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INTERACTIVE SCHEMATIC

The Bookmarks panel will allow you to

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Click on any text that is BLUE and underlined.

These are hyperlinks that can be used to navi-

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button will make all of the callouts visible. This button is

located in the top right corner of every machine view page.VIEW ALL CALLOUTS

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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Hydraulic System

994H Wheel Loader

DWC1-UP

2015 Caterpillar, All Rights Reserved Printed in U.S.A

UENR1278-0April 201

Volume 1 of 2: Steering and Brake Circuits

Volume 1 of 2: Implement System

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Volume 1 of 2 - STEERING AND

BRAKE CIRCUITS

Page 1 of 2

COMPONENT LOCATIONS

Description

Part

Number

Machine

Location

Schematic

Location

Accumulator GP - Brake 348-9290 1 E-4

Brake GP - Parking 116-1339 2 J-3

Breather - Hydraulic (Brake Cooling Tank) 9T-1119 3 B-4

Breather - Hydraulic (Steering and Brake Tank) 9T-1119 4 C-7

Connector 143-4218 5 B-13

Connector 8C-0564 6 G-12

Control GP - Foot Brake 305-5531 7 I-6

Cooler - Brake 9Y-8890 8 C-3

Core GP - Oil Cooler 186-0059 9 F-7

Cylinder GP - Steering (LH) 6E-0529 10 I-14

Cylinder GP - Steering (RH) 9T-9019 11 I-13

Filter GP - Oil 6E-0874 12 F-7

Filter GP - Oil (Hydraulic Case Drain LH) 115-2129 13 B-10

Filter GP - Oil (Hydraulic Case Drain RH) 115-2129 14 B-11

Fitting - Orifice 110-0778 15 B-13

Pump GP - Brake 102-4226 16 C-5

Pump GP - Brake Cooling 116-7341 17 B-3

Pump GP - Secondary Steering 6E-0868 18 G-9

Pump GP - Steering (LH) 263-5065 19 D-10

Pump GP - Steering (RH) 263-5064 20 C-11

Pump GP - Steering and Brake Oil Cooler 6E-0867 21 D-6

Screen - Front Left 164-3306 22 E-3

Screen - Front Right 164-3306 23 E-2

Screen - Rear Left 164-3306 24 D-3

Screen - Rear Right 164-3306 25 D-2

Screen AS - Return 7J-2656 26 B-7

Screen AS - Return 9T-9227 27 B-8

Screen GP - Steering Pump LH 251-2451 28 F-10

Screen GP - Steering Pump RH 251-2451 29 E-11

Screw - Purge (Steering Cylinder LH) 9F-2167 30 H-13

Screw - Purge (Steering Cylinder RH) 9F-2167 31 H-13

Sensor GP - Temperature (Brake Cooling Oil) 288-8390 32 B-3

Sensor GP - Temperature (Front Axle Oil) 288-8390 33 J-5

Sensor GP - Temperature (Rear Axle Oil) 288-8390 34 G-5

Sensor GP - Temperature (Steering and Brake Oil) 288-8390 35 B-9

Switch - Oil Level (Brake Cooling) 306-6875 36 B-5

Switch - Oil Level (Steering and Brake) 306-6875 37 B-6

Switch As - Limit (Park Brake) 171-7085 38 I-3

Switch AS - Pressure 255-2282 39 F-6

Switch As - Pressure (Brake) 175-3244 40 H-4

Switch As - Pressure (Park Brake Oil) 327-4608 41 J-2

Switch AS - Pressure (Oil Filter Bypass LH) 339-4361 42 B-10

Switch AS - Pressure (Oil Filter Bypass RH) 339-4361 43 B-11

Switch AS - Pressure (Secondary Steering Pump) 313-5104 44 B-13

Tank GP - Hydraulic (Brake Cooling) 248-2584 45 A-4

Tank GP - Hydraulic (Steering and Brake) 307-4606 46 B-7

Valve GP - Brake Control (Parking) 106-1774 47 I-2

Valve GP - Brake Control (Service) 247-1295 48 I-5

Valve GP - Check 122-3359 49 C-4

Valve GP - Check (Brake Accumlator) 128-6847 50 E-5

Check Part Numbers in the Parts Manuals for your Specific Machine.

