Sistema Hidraulico 950H

INTERACTIVE SCHEMATIC Bookmarks

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Information Component Table Tap Table Fluid Power Symbols Electrical Symbols

Schematic Machine Views Front Frame Rear Frame Tap Views

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E-C60 E-C61

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EC-C1

VIEW ALL CALLOUTS

When only one callout is showing on a machine view this button will make all of the callouts visible. This button is located in the top right corner of every every machin e view page. page.

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RENR8879-05  November 2012

950H, 962H, and IT62H Wheel Loader  Hydraulic System 950H:

962H:

IT62H:

N1A1-4396

N4A1-2115

M5G1-467

JAD1-409

M3G1-678

M1G1-2110

J6J1-UP

J5J1-UP

K6K1-516

K5K1-2760

MAL1-122

© 2012 Caterpillar, All Rights Reserved

Printed in U.S.A.

COMPONENT LOCATION Part Number 

Description

Schematic Location

Machine Locations

HMU STEERING CIRCUIT

Hand Metering Unit

230-4176

 A-4

1

Connector - Or if ice

122-2340

B-3, B-4

2

Cylinder Gp - Steer 

163-0324

B-1

3

Valve Gp - Neutralizer 

146-7571

B-3, B-4

4

Valve Gp - Steer 

142-4000

B-2

5

8J-1553

D-3

6

124-8635

D-1

7

COMMAND CONTROL STEERING

Valve Gp - Neutralizer  Valve Gp - Steer  Cylinder Gp - Steer 

163-0324

E-1

8

Valve Gp - Check

111-7775

D-3

9

Valve Gp - Pilot

147-1790

D-4

10

8J-6875

C-3

11

154-2883

E-2

12

Valve Gp - Shuttle Scr een Gp

MAIN SCHEMATIC

Pump Gp - Steering

241-9299

 A-6

13

Pump Gp - Implement

254-4108

B-7

14

Cylinder - Tilt

242-4220

F-8

Cylinder - Tilt (Mid Lift)

247-0497

F-8

Cylinder - Tilt (High Lift)

245-7491

F-8

Cylinder - Tilt (Logger)

245-7487

F-8

Cylinder - Lif t (LH)

242-4272

F-7

20

Cylinder - Lif t (RH)

242-4271

F-7

21

Valve Gp - Manual Lowering

112-1817

F-9

23

 Accumulator - Pilot Oil

245-2975

F-5

24

Pump Gp - Fan

254-5146

B-8

25

Motor Gp - Fan

246-6152

B -8

26

Valve Gp - Cooler Bypass

244-1426

B-9

27

Filter Gp - Return Oil

244-1031

B-9

28

15

Manifold Gp - Fan & Brake Charge

242-1307

C-8

30

Filter Gp - Case Drain

249-2334

 A-8

31

Valve Gp - Breaker Relief 

220-0814

 A-8

32

Tank Gp - Hydraulic Oil

237-2742

 A-8

33

Valve Gp - Secondary Steer Diverter 

141-2597

B-5

34

Pump Gp - Secondary Steer  Valve Gp - Control (2 Function Standard)

275-8544

 A-5

35

261-4171

F-8

Valve Gp - Control (2 Function W/RC)

261-3682

F-8

Valve Gp - Control (3 Function)

261-4172

F-8

Valve Gp - Control (2 Function W/RC)

261-3683

F-8

Valve Gp - Control (Snow Removal) (3 Function W/RC)

274-8055

F-8

 Accumulator - Ride Control (RC)

