992g Esq Hyd
2
RENR6324 24 Page, WDB © 2004 Caterpillar All Rights Reserved Printed in U.S.A. Hydraulic System AZX1-UP 992G Wheel Loader Hydraulic System RENR6324 May 2004 Hydraulic Symbols (Electrical) Electrical Symbols Table 325-AG135 PK-14 Circuit Identification Number Wire Color Wire Gauge Harness identification code This example indicates wire 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 Color Circuit Number Identification B A Wire Wire (EXAMPLE VALVE) Current Standard Transducer (Fluid) Transducer (Gas / Air) G Generator Electrical Wire Pressure Switch M Electric Motor Pressure Switch (Adjustable) Temperature Switch T Pressure Symbol Temperature Symbol Level Symbol Flow Symbol Electrical Symbols (Electrical) RIDE CONTROL Signal Pressure Tap (II) Machine Component Locations Tilt Cylinder Head End Pressure Tap (EE) Tilt Cylinder Rod End Pressure Port-no Tap (FF) Lift Cylinder Head End Pressure Tap (GG) Lift Cylinder Rod End Pressure Tap (HH) GG Ride Control Solenoid 976-OR 975-WH SECTION A-A A A Valve Gp Ride Control 9T-9552 Accumulator Gp Ride Control 219-7981 II CC JJ Fan Speed Solenoid 700-BU 799-BR BB AA Fan Drive Output Pressure Tap (JJ) Fan Drive Signal Pressure Tap (CC) Variable Disp(Torque Control) Pump Pressure Relief Tap (AA) Fixed Disp(Implement) Pump Pressure Relief Tap (BB) Implement Pilot pump Pressure Relief Tap (DD) DD EE HH FF Pilot Solenoid 717-BR 716-Wh Valve Gp - Implement Control 185-1439 Manifold 113-9502 Torque Control Variable Disp Pump Prop Solenoid 707-YL 716-WH TOP VIEW OF MACHINE RIGHT SIDE VIEW OF MACHINE TOP VIEW OF MACHINE Pump Gp - Implement Control 112-5381 Pump Gp - Fan Drive 186-2821 Pump Gp - Steering Pilot 136-3965 Pump Gp - Steering 216-4826 LEFT SIDE VIEW OF MACHINE TOP VIEW OF MACHINE Pump Gp - Brake 164-5486 TOP VIEW OF MACHINE Pump Gp Axle Oil Cooler 229-0659 Tap Locations Pressure, Sampling, and Sensor Tap Number Description Schematic Location AA Variable Disp Pump(Torque Control) Relief Port C-12 BB Fixed Disp Pump(Implement) Relief Port C-13 CC Fan Speed Pressure Port C-10 DD Implement Pilot Pressure Port C-12 EE Tilt Cylinder Head End Pressure Port F-12 FF Tilt Cylinder Rod End Pressure Port(no tap) F-12 GG Lift Cylinder Head End Pressure Port F-13 HH Lift Cylinder Rod End Pressure Port F-14 II Ride Control Signal Pressure Port D-11 JJ Fan Drive Output Pressure Port B-11 KK Steering Pilot Supply Port D-6 LL Steering Pump Discharge C-7 MM Steering Cylinder (Right) F-9 NN Steering Cylinder (Left) F-8 Pump Gp - Torque Control Variable Displacement 216-4825 Pump Gp - Implement Pilot 136-3965 Description Media Number 992G III Wheel Loader SEBP4013 Specifications: (Electrohydraulic System) SENR1366 Testing and Adjusting: (Electrohydraulic System) SENR1367 Specifications: (Steering System) SENR1348 Testing and Adjusting: (Steering System) SENR1373 