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Volume 1 of 2 - STEERING AND

BRAKE CIRCUITS

Page 2 of 2

COMPONENT LOCATIONS

Description Part

Number

Machine

Location

Schemat

Location

Valve GP - Check (Brake Pump) 9T-6005 51 D-5

Valve GP - Check (Front Left) 9T-3752 52 E-3

Valve GP - Check (Front Right) 9T-3752 53 E-2

Valve GP - Check (Neutralizer, Steering) 149-4617 54 F-13

Valve GP - Check (Rear Left) 9T-3752 55 C-3

Valve GP - Check (Rear Right) 9T-3752 56 C-2

Valve GP - Check (Steering Pump LH) 6E-1252 57 E-10

Valve GP - Check (Steering Pump RH) 6E-1252 58 D-11

Valve GP - Cooler Bypass 264-6867 59 F-6

Valve GP - Diverter (Secondary Steering) 163-5465 60 G-10

Valve GP - Flow Compensator (Steering Pump LH) 6E-1024 61 E-9

Valve GP - Flow Compensator (Steering Pump RH) 6E-1024 62 D-12

Valve GP - Fluid Sampling 8C-3446 63 E-6

Valve GP - Pilot (Stic Steering) 249-5615 64 C-13

Valve GP - Pressure Control (Secondary Steering) 1U-2226 65 B-12Valve GP - Pressure Control (Steering) 1U-2226 66 B-13

Valve GP - Relief (Direct Operated) 367-5058 67 D-5

Valve GP - Relief (Pump Backup) 9J-8225 68 G-12

Valve GP - Relief (Steering Cylinder Crossover) 6E-0859 69 G-14

Valve GP - Relief (Secondary Steering) 9J-0460 70 G-10

Valve GP - Shuttle 4T-1860 71 G-13

Valve GP - Steering 154-5236 72 G-13

Valve GP - Steering Neutralizer (LH) 296-5662 73 E-13Valve GP - Steering Neutralizer (RH) 296-5662 74 E-14

Wheel GP - Final Drive and Brake (Front Left) 137-3505 75 E-3

Wheel GP - Final Drive and Brake (Front Right) 137-3505 76 E-2

Wheel GP - Final Drive and Brake (Rear Left) 137-3505 77 D-3

Wheel GP - Final Drive and Brake (Rear Right) 137-3505 78 D-2

Check Part Numbers in the Parts Manuals for your Specific Machine.

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Volume 2 of 2 - IMPLEMENT SYSTEM

Page 1 of 2

COMPONENT LOCATIONS

DescriptionPart

Number

Schematic

Location

Machine

Location

Accumulator GP - Pilot 245-2975 F-12 80

Actuator GP - Pilot Control (Dump, Operator Left Valve, Left Tilt Cylinder) 217-6720 G-9 81Actuator GP - Pilot Control (Dump, Operator Right Valve, Right Tilt Cylinder) 217-6720 H-6 82

Actuator GP - Pilot Control (Lower, Operator Left Valve, Left Lift Cylinder) 217-6720 H-10 83

Actuator GP - Pilot Control (Lower, Operator Right Valve, Right Lift Cylinder) 217-6720 H-5 84

Actuator GP - Pilot Control (Rack, Operator Left Valve, Left Tilt Cylinder) 217-6720 H-9 85

Actuator GP - Pilot Control (Rack, Operator Right Valve, Right Tilt Cylinder) 217-6720 I-6 86

Actuator GP - Pilot Control (Raise, Operator Left Valve, Left Lift Cylinder) 217-6720 G-10 87

Actuator GP - Pilot Control (Raise, Operator Right Valve, Right Lift Cylinder) 217-6720 H-5 88