245-2973

F-6

41

Valve Gp - Quick Coupler 

180-8585

C-9

54

Cylinder Gp - Quick Coupler 

237-0946

C-9

55

112-1817

C-9

56

Valve Gp - Manual

36

BRAKE SYSTEM

Pump Gp - Fan

254-5146

F-2

25

Manifold Gp - Fan & Brake Charge

242-1307

F-2

30

Control Gp - Foot Brake

193-1448

F-3

45

Switch As - Foot Brake Limit

105-6117

F-3

46

Sensor Gp - Foot Brake

214-4863

F-3

47

Valve Gp - Foot Brake

215-3687

F-3

48

 Accumulator - Service Brake

213-8773

F-2

49

129-8090

F-1

50

Valve Gp - Parking Brake

106-1774

F-2

51

Switch As - Parking Brake Pressure

174-4312

F-1

52

Switch As - Brake Pressure

175-3244

F-3

53

 Actuator As - Parking Brake

TAP LOCATION

Tap Number 

 

Description

 

Schematic Location

 A A

Fan Pump Dischar ge Pr essur e

B-8

CC

Implement Pump Charge Pressure

E-9

DD

Implement Pump Load Sense Pressure

B-7

EE

Steer Pump Pr essur e

B-6

FF

Steer Pump Load Sense Pressure

GG

Pilot Supply Pr essur e

E-5

HH

Fan Pump Load Sense Pr essur e

B-8

KK

Command Control Right Steer Pilot Pressure

D-2

LL

Command Control Left Steer Pilot Pressure

D-2

MM

Command Control Steering Neutral Pilot Press

D-3

NN

Command Control Steering Supply Pressure

D-3

PP

Ser vice Br ake Pr essur e

F-3

QQ

Fr ont Ser vice Br ake Pr essur e

F-4

RR

Rear Ser vice Br ake Pr essur e

F-4

XX

Tilt Cylinder Rod End Pr essur e

F-8

YY

Tilt Cylinder H ead End Pr essur e

F-8

Hydr aulic Oil Sampling Por t

B-9

S OS

A-4, C-4

ELECTRICAL SYMBOLS Hydraulic Symbols (Electrical)

M

G Transducer  (Fluid)

Transducer  (Gas / Air)

Pressure Switch (Adjustable)

Pressure Switch

Generator 

Electric Motor 

Electrical Wire

Temperature Switch

Electrical Symbols (Electrical)

T

Pressure Symbol

Temperature Symbol

Level Symbol

Flow Symbol

Wire Number Identifi cation Codes

Electrical Schematic Example

Hydraulic Schematic Example Current Standard

Current Standard Harness identification code This example indicates wire 135 in harness "AG".

Wire Circuit Number Identification

Wire Color 

325-AG135 PK-14 325-PK Circuit Identification Number 

Wire Color 

Wire Gauge

Previous Standard Wire Color 

Wire

325-PK-14 B Circuit Number Identification

 A

Wire Gauge (EXAMPLE VALVE)

FLUID POWER SYMBOLS BASIC COMPONENT SYMBOLS

MAIN   AUX.

PUMP or MOTOR

SPRING (ADJUSTABLE)

VARIABILITY

CONTRO L VALVES

SPRING

FLUID CONDITIONER

LINE RESTRICTION (FIXED)

RESTRICTION

PRESSURE COMPENSATION

LINE RESTRICTION (VARIABLE)

2-SECTION PUMP

HYDRAULIC PNEUMATIC ENERGY TRIANGLES

TWO POSITION

PUMP: VARIABLE and PRESSURE COMPENSATED

 ATTACHMENT

LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED

VALVES

VALVE ENVELOPES

ONE POSITION

 

VALVE PORTS

TWO-WAY

THREE POSITION

 

 

THREE-WAY

CONTROL VALVES

FOUR-WAY

CHECK VALVES

 A B

 A B

P T SHIFTED POSITION

P T NORMAL POSITION

INFINITE POSITION

SHUTTLE

SPRING LOADED

BASIC SYMBOL

PILOT CONTROLLED

FLUID STORAGE RESERVOIRS

VENTED

RETURN ABOVE FLUID LEVEL

PRESSURIZED

RETURN BELOW FLUID LEVEL

MEASUREMENT

PRESSURE

 

TEMPERATURE

ROTATING SHA FTS

 