Specifications: (Braking System) SENR1351 Testing and Adjusting: (Braking System) SENR1353 Schematic: (Electrical System) RENR6317 Related Manuals Parts Manual: Machine System: Electrical System: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 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 RESTRICTION VARIABLE 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 PEDAL GENERAL 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 CONDITIONER PUMP or MOTOR FLUID POWER SYMBOLS FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL VALVES PILOT CONTROL SYMBOLS RELEASED PRESSURE EXTERNAL RETURN INTERNAL RETURN REMOTE SUPPLY PRESSURE SIMPLIFIED COMPLETE INTERNAL SUPPLY PRESSURE ACCUMULATORS SPRING LOADED GAS CHARGED SOLENOID or MANUAL SOLENOID and PILOT SOLENOID and PILOT or MANUAL COMBINATION CONTROLS SOLENOID SERVO THERMAL DETENT HYDRAULIC AND PNEUMATIC CYLINDERS DOUBLE ACTING SINGLE ACTING BASIC SYMBOL SPRING LOADED CHECK VALVES TWO POSITION INFINITE POSITIONING FLOW IN ONE DIRECTION FLOW ALLOWED IN EITHER DIRECTION THREE POSITION CROSS FLOW PARALLEL FLOW INTERNAL PASSAGEWAYS NORMAL POSITION AB PT AB PT SHIFTED POSITION INFINITE POSITION CONTROL VALVES ATTACHMENT MANUAL SHUTOFF Description Part Number Machine Location Schematic Location Accumulator - Ride Control 219-7981 1 D-10 Accumulator - Brake Supply 220-2718 4 D-4 Brake Gp - Foot 112-2273 16 G-5 Brake Gp - Parking 8R-5518 16 G-3 Cooler 190-7624 8 C-11 Cooler - Steering Pilot Oil 190-7625 9 D-5 Cooler - Axle Oil Cooler 115-4831 8 A-2 Cylinder - Lift 162-1523 5 F-14 Cylinder - Lift 162-1522 5 F-12 Cylinder - Tilt 167-7996 6 F-13 Cylinder - Steer 112-8208 4 F-9 Cylinder - Steer 112-8208 4 F-8 Filter - Pilot Oil 115-2129 9 C-15 Filter - Case Drain 166-4647 8 C-11 Filter - Case Drain 166-4647 7 B-11 Filter - Case Drain 166-4647 7 B-13 Filter - Case Drain 166-4647 7 B-13 Filter - Case Drain 166-4647 4 C-6 Filter - Case Drain 166-4647 4 C-5 Filter - Steering Pilot Oil 115-2129 4 C-5 Filter - Rear Axle Oil 230-3633 17 B-3 Filter - Front Axle Oil 230-3633 17 C-3 Manifold 113-9502 10 C-12 Motor Gp - Fan Drive 159-7166 8 C-11 Pump Gp - Implement Pilot 138-3965 7 B-15 Pump Gp - Torque Control (Var Disp) 216-4825 7 B-14 Pump Gp - Implement 112-5381 7 B-13 Pump Gp - Fan Drive/Cooling 186-2821 7 B-11 Pump Gp - Steering 216-4826 4 C-7 Pump Gp - Steering Pilot 136-3965 4 B-5 Pump Gp - Brake Supply 164-5486 7 C-4 Pump Gp - Axle Oil Cooling 229-0659 8 C-2 Pump Gp - Secondary Steering 101-4007 4 D-6 Screen - Implement 174-4502 7 C-13 Screen - Implement 174-4502 7 C-13 Screen - Implement 174-4502 8 C-11 Screen - Implement 174-4502 8 C-11 Screen - Fan Drive Charge 196-4747 8 B-10 Screen - Implement 174-4502 4 C-7 Sensor Gp - Brake Pressure (VIMS only) 112-9779 16 E-3 Sensor Gp - Front Axle Oil Temp 100-3055 13 G-4 Switch - Pressure 117-7773 10 C-15 