Connector AS 222-6869 E-12 89

Connector AS - Left Lift Cylinder Head End 8I-6347 J-10 90

Connector AS - Left Lift Cylinder Rod End 8I-6347 J-10 91

Connector AS - Operator Left Valve 8I-6347 H-9 92

Connector AS - Operator Right Valve 8I-6347 H-7 93

Cooler GP - Brake 179-3642 C-12 94

Cylinder GP - Lift Left (Extended High Lift) 322-1579 J-10 95

Cylinder GP - Lift Left (High Lift) 288-4468 J-10 96

Cylinder GP - Lift Left (Standard Lift) 193-4076 J-10 97

Cylinder GP - Lift Left (Super High Lift) 247-4565 J-10 98

Cylinder GP - Lift Right (Extended High Lift) 322-1579 J-5 99

Cylinder GP - Lift Right (High Lift) 288-4468 J-5 100

Cylinder GP - Lift Right (Standard Lift) 193-4076 J-5 101

Cylinder GP - Lift Right (Super High Lift) 247-4565 J-5 102

Cylinder GP - Tilt Left (Extended High Lift) 322-3142 J-9 103

Cylinder GP - Tilt Left (High Lift) 341-6034 J-9 104

Cylinder GP - Tilt Left (Standard Lift) 353-3913 J-9 105

Cylinder GP - Tilt Left (Super High Lift) 353-4654 J-9 106

Cylinder GP - Tilt Right (Extended High Lift) 322-3141 J-6 107

Cylinder GP - Tilt Right (High Lift) 341-6033 J-6 108

Cylinder GP - Tilt Right (Standard Lift) 353-3912 J-6 109

Cylinder GP - Tilt Right (Super High Lift) 353-4653 J-6 110

Filter GP - Cooler 6E-0874 C-12 111

Filter GP - Hydraulic Case Drain 1 115-2129 C-9 112Filter GP - Hydraulic Case Drain 2 115-2129 C-8 113

Filter GP - Oil 1 341-1861 B-9 114

Filter GP - Oil 2 341-1861 B-7 115

Filter GP - Hydraulic Oil 353-0454 E-12 116

Fitting - Quick Disconnect (Operator Center) 6V-3965 C-9 117

Fitting - Quick Disconnect (Operator Left) 1 6V-3965 C-6 118

Fitting - Quick Disconnect (Operator Left) 2 6V-3965 C-6 190

Fitting - Quick Disconnect (Operator Right) 6V-3965 C-10 119

Gauge - Sight (Oil) 147-9560 A-9 120

Pump GP - Implement (Operator Center) 315-3144 E-8 121

Pump GP - Implement (Operator Right) 325-9799 E-10 122

Pump GP - Implement (Operator Left) 330-9389 E-7 123

Pump GP - Pilot System Hydraulic Oil Cooler 245-0963 D-12 124

Screen AS 9T-9227 A-10 125

Screen AS - Operator Center 6E-5065 C-8 126

Screen AS - Operator Right 6E-5065 C-10 127

Screen GP 7J-2656 A-11 128

Screen GP - Implement (Operator Center) 251-2451 E-8 129

Screen GP - Implement (Operator Left) 1 251-2451 D-6 130

Screen GP - Implement (Operator Left) 2 251-2451 C-6 131

Screen GP - Implement (Operator Right) 251-2451 E-10 132

Screw - Purge (Left Tilt Cylinder Head End) 9F-2167 I-9 133

Screw - Purge (Left Tilt Cylinder Rod End) 9F-2167 J-9 134

Sensor - Oil Level 306-6875 A-9 135

Sensor AS - Temperature (Hydraulic Oil) 256-6453 A-12 136

Sensor GP - Pressure (Implement Pilot) 349-1178 E-12 137

Sensor GP - Pressure (Left Lift Cylinder Head End) 349-1178 J-10 138

Sensor GP - Pressure (Left Lift Cylinder Rod End) 349-1178 J-10 139

Sensor GP - Pressure (Operator Left Valve) 344-7391 H-9 140

Sensor GP - Pressure (Operator Right Valve) 344-7391 H-7 141

Check Part Numbers in the Parts Manuals for your Specific Machine.