FLOW

UNIDIRECTIONAL

BIDIRECTIONAL

COMBINATION CONTROLS

SOLENOID

SOLENOID or MANUAL

SOLENOID and PILOT or MANUAL

SOLENOID and PILOT

SERVO

 

THERMAL

DETENT

MANUAL CONTROL SYMBOLS

PUSH-PULL LEVER

MANUAL SHUTOFF

RELEASED PRESSURE

EXTERNAL RETURN

SPRING LOADED

HYDRAULIC PUMPS VARIABLE DISPLACEMENT NON-COMPENSATED

LINES CROSSING

LINES JOINING

PEDAL

 

VARIABLE DISPLACEMENT NON-COMPENSATED

UNIDIRECTIONAL

UNIDIRECTIONAL

BIDIRECTIONAL

BIDIRECTIONAL

 

COMPLETE

INTERNAL SUPPLY PRESSURE

HYDRAULIC AND PNEUMATIC CYLINDERS

SINGLE ACTING

HYDRAULIC MOTORS FIXED DISPLACEMENT

SPRING

REMOTE SUPPLY PRESSURE

SIMPLIFIED

CROSSING AND JOINING LINES

GAS CHARGED

PUSH BUTTON

PILOT CONTROL SYMBOLS

INTERNAL RETURN

 ACCUMULATORS

FIXED DISPLACEMENT

GENERAL MANUAL

DOUBLE ACTING

INTERNAL PASSAGEWAYS INFINITE POSITIONING

FLOW IN ONE DIRECTION

THREE POSITION

PARALLEL FLOW

TWO POSITION

CROSS FLOW

FLOW ALLOWED IN EITHER DIRECTION

8

9

F

(15) CYLINDER GP TILT 242-4220 TILT (MID LIFT) 247-0497 TILT (HIGH LIFT) 245-7491 TILT (LOGGER) 245-7487

(23) VALVE GP MANUAL LOWERING 112-1817

TILT

XX

YY

7

(20) CYLINDER LIFT (LH) 242-4272

(36) VALVE GP CONTROL 2 FUNC STD 261-4171 2 FUNC W/RC 261-3682 2 FUNC W/RC 261-3683 3 FUNC STD 261-4172 3 FUNC W/RC 274-8055

6

(21) CYLINDER LIFT (RH) 242-4271

LIFT

4

5

2

3

(46) SWITCH AS FOOTBRAKELIMIT 105-6117

(41) ACCUMULATOR RIDE CONTROL (RC) 245-2973 PORT BLEVERREARWARD RIGHT HANDLINEONBOOM (WHENVIEWEDFROM CAB)

3RDFUNCTION

(24) ACCUMULATOR PILOT OIL 245-2975

PORT ALEVERFORWARD LEFT HANDLINEONBOOM (WHENVIEWEDFROM CAB)

(ATTACHMENT)

FRONT AXLE

(47) SENSOR GP FOOTBRAKE 214-4863

1

(49) ACCUMULATOR SERVICE BRAKE 213-8773

(45) CONTROLGP FOOTBRAKE 193-1448 TOBRAKE LIGHTS

(51) VALVE GP PARKING BRAKE 106-1774

(53) SWITCH AS BRAKE PRESSURE  A2 175-3244

H

F

 A1

NO

RELIEF 272-2334

RELIEF 272-7003 256-2866

(52) SWITCH AS PARKING BRAKE PRESSURE 174-4312

NC

TOTRANSMISSION CONTROL

C

C

QQ

RELIEF 272-2334

RELIEF 272-7003

PP

(25) PUMP GP FAN 254-5146

RAISE

RR

HEAD END

RACK BACK

F TOFANMOTOR P

LS

RAISE

BACK HOLD

T

(48) VALVE GP (30) MANIFOLD GP FOOTBRAKE 215-3687 FAN AND BRAKE CHARGE 242-1307

RELIEF 4T-7581

RACK

CC

129-8090

PS

R

E

(50) ACTUATOR AS PARKING BRAKE

RELEASE  APPLY

REARAXLE

PORT  A

HOLD

TO CASEDRAIN MANIFOLD

E

HOLD

DUMP

(8) CYLINDER GP STEER 163-0324

RELIEF 282-4349

PORT B

LOWER

(12) SCREEN GP 154-2883

(10) VALVE GP PILOT 147-1790

 A1

FLOAT

HYDRAULIC TANK

BRAKE SYSTEM

GG

LL

(7) VALVE GP STEER 124-8635

KK CROSSOVER RELIEF CYL PORT "B"