Switch - Pressure 117-7773 7 B-13 Switch - Pressure 117-7773 7 B-12 Switch - Pressure 117-7773 7 B-11 Switch - Pressure 117-7773 8 C-11 Switch - Pressure 117-7773 9 C-5 Switch - Pressure 117-7773 4 C-5 Switch - Pressure 117-7773 4 C-7 Switch - Brake Low Pressure 3E-7693 14 F-4 Switch - Brake Low Pressure 3E-7693 14 F-4 Switch - Parking Brake/Trans Override 3E-5181 14 G-3 Switch - Parking Brake Pressure 100-3055 14 G-2 Tank Gp - Implement Oil 139-2763 11 B-12 Tank Gp - Air Expansion 220-2771 4 B-8 Tank Gp - Steering and Brake 197-1401 12 B-6 Valve Gp - Implement Control 185-1439 3 F-15 Valve Gp - Manual Lower 112-1817 1 D-15 Valve Gp - Pump Torque Signal Solenoid 196-5862 15 D-15 Valve Gp - Relief 114-4672 10 C-15 Valve Gp - Cooler Bypass 6E-1454 8 C-11 Valve Gp - Cooler Drain 8T-6097 8 C-11 Valve Gp - Ride Control 9T-9552 1 D-11 Valve Gp - Ride Control Solenoid 152-8340 2 D-10 Valve Gp - Fan Speed 191-8735 7 B-10 Valve Gp - Steering Pilot 143-2855 4 C-9 Valve Gp - Steering Neutralizer Right Turn 146-7571 9 C-9 Valve Gp - Steering Neutralizer Left Turn 146-7571 9 C-8 Valve Gp - Check Steering Neutralizer 111-7775 9 D-9 Valve Gp - Steering Standard 126-1357 13 F-7 Valve Gp - Secondary Steering Selector 6E-3078 14 D-7 Valve Gp - Breaker Relief 220-0812 4 A-7 Valve Gp - Breaker Relief 133-1963 4 B-7 Valve Gp - Breaker Relief 133-1963 4 B-8 Valve Gp - Cooler Drain 8T-6097 4 E-6 Valve Gp - Relief 114-4672 4 D-5 Valve Gp - Check Rear Axle Oil 168-0360 17 B-3 Valve Gp - Check Front Axle Oil 168-0360 17 B-2 Component Locations
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Transcript of 992g Esq Hyd
RENR6324
24Page,WDB
©2004 Caterpillar
All Rights Reserved
Printed in U.S.A.
Hydraulic System
AZX1-UP
992G Wheel Loader
Hydraulic System
RENR6324
May 2004
Hydraulic Symbols (Electrical)
Electrical Symbols Table
325-AG135 PK-14
Circuit IdentificationNumber
Wire Color Wire Gauge
Harness identification code
This example indicates
wire 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
T
PressureSymbol
TemperatureSymbol
LevelSymbol
FlowSymbol
Electrical Symbols (Electrical)
RIDE CONTROL
Signal Pressure Tap (II)
Machine Component Locations
Tilt Cylinder Head End Pressure Tap (EE)Tilt Cylinder Rod End Pressure Port-no Tap (FF)Lift Cylinder Head End Pressure Tap (GG)Lift Cylinder Rod End Pressure Tap (HH)
GG
Ride Control
Solenoid
976-OR
975-WH
SECTION A-A
A
A
Valve GpRide Control9T-9552
Accumulator GpRide Control219-7981
II
CC
JJ
Fan Speed
Solenoid
700-BU
799-BR
BB
AA
Fan Drive Output Pressure Tap (JJ)Fan Drive Signal Pressure Tap (CC)Variable Disp(Torque Control) Pump Pressure Relief Tap (AA)Fixed Disp(Implement) Pump Pressure Relief Tap (BB)Implement Pilot pump Pressure Relief Tap (DD)
DD
EE
HH
FF
PilotSolenoid717-BR716-Wh
Valve Gp - Implement Control185-1439
Manifold113-9502
Torque ControlVariable Disp PumpProp Solenoid707-YL716-WH