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Volume 2 of 2 - IMPLEMENT SYSTEM

Page 2 of 2

COMPONENT LOCATIONS

DescriptionPart

Number

Schematic

Location

Machine

Location

Switch AS - Pressure (Filter Bypass) 349-6097 E-12 142

Switch AS - Pressure (Oil Filter Bypass) 1 339-4361 C-9 143

Switch AS - Pressure (Oil Filter Bypass) 2 339-4361 B-9 144

Switch AS - Pressure (Oil Filter Bypass) 3 339-4361 C-8 145

Switch AS - Pressure (Oil Filter Bypass) 4 339-4361 B-7 146

Switch GP - Pressure (Cooler Filter Bypass) 255-2282 C-12 147

Tank - Expansion (LH) 321-7838 A-8 148

Tank - Expansion (RH) 321-7838 A-9 149

Tank GP - Hydraulic 336-6665 A-11 150

Tube AS 322-1673 G-5 151

Tube AS 322-1674 F-10 191

Valve - Float Check, Operator Left Valve 6E-1291 G-10 152

Valve - Operator Left Valve 1 (Load Check) 102-4156 H-9 153Valve - Operator Left Valve 2 (Load Check) 102-4156 H-10 154

Valve - Float Check, Operator Right Valve 6E-1291 G-6 155

Valve - Operator Right Valve 1 (Load Check) 102-4156 H-6 156

Valve - Operator Right Valve 2 (Load Check) 102-4156 H-6 157

Valve GP - Breaker Relief 133-1963 A-6 158

Valve GP - Breaker Relief (LH) 220-0812 A-7 159

Valve GP - Breaker Relief (RH) 220-0812 A-8 160

Valve GP - Check 239-1132 G-11 161

Valve GP - Check 4T-5896 I-11 162

Valve GP - Check and Relief (Operator Center) 275-4098 D-7 163

Valve GP - Check and Relief (Operator Left) 1 275-4098 D-5 164

Valve GP - Check and Relief (Operator Left) 2 275-4098 C-5 165

Valve GP - Check and Relief (Operator Right) 275-4098 D-9 166Valve GP - Control (Operator Left Valve) 326-7714 I-11 167

Valve GP - Control (Operator Right Valve) 326-7715 I-5 168

Valve GP - Cooler Bypass (Hydraulic Oil) 264-6867 C-12 169

Valve GP - Fluid Sampling 8C-3446 D-12 170

Valve GP - Makeup (Right Lift Cylinder Rod End) 160-7439 I-5 171

Valve GP - Manual Lower 112-1817 H-11 172

Valve GP - Pressure Reducing 370-0438 I-11 173

Valve GP - Relief (Hydraulic Oil Cooler Bypass) 245-4891 C-11 174

Valve GP - Relief (Left Lift Cylinder Head End) 352-2906 I-10 175

Valve GP - Relief (Left Tilt Cylinder Head End) 129-8293 I-9 176

Valve GP - Relief (Left Tilt Cylinder Rod End) 352-2907 I-9 177

Valve GP - Relief (Operator Left) 1 143-8912 D-6 178

Valve GP - Relief (Operator Left) 2 143-8912 C-6 179

Valve GP - Relief (Right Lift Cylinder Head End) 352-2906 I-5 180

Valve GP - Relief (Right Tilt Cylinder Head End) 129-8293 I-6 181

Valve GP - Relief (Right Tilt Cylinder Rod End) 352-2907 I-6 182

Valve GP - Relief (Operator Center) 143-8912 D-8 183

Valve GP - Relief (Operator Right) 143-8912 D-9 184

Valve GP - Sequence 336-4809 E-12 185

Valve GP - Shuttle 4T-1860 I-10 186

Valve GP - Solenoid 151-7455 G-11 187

Valve GP - Solenoid (Load Sensing Operator Left Valve) 173-7455 F-10 188

Valve GP - Solenoid (Load Sensing Operator Right Valve) 173-7455 G-6 189

Check Part Numbers in the Parts Manuals for your Specific Machine.