CYL PORT "A" SHUTTLEVLV

LOWER/

DUMP

FLOAT

RELIEF 247-8632

LS

PORT “B”

RELIEF 254-5789

LOADSENSING PUMPPORT

DR

DIRECTIONAL SPOOL PILOTPORT"A"

D

(6) VALVE GP NEUTRALIZER 8J-1553 (55) CYLINDER GP QUICK COUPLER 237-0946 QUICK COUPLER(ATTACHMENT)

D MAKEUP CHECK

PILOTPORT"B" TANKPORT

LINE PATTERNS

(30) MANIFOLD GP FAN AND BRAKE CHARGE 242-1307

Pressure Line

BACKUP RELIEF PRESSURE REDUCING VALVE

Drain / Return Lines

TO REAR BRAKES

 A1

MM

NN

Pilot / Load Sensing Pressure TO FRONT BRAKES

(9) VALVE GP CHECK 111-7775

B1

ComponentGroup

A2

 Attachment

CALLOUTS

PS YY

Taps

(11) VALVE GP SHUTTLE 8J-6875

 A1

 Air Line

REGULATED PRESS. PORT TO PILOT VALVE

E1

(Pressure, Sampling, Sensor - ByLetter)

D1 C

C

C1

FF

(54) VALVE GP QUICK COUPLER 180-8585

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

COMMAND CONTROL STEERING ATTACHMENT

IMPLEMENT PUMP OUTPUT IMPLEMENT PILOT SUPPLY OIL PRIMARY STEERING PUMP CIRCUIT STEERING CIRCUIT

(56) VALVE GP MANUAL 112-1817

(5) VALVE GP STEER 142-4000

SECONDARY STEERING CIRCUIT IMPLEMENT PUMP LOAD SENSING CIRCUIT

PILOT CONTROL SPOOL

MAIN RELIEF VALVE LOAD SENSING CIRCUIT SUPPLY LINE

F

(4) VALVE GP NEUTRALIZER 146-7571

DRAIN / RETURN LINE LIFT CYLINDER CIRCUIT TILT CYLINDER CIRCUIT

CYL PORT "B"

 AUXILIARY CIRCUIT

P

LS

BRAKE CHARGE VALVE AND FAN CONTROL CIRCUIT

T

BRAKE CONTROL CIRCUIT

PILOT PORT "B"

(27) VALVE GP COOLER BYPASS 244-1426 B

HH

(26) MOTOR GP FAN 246-6152

Connection B1 Only For Command Control Steering (14) PUMP GP IMPLEMENT 254-4108

 AA

EE

E1

(13) PUMP GP STEERING 241-9299

SOS

(35) PUMP GP SECONDARY STEER 275-8544

DD (28) FILTER GP RETURN OIL 244-1031

(2) CONNECTOR ORIFICE 122-2340

B1

(34) VALVE GP SECONDARY STEER DIVERTER 141-2597

E1 D1

CROSSOVERRELIEF CYL PORT "A"

(1) HAND METERING UNIT 230-4176

DIRECTIONALSPOOL

PUMPPORT

(25) PUMP GP FAN 254-5146 (31) FILTER GP CASE DRAIN 249-2334

(3) CYLINDER GP STEER 230-4176

BACK-UPRELIEF

MAKE-UPCHECKS

C1

C1

FF

 A

HMUSUPPLY PORT

 A

(32) VALVEGP BREAKER RELIEF 220-0814

9

B

PILOT PORT "A"

HMU STEER AND 3PC IMPLEMENT (33) TANK GP HYDRAULIC OIL 237-2742

8

7

THIS SCHEMATICIS FORTHE 950H, 962H, ANDIT62H WHEEL LOADER HYDRAULICSYSTEM MEDIANUMBER RENR8879-05 SCHEMATICPART NUMBER241-0475, CHANGE09, VERSIONBRAKESYSTEM PART NUMBER244-1398, CHANGE00, VERSION-

D1 6

5

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, specifi cations and systems operations.

