

PORTB

LS DR

R H

LS P T

F

PS

A1 A2

TO FRONTBRAKES

TO REARBRAKES

BRAKE SYSTEM

A1A2

PS

F

LS P T

TO FANMOTOR

TOCASEDRAIN

MANIFOLD

NC

NO

CCTO TRANSMISSION

CONTROL

TO BRAKE

LIGHTS

APPLY

RELEASE

FRONT AXLE

REARAXLE

HYDRAULICTANK

Connection B1 Only For Command Control Steering

PORT BLEVERREARWARDRIGHT HANDLINEONBOOM(WHENVIEWEDFROM CAB)

QUICK COUPLER(ATTACHMENT)

(1) HAND METERINGUNIT

230-4176

(4) VALVE GPNEUTRALIZER

146-7571

(2) CONNECTORORIFICE122-2340

(5) VALVE GPSTEER142-4000

(3) CYLINDER GSTEER

230-4176

(11) VALVE GPSHUTTLE8J-6875

(9) VALVE GPCHECK111-7775

(6) VALVE GPNEUTRALIZER8J-1553

(10) VALVE GPPILOT147-1790

(12) SCREEN GP154-2883

(8) CYLINDER GPSTEER

163-0324

(7) VALVE GSTEER124-8635

(48) VALVE GPFOOTBRAKE

215-3687

(30) MANIFOLD GP

FAN AND BRAKE CHARGE242-1307

(25) PUMP GPFAN254-5146

(52) SWITCH ASPARKING BRAKE PRESSUR

174-4312

(50) ACTUATPARKING B129-8090

(51) VALVE GP

PARKING BRAKE106-1774

(49) ACCUMULATORSERVICE BRAKE

213-8773

(45) CONTROLGPFOOTBRAKE

193-1448

(46) SWITCH ASFOOTBRAKE LIMIT

105-6117

(53) SWITCH ASBRAKE PRESSURE175-3244

(47) SENSOR GP

FOOTBRAKE214-4863

(31) FILTER GPCASE DRAIN

249-2334

(32) VALVEGPBREAKER

RELIEF220-0814

(28) FILTER GPRETURN OIL

244-1031

(27) VALVE GPCOOLER BYPASS

244-1426

(34) VALVE GPSECONDARY STEER DIVERTER141-2597

(26) MOTOR GPFAN

246-6152

(54) VALVE GPQUICK COUPLER

180-8585

(56) VALVE GPMANUAL112-1817

(55) CYLINDER GP

QUICK COUPLER237-0946

(30) MANIFOLD GP

FAN AND BRAKECHARGE242-1307

(25) PUMP GP

FAN254-5146

(36) VALVE GPCONTROL

2 FUNC STD 261-41712 FUNC W/RC261-3682

2 FUNC W/RC261-36833 FUNC STD261-4172

3 FUNC W/RC274-8055

(23) VALVE GPMANUALLOWERING112-1817

(15) CYLINDER GP

TILT242-4220

TILT (MID LIFT)247-0497

TILT (HIGH LIFT)245-7491

TILT (LOGGER)245-7487

(21) CYLINDERLIFT (RH)242-4271

(41) ACCUMULATORRIDE CONTROL (RC)245-2973

(20) CYLINDERLIFT (LH)242-4272

(24) ACCUMULATORPILOT OIL245-2975

(14) PUMP GPIMPLEMENT

254-4108

(13) PUMP GPSTEERING241-9299 (35) PUMP GP

SECONDARY STEER275-8544

(33) TANK GPHYDRAULIC OIL237-2742

RELIEF272-7003256-2866

RELIEF272-7003

RELIEF247-8632

RELIEF254-5789

RELIEF282-4349

RELIEF4T-7581

RELIEF272-2334

RELIEF272-2334


8/13


9/13

FAN AND BRAKE PUMP

FAN AND BRAKE HYDRAULIC SYSTEM

The fan and brake pump (25) is located on the front gear train of the engine, on the right side of thmachine. The fan and brake pump provides oil flow for the electronic demand fan systemand the

brake hydraulic system. The outlet pressure tap (AA) is located on the fan and brake pump.