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Volume 1 of 2 - STEERING AND

BRAKE CIRCUITS

TAP LOCATION

Tap

Number

Description Schematic

LocationA Accumulator Pressure H-3

B Service Brake Pressure H-4

C Service Brake Pressure (Front) I-5

D Service Brake Pressure (Rear) G-5

G1 Steering Cylinder Pressure (Left) H-14

G2 Steering Cylinder Pressure (Right) H-13G3 Left Steering Pump Discharge Pressure E-12

G4 Right Steering Pump Discharge Pressure F-10

G5 Brake Cooling Pump Discharge Pressure B-3

G6 Cooler Pump Discharge Pressure E-6

G7 Front Brake Accumulator Pressure E-4

G8 Rear Brake Accumulator Pressure D-5

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Volume 2 of 2 - IMPLEMENT SYSTEM

TAP LOCATION

Tap

NumberDescription

Schematic

Location

G1 Right Implement Pump Discharge Pressure E-9

G2 Center Implement Pump Discharge Pressure E-8

G3 Left Rear Implement Pump Discharge Pressure D-6

G4 Left Front Implement Pump Discharge Pressure D-6

G5 Implement Pilot Pressure E-12

G6 Lift Rod End Cylinder Pressure I-10

G7 Lift Head End Cylinder Pressure I-10

G8 Tilt Rod End Cylinder Pressure J-9

G9 Tilt Head End Cylinder Pressure J-10

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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

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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

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Componentsareshowninstal ledona fully operablemachinewith thekey andengineoff, inneutraland withparkingbrake set.

Refertothe appropriateServiceManual forTroubleshooting, Specifications andSystems

Refertothe Parts Manualusingaspecific serialnumberprefix inSIS beforeorderingpar

VOLUME 1of2: STEERING ANDBRAKE CIRCUITS

SCHEMATICPART NUMBER: 327-5451, CHANGE: 01, VERSIO

MEDIA NUMBER: UENR1278-07

THIS SCHEMATICIS FORTHE 994H WHEEL LOADERHYDR

SCHEMATICPART NUMBER: 248-2712, CHANGE: 03, VERSIO

A

B

C

D

E

F

1234567891011121314

G

H

I

J

1234567891011121314

LINE PATTERNS

Drain/ Return

Component G

AirLine

Pilot / LoadSe

PressureLine

CALLOUTS

Taps (Pressure, SaYY

(52)VALVE GP-CON

138-1234

Callout Number(MachineLocationfrom

Component LocationsTable)Part Num

HYDRAULICCIRCUIT COLORDES

BRAKE COOLING CIRCUIT

STEERING PUMP OUTPUT

STEERING ANDBRAKE OILCO

SECONDARY PUMP OUTPUT

STEERING CIRCUIT

SUPPLY LINEBRAKE CIRCUIT

DRAIN/ RETURNLINE

BRAKE PUMP OUTPUT

PARK BRAKE CIRCUIT

ELECTRICALCIRCUITS

BRAKE RETURN

FRONT BRAKE SUPPLY

REARBRAKE SUPPLY

PS

HS

PS

HS

(76)WHEELGP

FINALDRIVE ANDBRAKE (FRONTRIGHT)

137-3505

(1)ACCUMULATORGP

BRAKE348-9290

(2)BRAKE GP

PARKING

367-8636

(4)BREATHERHYDRAULIC

(STEERING AND

BRAKE TANK)

9T-1119

(7)CONTROLGP

FOOTBRAKE

305-5531

(3)BREATHER

HYDRAULIC

(BRAKECOOLING TANK)

9T-1119

(8)COOLERBRAKE

9Y-8890

(9)CORE GP

OILCOOLER

186-0059

(12)FILTERGP

OIL

6E-0874

(14)FILTERGP

OIL(HYDRAULICCASE DRAINRH)

115-2129

(74)VALVE GP

STEERING

NEUTRALIZER(RH)