TOP VIEW OF MACHINE
RIGHT SIDE VIEW OF MACHINE
TOP VIEW OF MACHINE
Pump Gp - Implement Control112-5381
Pump Gp - Fan Drive186-2821
Pump Gp - Steering Pilot136-3965
Pump Gp - Steering216-4826
LEFT SIDE VIEW OF MACHINE
TOP VIEW OF MACHINE
Pump Gp - Brake164-5486
TOP VIEW OF MACHINE
Pump GpAxle Oil Cooler229-0659
Tap Locations
Pressure, Sampling, and SensorTap
NumberDescription
Schematic
Location
AA Variable Disp Pump(Torque Control) Relief Port C-12
BB Fixed Disp Pump(Implement) Relief Port C-13
CC Fan Speed Pressure Port C-10
DD Implement Pilot Pressure Port C-12
EE Tilt Cylinder Head End Pressure Port F-12
FF Tilt Cylinder Rod End Pressure Port(no tap) F-12
GG Lift Cylinder Head End Pressure Port F-13
HH Lift Cylinder Rod End Pressure Port F-14
II Ride Control Signal Pressure Port D-11
JJ Fan Drive Output Pressure Port B-11
KK Steering Pilot Supply Port D-6
LL Steering Pump Discharge C-7
MM Steering Cylinder (Right) F-9
NN Steering Cylinder (Left) F-8
Pump Gp - Torque ControlVariable Displacement216-4825
Pump Gp - Implement Pilot136-3965
Description Media Number
992G III Wheel Loader SEBP4013
Specifications: (Electrohydraulic System) SENR1366
Testing and Adjusting: (Electrohydraulic System) SENR1367
Specifications: (Steering System) SENR1348
Testing and Adjusting: (Steering System) SENR1373
Specifications: (Braking System) SENR1351
Testing and Adjusting: (Braking System) SENR1353
Schematic: (Electrical System) RENR6317
Related Manuals
Parts Manual:
Machine System:
Electrical System:
1
2
3
4
5
6
78
9
1011
12
1314
15
16
17
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
FLUID POWER SYMBOLS
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLSRELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED COMPLETE INTERNAL
SUPPLY PRESSURE
ACCUMULATORS
SPRING LOADED GAS CHARGED
SOLENOID
or MANUALSOLENOID
and PILOT
SOLENOID and
PILOT 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 ONE
DIRECTION
FLOW ALLOWED IN
EITHER DIRECTION
THREE
POSITION
CROSS
FLOWPARALLEL
FLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
A B
P T
A B
P T
SHIFTED POSITION INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
DescriptionPart
Number
Machine
Location
Schematic
Location
Accumulator - Ride Control 219-7981 1 D-10
Accumulator - Brake Supply 220-2718 4 D-4
Brake Gp - Foot 112-2273 16 G-5
Brake Gp - Parking 8R-5518 16 G-3
Cooler 190-7624 8 C-11
Cooler - Steering Pilot Oil 190-7625 9 D-5
Cooler - Axle Oil Cooler 115-4831 8 A-2
Cylinder - Lift 162-1523 5 F-14
Cylinder - Lift 162-1522 5 F-12
Cylinder - Tilt 167-7996 6 F-13
Cylinder - Steer 112-8208 4 F-9
Cylinder - Steer 112-8208 4 F-8
Filter - Pilot Oil 115-2129 9 C-15
Filter - Case Drain 166-4647 8 C-11
Filter - Case Drain 166-4647 7 B-11
Filter - Case Drain 166-4647 7 B-13
Filter - Case Drain 166-4647 7 B-13
Filter - Case Drain 166-4647 4 C-6
