UENR1686UENR1686-02_SIS

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

Click on any text th at is BLUE and and und erlined. These These are hyperlin hyperlin ks t hat can be used to n avigate the schematic schematic and m achine views.

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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UENR1686-02 January 2015

966H and 972H Wheel Loader  Hydraulic System 966H:

972H:

BJ61-UP

NPE1-UP

BS61-UP

WXZ1-UP

© 2015 Caterpillar, All Rights Reserved

Printed in U.S.A.

COMPONENT LOCATION Page 1 of 2 Part Number

Machine Location

Schematic Location

 Acc umulator - Pilot

355-9981

1

F-3

 Acc umulator - Ride Control

362-8659

2

F-1

Breather

258-2829

3

C-7

Cylinder GP - Lift (LH)

242-4274

4

F-2

Cylinder GP - Lift (RH)

242-4275

5

F-2

Cylinder GP - Tilt (966 Standard)

356-2219

6

F-3

Cylinder GP - Tilt (972 Standard)

356-2220

7

F-3

Cylinder GP - Tilt (966 High Lift - ATCH)

358-5189

8

F-3

Cylinder GP - Tilt (972 High Lift - ATCH)

358-5190

9

F-3

Cylinder GP - Tilt (966 Logger - ATCH)

356-2220

10

F-3

Filt er GP - Case Drain

382-1511

11

C-8

Pump GP - Implement

292-8768

12

D-7

Screen - Return

9T-9227

13

C-7

Tank GP - Hydraulic Oil

368-2756

14

C-7

Valve GP - 2 Funct ion W/O Ride Control

384-3946

15

F-1

Valve GP - 2 Funct ion W/ Ride Control (ATCH)

363-8114

16

F-1

Valve GP - 2 Funct ion W/ Ride Control (ATCH)

370-7350

18

F-1

Valve GP - 3rd Function Aux Implement

366-8542

19

D-1

Valve GP - Dead Engine Lower

112-1817

21

F-4, F-5

Valve GP - Relief (Aux Funct ion)

9T-1573

22

C-1

Valve GP - Relief (Load Sense)

375-3789

23

E-3

Valve GP - Relief (Ride Control)

224-4530

26

E-1

Valve GP - Relief

332-1985

27

F-2

Valve GP - Relief (Logger ATCH)

332-1986

28

F-2

Valve GP - Anti-Drift

328-4314

30

F-2, F-3

Valve GP - Press Limiting (Ride Control)

373-9483

31

E-1

Valve GP - Pressure Reducing

313-7668

32

F-2, E-2, D-1

Cylinder GP - St eering

369-4182

35

B-5, B-1

Neutralizer - HMU

296-5662

36

B-3

Orifice

108-2144

38

B-3

Pump GP - HMU M etering

349-6093

39

B-3

275-8544

40

C-7

Pump GP - Steering

387-7873

41

D-6

Screen (ATCH)

154-2883

42

B-5

Valve GP - Check (ATCH)

141-2597

43

C-7

Valve GP - Check (CCS ATCH)

111-7775

44

A-6

Valve GP - P ilot (CCS ATCH)

164-4116

45

B-6

Valve GP - Press ure Reducing (ATCH)

114-1267

46

A-5

Valve GP - S huttle (ATCH)

8J-6875

47

A-6

Valve GP - S teering Back up Relief

132-5258

48

B-2, A-5

Valve GP - Steering (CCS ATCH)

133-1728

49

B-5

Valve GP - Steering Crossover Relief

129-8222

50

B-5

Valve GP - Steering HMU

142-3996

51

C-2

Description Impleme nt System

Steering System

Pump GP - Secondary Steering Pump/Motor (ATCH)

COMPONENT LOCATION Page 2 of 2 Part Number

Description

Machine Schematic Location Location

Fan / Brake System  Acc umulator - Brake

198-9841

52

E-8

 Actuator AS - Parking Brake

154-8042

53

F-6

Cooler - Hydraulic Oil

244-4498

55

D-8

Filter GP - Kidney Loop

378-8331

56

D-8

Motor GP - Fan

161-8919

57

D-8

Motor GP - Fan (ATCH)

334-6234

58

D-8

Pump GP - Fan

254-5147

59

D-8

Valve GP - Charge (Fan Drive and Brake)

352-1587

Valve GP - Charge (Fan Drive and Brake) (Non-CE)

366-9855

60

E-8

Valve GP - Check (Filter Anti-Drainback)