296-5662

(6)CONNECTOR

8C-0564

(15)FITTING

ORIFICE110-0778

(5)CONNECTOR

143-4218

(29)SCREENGPSTEERING PUMPRH

251-2451

(28)SCREENGP

STEERING PUMPLH251-2451

(22)SCREEN

FRONTLEFT

164-3306

(26)SCREENAS

RETURN

7J-2656

(27)SCREENAS

RETURN9T-9227

(31)SCREW

PURGE

(STEERING CYLINDERRH)

9F-2167

(30)SCREWPURGE

(STEERING CYLINDERLH)

9F-2167

(11)CYLINDERGPSTEERING (RH)

9T-9019

(10)CYLINDERGPSTEERING (LH)

6E-0529

(35)SENSORGP

TEMPERATURE(STEERING ANDBRAKE OIL)

288-8390

(34)SENSORGPTEMPERATURE

(REARAXLE OIL)288-8390

(33)SENSORGPTEMPERATURE

(FRONTAXLE OIL)

288-8390

(16)PUMPGP

BRAKE

102-4226

(17)PUMPGP

BRAKE COOLING

116-7341

(21)PUMPGP

STEERING ANDBRAKE

OILCOOLER

6E-0867

(18)PUMPGP

SECONDARYSTEERING

6E-0868

(19)PUMPGP

STEERING (LH)

263-5065

(20)PUMPGP

STEERING (RH)

263-5064

(46)TANK GPHYDRAULIC

(STEERING ANDBRAKE)

307-4606

(45)TANK GPHYDRAULIC

(BRAKE COOLING)

248-2584

(44)SWITCH AS

PRESSURE

(SECONDARY

STEERING PUMP)313-5104

(37)SWITCH

OILLEVEL(STEERING ANDBRAKE)

306-6875

(36)SWITCHOILLEVEL

(BRAKE COOLING)

306-6875

(32)SENSORGP

TEMPERATURE

(BRAKE COOLING OIL)

288-8390

(39)SWITCHASPRESSURE

255-2282

(43)SWITCH AS

PRESSURE

(OILFILTERBYPASS RH)

339-4361

(38)SWITCHAS

LIMIT

(PARK BRAKE)

171-7085(40)SWITCHAS

PRESSURE

(BRAKE)

175-3244

(41)SWITCHAS

PRESSURE

(PARK BRAKE OIL)

327-4608

(47)VALVE GP

BRAKE CONTROL(PARKING)

106-1774

(58)VALVE GP

CHECK

(STEERING PUMPRH)

6E-1252

(54)VALVE GP

CHECK(NEUTRALIZER, STEERING)

149-4617

(59)VALVE GP

COOLERBYPASS

264-6867

(50)VALVE GP

CHECK(BRAKE ACCUMULATOR)

128-6847

(49)VALVE GPCHECK

122-3359

(52)VALVE GP

CHECK (FRONTLEFT)9T-3752

(51)VALVE GP

CHECK(BRAKE PUMP)

9T-6005

(62)VALVE GP

FLOW

COMPENSATOR(STEERING PUMPRH)

6E-1024

(61)VALVE GP

FLOWCOMPENSATOR

(STEERING PUMPLH)

6E-1024

(64)VALVE GP

PILOT

(STICSTEERING)

249-5615

(60)VALVE GP

DIVERTER

(SECONDARYSTEERING)

163-5465

(65)VALVE GPPRESSURE CONTROL

(SECONDARYSTEERING)

1U-2226

(66)VALVE GPPRESSURE

CONTROL

(STEERING)

1U-2226

(70)VALVE GPRELIEF

(SECONDARYSTEERING)

9J-0460

(68)VALVE GP

RELIEF

(PUMPBACKUP)

9J-8225

(67)VALVE GP

RELIEF(DIRECTOPERATED)

367-5058

(69)VALVE GPRELIEF

(STEERING CYLINDER

CROSSOVER)

6E-0859

(63)VALVE GP

FLUIDSAMPLING

8C-3446

(71)VALVE GP

SHUTTLE

4T-1860

(72)VALVE GP

STEERING154-5236

(48)VALVE GP

BRAKE CONTROL

(SERVICE)247-1295

(57)VALVE GP

CHECK(STEERING PUMPLH)

