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

SCHEMATIC PART NUMBER: 242-0337, CHANGE: 10, VERSION: -

Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.

MEDIA NUMBER: RENR8828-04

THIS SCHEMATIC IS FOR THE 966H AND 972H WHEEL LOADER HYDRAULIC SYSTEM

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A

B

C

D

E

F

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A

B

C

D

E

F

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

IMPLEMENT PILOT SUPPLY OIL

BRAKE COOLING CIRCUIT

IMPLEMENT PUMP OUTPUT

TRANSMISSION PUMP

PRIMARY STEERING PUMP CIRCUIT

IMPLEMENT PUMP LOAD SENSE CIRCUIT

STEERING CIRCUIT

FAN PUMP CIRCUIT

SUPPLY LINE

QUICK COUPLER CIRCUIT

BRAKE CONTROL CIRCUIT

AUXILIARY CIRCUIT

MAIN RELIEF VALVE LOAD SENSING CIRCUIT

DRAIN / RETURN LINE

TILT CYLINDER CIRCUIT

LIFT CYLINDER CIRCUIT

SECONDARY STEERING CIRCUIT

ELECTRICAL CIRCUITS

LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing Pressure

Pressure Line

CALLOUTS

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

(52) VALVE GP - CONTROLCallout Number(Machine Location from

138-1234Component LocationsTable)

ComponentName

Part Number

HMU

PA

PB

T

B

A

P

L R

PT

LS

LS P T

PS

A1 A2

E1

F

IMPLEMENT PUMP DISCHARGE

IMPLEMENT LOAD SENSE SIGNAL

IMPLEMENT LOAD SENSE RELIEF/PILOT RETURN

QUICK COUPLER SUPPLY

IMPLEMENT RETURN

AXLE OIL COOLER RETURN

AXLE OIL COOLER SUPPLY

B

SL

X

M

LS

REAR AXLE

P T

T

P

LS

PA

PB

B A

PORT A LEVER REARWARD,LEFT HAND LINE ON BOOM(WHEN VIEWED FROM CAB)

PORT B LEVER FORWARD, RIGHT HAND LINE ON BOOM(WHEN VIEWED FROM CAB)

RACKBACK

DUMP

HOLD

DUMP

RAISE

LOWER/FLOAT

RAISE

HOLD

LOWER

FLOAT

HOLD

PORTA

PORTB

PORTA

PORTB

E5

E6

E4

RACKBACK

E2

E3

E7

E8

E9

E10

E11

E12E13

B1A1 A2 B2 A3 B3 A4B4

PRIMARY PILOT SUPPLY - CCS STEERING ATTACHMENT

FRONT AXLE

E14

T

P

P

LS

LS

P

T

T

NC

NO

CC

TO TRANSMISSION CONTROL

TO BRAKELIGHTS

APPLY

RELEASE

AXLE

RESERVIOR

AXLE

RESERVIOR

TRANSMISSION

CONTROL

C

NO

NC

LS

COMMAND CONTROL STEERING (ATTACHMENT)

HMU STEERING (STANDARD CONFIGURATION)

(63) VALVE GPOUTPUT

PRESSURE210-5587

(64) VALVE GPPARK BRAKE

106-1774(53) ACTUATOR ASPARK BRAKE154-8042

(67) CYLINDER GPQUICK COUPLER

311-1463

(68) VALVE GPQUICK COUPLER180-8585

(21) VALVE GPMANUAL LOWER112-1817

TILT CYLINDER(6) 966 STANDARD 356-2219(7) 972 STANDARD 356-2220(8) 966 HIGH LIFT 358-5189(9) 972 HIGH LIFT 358-5190(10) 966 LOGGER 356-2220

(4) CYLINDER GPLIFT - (LH)

242-4274

(5) CYLINDER GPLIFT - (RH)242-4275

(2) ACCUMULATORRIDE CONTROL325-7131

(1) ACCUMULATORPILOT355-9981

(23) VALVE GPLOAD SENSERELIEF346-0474

(32) VALVE GPPRESSUREREDUCING313-7668

(32) VALVE GPPRESSUREREDUCING313-7668

(32) VALVE GPPRESSUREREDUCING313-7668

(25) VALVE GPMARGINRELIEF328-0730

(35) CYLINDER GPSTEERING314-9336

(50) VALVE GPSTEERINGCROSSOVER RELIEF129-8222

(48) VALVE GPSTEERING

BACKUP RELIEF132-5258

(51) VALVE GPSTEERING (HMU)