307-5393

61

D-8

Valve GP - Check (Cooler Bypass)

244-1426

62

D-8

Valve GP - Foot Brake

210-5587

63

F-7

Valve GP - Park Brake

106-1774

64

F-6

Valve GP - Sampling Port

8C-3451

65

D-8

237-8180

66

C-8

Cylinder GP - Quick Coupler (ATCH)

311-1463

67

F-5

Valve GP - Quick Coupler (ATCH)

371-9415

68

E-5

Pump GP -Transmission

241-8686

69

D-7

Solenoid GP - Pilot Pressure

333-8242

70

F-3

Solenoid GP - Ride Control Activiation

277-8863

71

F-1

Solenoid GP - Ride Control Charge/Balance

251-3268

72

E-1

Valve GP - Neutralizer (CCS ATCH)

321-5283

73

A-6

Valve GP - Back Pressure

349-8844

74

E-3

Valve GP - Check

123-4750

75

E-4

Valve GP - Check

6E-4701

76

E-4

Valve GP - Margin Relief

370-5764

77

E-3

Valve GP - Pressure Reducing

367-8969

78

E-4

Axle Cooler System Valve GP - Diverter (ATCH) Quick Coupler (ATCH)

Miscellaneous

TAP LOCATION

Tap Number 

B C D G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 SOS

 

Description

 

Front Brake Pressure Rear Brake Pressure Park Brake Pressure Brake Accumulator Pressure Implement Pump Discharge Pressure Implement Pump Load Sense Pressure Implement Pump Pilot Pressure Steering Pump Discharge Pressure Steering Pump Load Sense Pressure Fan Pump Discharge Pressure Fan Pump Load Sense Pressure CCS Steering Neutral Pilot Pressure CCS Steering Left Pilot Pressure CCS Steering Right Pilot Pressure CCS Steering Resolved Pilot Pressure Case Drain Air Bleed Fluid Sampling Port

Schematic Location

F-8 B-8 F-6 E-8 E-3 D-7 F-4 D-7 B-3, B-4 D-7 D-8  A-7 B-5 B-5  A-6 D-8 D-8

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

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)

8

7

6

5

4

3

 AXLE OILCOOLERSUPPLY

2

TILTCYLINDER

(21)VALVEGP DEADENGINELOWER 112-1817

(67)CYLINDERGP QUICKCOUPLER(ATCH) 311-1463

TOBRAKE LIGHTS  AXLE

(63)VALVEGP FOOTBRAKE 210-5587

TOTRANSMISSION   CONTROL

(64)VALVEGP PARK BRAKE 106-1774

RELEASE  APPLY

NO

RESERVIOR

(70)SOLENOIDGP PILOTPRESSURE 333-8242

NC

F

FRONTAXLE

C

C

NO

(15)2FUNCTIONW/ORIDECONTROL 384-3946 (16)2FUNCTIONW/RIDE CONTROL(ATCH) 368-8114 (71)SOLENOIDGP (18)2FUNCTIONW/RIDE CONTROL(ATCH) 370-7350 RIDE CONTROL  ACTIVIATION 277-8863

F

PS (AUX)

E2

C

D

IMPLEMENTVALVEGP

 ACC

NC

B

(5)CYLINDERGPLIFT(RH) 242-4275

(27)VALVEGPRELIEF (STANDARD) 332-1985 (32)VALVEGP (28)VALVEGPRELIEF PRESSURE REDUCING (LOGGER ATCH) 332-1986 313-7668

(1)ACCUMULA TORPILOT 355-9981

(53)ACTUATORAS PARK BRAKE 154-8042

1

(4)CYLINDERGP LIFT(LH) 242-4274

(6)966STANDARD 356-2219 (7)972STANDARD 356-2220 (8)966HIGHLIFT(ATCH) 358-5189 (9)972HIGHLIFT(ATCH) 358-5190 (10)966LOGGER(ATCH) 356-2220