Filter - Case Drain 166-4647 4 C-5
Filter - Steering Pilot Oil 115-2129 4 C-5
Filter - Rear Axle Oil 230-3633 17 B-3
Filter - Front Axle Oil 230-3633 17 C-3
Manifold 113-9502 10 C-12
Motor Gp - Fan Drive 159-7166 8 C-11
Pump Gp - Implement Pilot 138-3965 7 B-15
Pump Gp - Torque Control (Var Disp) 216-4825 7 B-14
Pump Gp - Implement 112-5381 7 B-13
Pump Gp - Fan Drive/Cooling 186-2821 7 B-11
Pump Gp - Steering 216-4826 4 C-7
Pump Gp - Steering Pilot 136-3965 4 B-5
Pump Gp - Brake Supply 164-5486 7 C-4
Pump Gp - Axle Oil Cooling 229-0659 8 C-2
Pump Gp - Secondary Steering 101-4007 4 D-6
Screen - Implement 174-4502 7 C-13
Screen - Implement 174-4502 7 C-13
Screen - Implement 174-4502 8 C-11
Screen - Implement 174-4502 8 C-11
Screen - Fan Drive Charge 196-4747 8 B-10
Screen - Implement 174-4502 4 C-7
Sensor Gp - Brake Pressure (VIMS only) 112-9779 16 E-3
Sensor Gp - Front Axle Oil Temp 100-3055 13 G-4
Switch - Pressure 117-7773 10 C-15
Switch - Pressure 117-7773 7 B-13
Switch - Pressure 117-7773 7 B-12
Switch - Pressure 117-7773 7 B-11
Switch - Pressure 117-7773 8 C-11
Switch - Pressure 117-7773 9 C-5
Switch - Pressure 117-7773 4 C-5
Switch - Pressure 117-7773 4 C-7
Switch - Brake Low Pressure 3E-7693 14 F-4
Switch - Brake Low Pressure 3E-7693 14 F-4
Switch - Parking Brake/Trans Override 3E-5181 14 G-3
Switch - Parking Brake Pressure 100-3055 14 G-2
Tank Gp - Implement Oil 139-2763 11 B-12
Tank Gp - Air Expansion 220-2771 4 B-8
Tank Gp - Steering and Brake 197-1401 12 B-6
Valve Gp - Implement Control 185-1439 3 F-15
Valve Gp - Manual Lower 112-1817 1 D-15
Valve Gp - Pump Torque Signal Solenoid 196-5862 15 D-15
Valve Gp - Relief 114-4672 10 C-15
Valve Gp - Cooler Bypass 6E-1454 8 C-11
Valve Gp - Cooler Drain 8T-6097 8 C-11
Valve Gp - Ride Control 9T-9552 1 D-11
Valve Gp - Ride Control Solenoid 152-8340 2 D-10
Valve Gp - Fan Speed 191-8735 7 B-10
Valve Gp - Steering Pilot 143-2855 4 C-9
Valve Gp - Steering Neutralizer Right
Turn146-7571 9 C-9
Valve Gp - Steering Neutralizer Left Turn 146-7571 9 C-8
Valve Gp - Check Steering Neutralizer 111-7775 9 D-9
Valve Gp - Steering Standard 126-1357 13 F-7
Valve Gp - Secondary Steering Selector 6E-3078 14 D-7
Valve Gp - Breaker Relief 220-0812 4 A-7
Valve Gp - Breaker Relief 133-1963 4 B-7
Valve Gp - Breaker Relief 133-1963 4 B-8
Valve Gp - Cooler Drain 8T-6097 4 E-6
Valve Gp - Relief 114-4672 4 D-5
Valve Gp - Check Rear Axle Oil 168-0360 17 B-3
Valve Gp - Check Front Axle Oil 168-0360 17 B-2
Component Locations
RENR6324
24Page,Color2,WDB
121314 12345678
A
B
C
D
E
G
F
9101112131415 345678 12
A
C
D
E
G
B
F
15 91011
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
Main Pump Output.
Pilot Pump Output.
Fan Drive Pump Output.
Steering Pump Output.
Steering Pilot Pump Output .
Brake Pump Output.
Supply Line
Drain/Return Line.
Torque Control Pump Output.