Also located on the engine on the right side of the machine is the fan control and brake accumula

charging valve (30). The fan pump load sense pressure tap (HH) is located above the brake charg

valve.

HH

AA

30

25

VIEW ALL CALLO


10/13

HMU AND SERVICE BRAKES

The followingcomponentsare locatedunder the frontof thecab.

- Hand metering unit (1)

- Foot service brake valve (48)

- Steer pump load sense test port (FF)

- Front sercive brake test port (QQ)

- Rear service brake test port (RR)

QQ

FF

RR

48

1

VIEW ALL CALLO


11/13

IMPLEMENT CONTROL VALVE

photo shows a front view of the implement control valve (36) in the loader frame. The

wing components can be seen in this view:

t accumulator (24)

t supply pressure tap (GG)

Following components are not referenced on the Hydraulic System Schematic:

ssure differential relief valve (A)

ad end solenoid valve (ride control) (B)

nal relief valve (C)

anti-drift valve (D)

d end solenoid valve (ride control) (E)

e control balance solenoid valve (F)

t pressure reducing valve (G)

cylinder head end pressure tap (H)

cylinder head end pressure sensor for Payload Control System and Autodig (J)

raulic lockout solenoid valve (K)

This photo shows a left rear view of the implement control valve (36). The following components can

be seen in this view:

- Implement control valve supply pressure tap (GG)

The Following components are not referenced on the Hydraulic System Schematic:

- Tilt anti-drift valve (A)

- Signal relief valve (B)

- Signal duplication valve (C)

- Return to tank port (D)

- Supply port from pump (E)

- Signal line to pump (F)

- Tank line (G)

- Screen (H)

- Tilt back pilot solenoid valve (J)

- Tilt back pilot (K)

- Tilt cylinder rod end line relief (L)

- Ride control balance solenoid valve ( M)

- Rod end solenoid valve (ride control) (N)

This drawing shows a right side view of the wheel loader. The following components cin this view:

- Implement pump pressure tap (CC)

- Implement pump load Sense pressure tap (DD)

A B

F

E

D

GH

J

K

C CA B

F

E

D

G

H

J

K

L

M

N

GG

DD

CC

24

VIEW ALL CA


12/13

SERVICE CENTER

e service center is located on the right side of the machine below the cab. The Following

mponents are located in the service center:

ase drain filter (31)ydraulic oil fluid sampling valve (SOS)

ydraulic systems kidney loop filter (28)

rake system accumulators (49)

e Following components are not referenced on the Hydraulic System Schematic:

ower train oil fluid sampling valve (A)

ower train oil filter (B)

cology drain for the hydraulic tank (C)

The following remote pressure taps are located inside the panel on the frontside

service center:

- Steering pump outlet pressure (EE)- Brake system accumulator pressure (PP)

The Following components are not referenced on the Hydraulic System Schema

- Transmission reverse clutch (A)

- Transmission forward clutch (B)

- Transmission fourth speed clutch (C)

- Transmission third speed clutch (D)

- Transmission second speed clutch (E)

- Transmission first speed clutch (F)

- Torque converter inlet pressure (G)

- Transmission lubrication pressure (H)

- Transmission pump outlet pressure (J)

- Torque converter outlet pressure (K)

- Steering cylinder rod end grease fittings (L)

- Rear axle oscillation bearing grease fittings (M)

A

B

C

A B

F

E

D

G

C H J

M

L

K

SOS PPEE

49

31 28

VIEW ALL C


13/13

TILT CYLINDER LINES GROUP

VIEW A - A

RIGHT SIDE VIEW

YY

YY

XX

XX

15

15

VIEW ALL CALLO

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Sistema Hidraulico 950H