(2)ACCUMUL ATOR RIDE CONTROL 362-8659

(76)VALVE GP CHECK 6E-4701 (78)VALVEGP PRESSURE REDUCING 367-8969

TRANSMISSION  CONTROL

E3

(30)VALVEGP  ANTI DRIFT 328-4314

G4

 AXLE OILCOOLERRETURN

E5

RACK

RAISE

BACK

PS

(52)ACC BRAKE 198-9841

E7

(30)VALVEGP  ANTI DRIFT 328-4314

(21)VALVEGP DEADENGINELOWER 112-1817

 ACC

T

(74)VALVEGP BACK PRESSURE 349-8844

(68)VALVEGP QUICKCOUPLER(ATCH) 371-9415

RACK RAISE

BACK

(77)VALVEGP MARGINRELIEF 370-5764

G2

HOLD

(26)VALVEGP RELIEF (RIDE CONT) 224-4530

HOLD

(31)VALVEGP PRESS LIMITING (RIDE CONT) 373-9483

P

G1

E

 A1

DUMP

E11

A2

LOWER

(75)VALVE GP CHECK 123-4750

NC NO

E

FLOAT

PS

C

E8

QUICK COUPLERSUPPLY

(60)VALVE GP CHARGE (FANDRIVEANDBRAKE)352-1587 (FANDRIVEANDBRAKE NONE-CE)366-9855

(72)SOLENOIDGP RIDE CONTROL CHARGE/BALANCE 251-3268

LS

(23)VALVEGPRELIEF (LOADSENSE)

E1

375-3789

(57)MOTORGP FAN 161-8919 (58)MOTORGP FAN (ATCH)334-6234

(32)VALVEGP PRESSURE REDUCING

DUMP

LOWER/FLOAT

313-7668 E4

E6 RCMANIFOLD

LS1

F

(62)VALVE GPCHECK (COOLER BYPASS) 244-1426

P (AUX)

DR1

IMPLEMENTRETURN

P

LS (59)PUMPGPFAN 254-5147 (55)COOLER HYDRAULICOIL 244-4498

IMPLEMENTLOADSENSERELIEF/PILOTRETURN IMPLEMENTPUMPDISCHARGE

(19)VALVEGP3RDFUNCTION  AUX IMPLEMENT 366-8542

E9

(12)VALVE GP IMPLEMENT 292-8768

G5

PORT  A

PRIMARYPILOTSUPPLY-CCS STEERINGATTACHMENT

D

LS

(65)VALVEGP SOS SAMPLING PORT 8C-3451

(56)FILTERGP KIDNEYLOOP 378-8331

IMPLEMENTLOADSENSESIGNAL

G3 X

(61)VALVEGP CHECK (FILTER  ANTI-DRAINBACK) 307-5393

D

PORTBLEVERFORWARD, LEFT HANDLINE ONBOOM (WHENVIEWEDFROMCAB)

T

G7

G8

PORTALEVERREARWARD, RIGHT HANDLINE ONBOOM (WHENVIEWEDFROMCAB)

(69)PUMPGP B TARNSMISSION 241-8692

PORT

(32)VALVEGPSOLENOID PRESSURE REDUCING 313-7668

 A

HOLD

L

LS

S

LS

PORT B

LS

G13

(22)VALVEGPRELIEF (AUX FUNCTION) 9T-1573

(41)PUMPGP STEERING 387-7873

(66)VALVEGP DIVERTER(ATCH) 237-8180

(11)FILTERGP CASEDRAIN 241-8692

PORT B

E10

M P P P

(40)PUMPGP SECONDARYSTEERING PUMP/MOTOR(AT CH) 275-8544

C

(43)VALVEGPCHECK (ATCH) 141-2597

C

(3)BREATHER 258-2829 T

(51)VALVE GP STEERING (HMU) 142-3996

T T

(50)VALVEGPSTEERING CROSSOVERRELIEF 129-8222 (14)TANKGP HYDRAULICOIL 368-2756

C

PB

(13)SCREEN RETURN 9T-9227

 AXLE

(35)CYLINDERGP STEERING 369-4182

B

(35)CYLINDERGP STEERING 369-4182

(36)NEUTRALIZERHMU 296-5662

 A PA

REARAXLE

(38)ORIFICE 108-2144 L

RESERVIOR

B

R (39)PUMPGP HMUMETERING 349-6093

(49)VALVEGPSTEERING   (CCS ATCH) 133-1728

(50)VALVEGPSTEERING CROSSOVERRELIEF 129-8222 B

(42)SCREEN(ATCH) 154-2883

T

LS

LS

G10 G11

(45)VALVEGP PILOT(CSS ATCH) 164-4116

B P

HMU

 A

T

G6

G6 PA

P

(48)VALVEGPSTEERING BACKUPRELIEF 132-5258

HMUSTEERING (STANDARDCONFIGURATION)