Steering Control Circuit.
Lift Cylinder Circuit.
Tilt Cylinder Circuit.
Brake Control System Circuit.
Axle Oil Cooling Pump Output.
Secondary Steering Pump Output.
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling,Sensor) by letter
Components by number
YY
52
VALVE GPPRESSUREREDUCING6E-4286
VALVE GPSTEERINGSTANDARD126-1357
VALVE GPRELIEFSTEERING CYLINDERCROSSOVER6E-3985
VALVE GPSHUTTLE4T-1860
HS
PS
FLUIDSAMPLINGPORT
RIGHT
TURN
STEERING
CYLINDERS
STEER
WARNING
SWITCH
VALVE GPIMPLEMENT CONTROL185-1439
VALVE GPSOLENOIDPILOT149-2610
VALVE GPSHUTTLEDEAD ENGINE148-2341
VALVE GPCOOLER BYPASS6E-1454
VALVE GPSOLENOIDPUMP TORQUESIGNAL196-5862
FLUIDSAMPLINGPORT
TILT
CYLINDER
HYDRAC
ON/OFF
E9L0WER
RAISE DUMP
RACKBACK
DUMP RAISE
L0WER
E6
E7
E5
E4
RACKBACK
FAN SPEED
TORQUE
LEVEL
E1
E3
E8
E12
E13E11
LIFT
CYLINDER
E14
LIFT
CYLINDER
SCREENFAN DRIVECHARGE196-4747
SENSOR GPPRESSUREFAN PUMP DISCHARGE167-1709
SENSOR GPPRESSUREIMPLEMENT143-9176
SWITCH GPPRESSURE117-7773
SWITCH GPPRESSURE117-7773
VALVE GPRELIEFTILT117-0160
VALVE GPRELIEFTILT117-0161
VALVE GPRELIEFLIFT129-8293
COOLER190-7624
VALVE GPRELIEFLIFT125-9349
VALVE GPCOOLER DRAIN8T-6097
FILTER GPPILOT115-2129
VALVE GPRELIEF114-4672
CYLINDER GPTILT167-7996
CYLINDER GPLIFT162-1523
PUMP GPFAN DRIVE& COOLING186-2821
VALVE GPFAN SPEED191-8735
TANK GPAIR EXPANSION220-2771
VALVE GPBREAKER RELIEF133-1963
FILTER GPCASE DRAIN166-4647
SCREEN GP174-4502
FILTER GPPUMP CASE DRAIN166-4647
SCREEN GP174-4502
ACCUMULATORBRAKE SUPPLY220-2718
PUMP GPBRAKE SUPPLY164-5486
VALVE GPRELIEF114-4672
VALVE GPSECONDARYSTEERINGSELECTOR6E-3078
VALVE GPCOOLER DRAIN8T-6907
FILTER GPSTEERING PILOT115-2129
COOLER GPSTEERING PILOT OIL190-7625
PUMP GPSTEERING PILOT136-3965
CYLINDER GPSTEERING112-8208
VALVE GPCHECKSTEERINGNEUTRALIZER111-7775
VALVE GPSTEERINGNEUTRALIZERLEFT TURN146-7571
VALVE GPSTEERING PILOT143-2855
PUMP GPSECONDARYSTEERING101-4007
VALVE GPSECONDARYSTEERINGRELIEF6E-3986
VALVE GPSECONDARYSTEERINGDIVERTER2U-7345
ACTUATOR GPSOLENOID180-9550
VALVE GPRELIEFSTEERING100-4335
AUTOLUBERETURN
AUTOLUBESUPPLY
VALVE GPSOLENOIDRIDE CONTROL152-8340
FILTER GPPUMP CASE DRAIN166-4647
AIR CONNECTION
TO IMPLEMENT TANK
ACCUMULATORRIDE CONTROL219-7981
FILTER GPCASE DRAIN166-4647