4

3

2

1

FAN AND BRAKE PUMP VIEW ALL CALLOUTS

25

 AA

30

HH

FAN AND BRAKE PUMP VIEW ALL CALLOUTS

25

 AA

30

HH

FAN A ND BRAK E HYDRAULIC SYSTEM

The fan and brake pump (25) is located on the front gear train of the engine, on the right side of the machine. 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 accumulator charging valve (30). The fan pump load sense pressure tap (HH) is located above the brake charging valve.

HMU AND SERVICE BRAKES VIEW ALL CALLOUTS

RR

48

FF

QQ

1

The following components are located under the front of the cab. -

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)

IMPLEMENT CONTROL VALVE VIEW ALL CALLOUTS

 A

B

C

N

D

 A

B

H

C

D CC

K

E

M

CC

J

F

L

E

H

G

K

F

GG

24

J

G

DD

This photo shows a front view of the implement control valve (36) in the loader frame. The This photo shows a left rear view of the implement control valve (36). The following components can This drawing shows a right side view of the wheel loader. The following components can be seen following components can be seen in this view: in this view: be seen in this view: - Pilot accumulator (24) - Pilot supply pressure tap (GG)

- Implement pump pressure tap (CC) - Implement pump load Sense pressure tap (DD)

- Implement control valve supply pressure tap (GG) The Following components are not referenced on the Hydraulic System Schematic:

The Following components are not referenced on the Hydraulic System Schematic: - Pressure differential relief valve (A) - Head end solenoid valve (ride control) (B) - Signal relief valve (C) - Tilt anti-drift valve (D) - Rod end solenoid valve (ride control) (E) - Ride control balance solenoid valve (F) - Pilot pressure reducing valve (G) - Lift cylinder head end pressure tap (H) - Lift cylinder head end pressure sensor for Payload Control System and Autodig (J) - Hydraulic lockout solenoid valve (K)

- 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)

SERVICE CENTER VIEW ALL CALLOUTS

SOS

 A

31

28

49

B

 A

B

EE

PP

F

M

E

G

D

L

C

C

H

J

K

The service center is located on the right side of the machine below the cab. The Following The following remote pressure taps are located inside the panel on the frontside of the components are located in the service center: service center: - Case drain filter (31) - Hydraulic oil fluid sampling valve (SOS) - Hydraulic systems kidney loop filter (28) - Brake system accumulators (49)

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

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

- 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)

- Power train oil fluid sampling valve (A) - Power train oil filter (B) - Ecology drain for the hydraulic tank (C)

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

SERVICE CENTER VIEW ALL CALLOUTS

SOS

 A

31

28

49

B

 A

B

EE

PP

F

M

E

G

D

L

C

C

H

J

K

The service center is located on the right side of the machine below the cab. The Following The following remote pressure taps are located inside the panel on the frontside of the components are located in the service center: service center: - Case drain filter (31) - Hydraulic oil fluid sampling valve (SOS) - Hydraulic systems kidney loop filter (28) - Brake system accumulators (49)

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

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

- 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)

- Power train oil fluid sampling valve (A) - Power train oil filter (B) - Ecology drain for the hydraulic tank (C)

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

TILT CYLINDER LINES GROUP VIEW ALL CALLOUTS

15 XX

YY

TILT CYLINDER LINES GROUP VIEW ALL CALLOUTS

15 XX

YY

RIGHT SIDE VIEW

YY

15 XX

VIEW A - A