PB

(73)VALVEGP NEUTRALIZER (CCS ATCH) 321-5283

T

P

LINE PATTERNS

(44)VALVEGPCHECK (CSS ATCH) 111-7775 SOLENOID VALVEREFERENCE

 A 

P SOL ENOI DL O CAT ON I

FAN/ BRAKE VALVE

DEMANDFANSPEEDSOLENOI D

E2

IMPLEMEN TVALVE

IMPLEME NTPILOTSUPPORTSOLENOID

E3

IM P LE M E NT VA LV E- TI LT

RA C KS O L EN O ID

E4

IM P LE M E NT VA LV E- TI LT

DU M PS OL E NO ID

E5

IM P LE M E NT VA LV E- LI FT

RA I SE SO L E NO D I

E6

I MP LE ME NT V AL VE - L F I T

L OW ER / F LO AT S OL EN OI D

E7

IMPL EMEN TVALVE -RIDE CONTR OL

RIDE CO NTROLACTI VATIO NSOLENOID

E8

IMPL EMEN TVALVE -RIDE CONTR OL

RIDE CO NTROLCHAR GE / BALANC E SOLENOID

3RDFUNCTIONAUXILI ARYVALVE

3RDFUNCTIONPORTA SOLENOID

E10

3RDFUNCTIONAUXILI ARYVALVE

3RDFUNCTIONPORTB SOLENOID

E11

E9

QUICKCOUPLERVALVE

DISENGAG E SOLENOID

8

T

G12

S O LE N OI DNAME

E1

Pilot / LoadSensingPressure

(48)VALVEGPRELIEF STEERING BACKUP 132-5258

Drain/ ReturnLines

G9

ComponentGroup  AirLine

(47)VALVEGP SHUTTLE (ATCH) 8J-6875

CALLOUTS

COMMANDCONTROLSTEERING (ATTACHMENT) YY

Callout Number  (MachineLocationfrom Component LocationsTable)

7

HYDRAULICCI RCUIT COLORDESCRI PTIONS

PressureLine (46)VALVEGPPRESSURE REDUCING (ATCH) 114-1267

6

5

4

Taps (Pressure,Sampling,Sensor-byletter) (52)VALVE GP-CONTROL 138-1234 PartNumber 

3

Component Name

IMPLEMENT PILOT SUPPLY OIL IMPLEMENT PUMP OUTPUT TRANSMISSIONPUMP PRIMARY STEERING PUMP CIRCUIT IMPLEMENT PUMP LOADSENSE CIRCUIT STEERING CIRCUIT FANPUMPCIRCUIT SUPPLY LINE QUICKCOUPLERCIRCUIT BRAKECONTROLCIRCUIT DRAIN/ RETURNLINE TILTCYLINDERCIRCUIT LIFTCYLINDERCIRCUIT SECONDARY STEERING CIRCUIT BRAKECOOLINGCIRCUIT ELECTRICALCIRCUITS

 A 

THIS SCHEMATICIS FORTHE 966HAND972H WHEEL LOADERHYDRAULIC SYSTEM

MEDIA NUMBER: UENR1686-02 HYDRAULICSCHEMATIC PART NUMBER: 398-8003, CHANGE: 01, VERSION: BRAKE SCHEMATICPART NUMBER: 237-4335, CHANGE: 01, VERSION: Componentsareshowninstalledona fullyoperablemachinewiththekeyand engineoff,transmissionshifter  inneutralandwithparkingbrakeset. RefertotheappropriateServiceManualforTroubleshooting, Specifications andSystemsOperations. RefertothePartsManualusinga specificserialnumberprefixinSISbeforeorderingpartsfromthisschematic.

2

1

LEFT SIDE FRONT VIEW (CCS STEERING) VIEW ALL CALLOUTS

44

49 50 46 42

53 45

G12

D

LEFT SIDE FRONT VIEW (HMU STEERING) VIEW ALL CALLOUTS

31

22 30 27 23

1

73 36 64

38

32 32

5

2 70 15 16

18 19

68

72

71

35

LEFT SIDE REAR VIEW VIEW ALL CALLOUTS

62

58 43

40

60

RIGHT SIDE FRONT VIEW (HMU STEERING) VIEW ALL CALLOUTS

26

28 G9

63

6

7

8

9

10

39 51

4

75

G3 G2

21 2 77

76

74

67

RIGHT SIDE REAR VIEW VIEW ALL CALLOUTS

3 57

55

13

14

G13

65

41

59

G5

51

78 G8 G7

G4

69

12

52

11

56

61

RIGHT SIDE VIEW (CCS STEERING) VIEW ALL CALLOUTS

SOS

G6

66

48

G1

G11

C

G10

B

47