6E-1252

REARAXLE

FRONT AXLE

G1 G2

(73)VALVE GP

STEERING

NEUTRALIZER(LH)

296-5662

G3

(13)FILTER

OIL(HYDRAULICCASE DRAINLH)

115-2129

(42)SWITCH AS

PRESSURE

(OILFILTERBYPASS LH)

339-4361

G4

C

G6

G5

D

B

A

G8

G7

(53)VALVE GP

CHECK (FRONTRIGHT)9T-3752

(23)SCREEN

FRONTRIGHT

164-3306

(75)WHEELGP

FINALDRIVE ANDBRAKE (FRONTLEFT)

137-3505

(78)WHEELGP

FINALDRIVE ANDBRAKE (REARRIGH137-3505

(77)WHEELGP

FINALDRIVE ANDBRAKE (REARLEFT

137-3505

(24)SCREEN

REARLEFT

164-3306(25)SCREEN

REARRIGHT

164-3306

(55)VALVE GPCHECK (REARLEFT)

9T-3752

(56)VALVE GPCHECK (REARRIGHT)

9T-3752

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BRAKE AND STEERING OIL COOLER CIRCUIT

63

59

39

21

12

9

VIEW ALL CALLO

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BRAKE COOLER - REAR FRAME END

8

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FRONT FRAME AND AXLE - LEFT SIDE VIEW

75 52 3322 2

VIEW ALL CALLO

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FRONT FRAME AND AXLE - RIGHT SIDE VIEW

7653 23

VIEW ALL CALLO

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REAR AXLE

78

77

56

55

49

34

25

24

17

VIEW ALL CALLO

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REAR FRAME - BRAKE COOLING TANK AND BRAKE

ACCUMULATORS

A

B

VIEW OF AREA A (ACCUMULATORS REMO

VIEW OF AREA B (STEERING PUMP REMO

A

B67

51

5

45

3632

16

3

1

VIEW ALL CALL

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REAR FRAME - FRONT

A

B

VIEW OF AREA A

VIEW OF AREA B

A

B

B

A

48

41

40

7

VIEW ALL CALL

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REAR FRAME - FRONT

COMPONENT

NOT SHOWN

VIEW OF AREA AVIEW OF AREA B

VIEW OF AREA C

COMPONENT

INSIDE VALVE

CC

BB

AA

G2

G1

74

7372

71

70

69

68

66

65

64

60

54

44

31

30

18

15

11

10

5VIEW ALL CA

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STEERING AND BRAKE HYDRAULIC TANK

AND STEERING PUMPS

COMPONENTS

INSIDE TANK

BEHIND AND BELOW

TANK

62 61

58

57

46

43

42

37

35

29 28

2726

20

19

14

13

6

4

VIEW ALL CALLO

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TAPS

A VIEW OF AREA AA

G8G

G6

G5 G

G

D

VIEW ALL CALL

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FRONT FRAME - REAR LEFT VIEW

CC

VIEW OF AREA C

127

184

183

182

179

178

171

168

166

165164

163

160

158

157

156

154

153

152

149

141

132

131

130

129

126

123 122121

93

88

82

VIEW ALL CA

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FRONT FRAME - REAR RIGHT VIEW

A

B

A

VIEW OF AREA A

VIEW OF AREA B

B

190187

186

185

177

76

175 173

172

170

167

162

161

159

152

148

146

145

144

143

142

140

139

138

137

134

133

120

119118

117

116

115

114

1

112

92

89

87

85

83

81

80

VIEW ALL C

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HYDRAULIC OIL COOLER COMPONENTS

AND LOAD SENSING VALVES

189

188

174124

VIEW ALL CALLO

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HYDRAULIC TANK

191

151

150

136

135

128

125

VIEW ALL CALLO

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LIFT AND TILT CYLINDERS

110 109108 107106

105

104

103

102

101

100

99

98

97

96

95

91

90

VIEW ALL CALLO

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OIL COOLING

169

147

111

94

VIEW ALL CALL

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TAP LOCATIONS

G9

G8

G7

G6

G5

G4

G3

G2

G1

VIEW ALL CALLO