142-3996

(11) FILTER GPCASE DRAIN337-4102

(3) BREATHER258-2829

(14) TANK GPHYDRAULIC340-5959

(54) BREAKERVACUUM220-0814

(33) VALVE - MANUALPUMP CASE FILL8T-6907

(13) SCREEN - RETURN 9T-9227

(66) VALVE GPDIVERTER237-8180

(56) FILTER GPKIDNEY LOOP330-9358

(61) VALVE GPCHECK (FILTERANTIDRAINBACK)307-5393

(55) COOLERHYDRAULIC OIL244-4498

(59) PUMP GPFAN

254-5147

(62) VALVE GPCHECK(COOLERBYPASS)244-1426

(65) VALVE GPSAMPLING PORT8C-3451

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

MOTOR GP - FAN

(60) VALVE GPCHARGE (FANDRIVE ANDBRAKE)352-1587

(52) ACCUMULATORBRAKE

198-9841

(21) VALVE GP - LOWER(DEAD ENGINE)

112-1817

(20) VALVE GPBACKPRESSURE

353-7179

(12) VALVE GPIMPLEMENT

292-8768

(69) PUMP GPTARNSMISSION

241-8686

(41) PUMP GPSTEERING241-9157

(43) VALVE GPCHECK

141-2597

(40) PUMP GPSECONDARYSTEERING (ATCH)275-8544

(47) VALVE GPSHUTTLE (ATCH)8J-6875

(45) VALVE GPPILOT (CSS ATCH)

164-4116

(44) VALVE GPCHECK

(CSS ATCH)111-7775

(37) NEUTRALIZERCCS (ATCH)321-5283

(42) SCREEN (ATCH)154-2883

(50) VALVE GP - STEERINGCROSSOVER RELIEF

111-7775

(46) VALVE GP - PRESSUREREDUCING (ATCH)

114-1267

(48) VALVE GP - RELIEFSTEERING BACKUP

132-5258

(49) VALVE GP - STEERING(CCS ATCH)133-1728

(34) CYLINDER GPSTEERING314-9336

(39) PUMP GPHMU METERING349-6093

(38) ORIFICE108-2144

(36) NEUTRALIZERHMU296-5662

(22) VALVE GP - RELIEF(AUX FUNCTION)272-2334

IMPLEMENT VALVE GP

(15) 2 FUNCTION W/O RIDE CONTROL 261-3945(16) 2 FUNCTION W/ RIDE CONTROL (ATCH) 261-2337(17) 3 FUNCTION W/O RIDE CONTROL (ATCH) 261-3972(18) 3 FUNCTION W/ RIDE CONTROL (ATCH) 261-3338(19) 3 FUNCTION W/ RIDE CONTROL (LOGGER ATCH) 256-3644

(31) VALVE GPPRESSUREREDUCING335-1074

(32) VALVE GPSOLENOID(PRESSUREREDUCING)313-7668

(32) VALVE GPSOLENOID

(PRESSUREREDUCING)

313-7668

(32) VALVE GPSOLENOID(PRESSUREREDUCING)313-7668 (26) VALVE GP - RELIEF

(RIDE CONTROL)4T-7581

(29) VALVE GP - SHUTTLE235-6157

(30) VALVE GPSOLENOID

(ANTI-DRIFT)328-4314

(30) VALVE GPSOLENOID

(ANTI-DRIFT)328-4314

(30) VALVE GPSOLENOID

(ANTI-DRIFT)328-4314

(27) VALVE GPRELIEF (TILT)

332-1985

(28) VALVE GPRELIEF

(LOGGER ATCH)332-1985

(24) VALVE GPRELIEF

(MAKE UP LIFT)234-4869

G12

SOS

G7 G6

G3

G4

G2

G10

G5G5

G1

G8

G11

G9G10

SOLENOID VALVE REFERENCESOLENOID LOCATION SOLENOID NAME

E1 FAN / BRAKE VALVE DEMAND SPEED FAN SOLENOID

E2 IMPLEMENT VALVE - LIFT LOWER SOLENOID

E3 IMPLEMENT VALVE - LIFT RAISE SOLENOID

E4 IMPLEMENT VALVE - RIDE CONTROL RIDE CONTROL BALANCE SOLENOID

E5 IMPLEMENT VALVE - RIDE CONTROL RIDE CONTROL HEAD END CHECK SOLENOID

E6 IMPLEMENT VALVE - RIDE CONTROL RIDE CONTROL ROD END CHECK SOLENOID

E7 IMPLEMENT VALVE - TILT DUMP SOLENOID

E8 IMPLEMENT VALVE - TILT RACK BACK SOLENOID

E9 IMPLEMENT VALVE IMPLEMENT PILOT SUPPORT SOLENOID

E10 IMPLEMENT VALVE - 3RD FUNCTION 3RD FUNCTION PORT A SOLENOID

E11 IMPLEMENT VALVE - 3RD FUNCTION 3RD FUNCTION PORT B SOLENOID

E12 IMPLEMENT VALVE - LIFT LOWER ANTI-DRIFT SOLENOID

E13 IMPLEMENT VALVE - TILT DUMP ANTI-DRIFT SOLENOID

E14 QUICK COUPLER VALVE ENABLE SOLENOID

DB

C

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