VALVE GPRIDE CONTROL9T-9552
VALVE GPMANUAL LOWER112-1817
PUMP GPTORQUE CONTROL216-4825
PUMP GPIMPLEMENT112-5381
MANIFOLD113-9502
MOTOR GPFAN DRIVE159-7166
STEMFLOAT FUNCTION100-6731
PUMP GPSTEERING216-4826
VALVE GPRELIEFIMPLEMENT PUMP117-0159VALVE GP
PRESSUREDEAD ENGINE6E-4286
VALVE GPRELIEFTORQUE PUMP143-8912
PUMP GPIMPLEMENT PILOT136-3965
TANK GPIMPLEMENTHYDRAULIC OIL139-2763
SCREENIMPLEMENT174-4502
HYDRAULIC SCHEMATICIMPLEMENT/FAN DRIVE
BRAKE SYSTEM SCHEMATIC
FILTER GPFRONT AXLE OIL230-3633
FILTER GPREAR AXLE OIL230-3633
TANK GPSTEERING & BRAKEHYDRAULIC OIL197-1401
SCREEN GP174-4502
VALVE GPSTEERINGNEUTRALIZERRIGHT TURN146-7571
CYLINDER GPSTEERING112-8208
SWITCH GPPRESSURE117-7773
SWITCH GPPRESSURE117-7773
ACTUATOR GPSOLENOID179-8248
CYLINDER GPLIFT162-1522
SCREENIMPLEMENT174-4502
SCREENIMPLEMENT174-4502
SWITCH GPPRESSURE117-7773
ACTUATOR GPSOLENOID180-9550
ACTUATOR GPSOLENOID179-8248
VALVE GPBREAKER RELIEF133-1963
VALVE GPBREAKER RELIEF220-0812
SWITCH GPPRESSURE117-7773
SWITCH GPPRESSURE117-7773
SWITCH GPPRESSURE117-7773
RIDE CONTROL
VALVE GPSECONDARY STEERINGATTACHMENT112-4597
VARIABLE DISP PUMPRELIEF PRESSURETAP
FIXED DISP PUMPRELIEF PRESSURETAP
IMPLEMENTPILOT PRESSURETAP
THIS SCHEMATIC IS FOR THE 992G WHEEL LOADERPart #: 230-1471 CHG 00Part #: 229-3722 CHG 00 (Axle Oil Cooling System Schematic)Part #: 138-4558 CHG 04 (Brake Control System Schematic)
PUMP GPAXLE OIL COOLING229-0659
VALVE GPCHECKFRONT AXLE OIL168-0360
VALVE GPCHECKREAR AXLE OIL168-0360
COOLER GP2 SECTIONAXLE OIL115-4831
REAR AXLE
FRONT AXLE
AXLE OIL COOLINGSYSTEM SCHEMATIC
REAR AXLE
FRONT AXLE
PARKING BRAKE TRANSMISSION
INTERLOCK OVERRIDE SW
STOPLAMP SW THROTTLE LOCK DISCONNECT SW
IMPELLER CLUTCH PEDALPOSITION SIGNAL
(TO TRANSMISSION CONTROL)
SENSORFRONT AXLE OILTEMPERATURE100-3055
SWITCH GPPARKING BRAKEPRESSURE100-3055
SWITCH GPBRAKE LOWPRESSURE WARN3E-7693
VALVE GPTANDEM BRAKE129-7673
CONTROL GPFOOT BRAKE112-2273
BRAKE GPPARKING8R-5518
SENSOR GPBRAKE PRESSURE(VIMS ONLY)112-9779
VALVE GPBRAKE100-8941
VALVE GPCHECKPARKING BRAKERETURN OIL6E-5444
SWITCH ASPARKING BRAKE/XMSN INTERLOCKOVERIDE3E-5181
HYDRAULIC SCHEMATICSTEERING/BRAKE SUPPLY
SENSORREAR AXLE OILTEMPERATURE100-3055
FAN SPEEDPRESSURE TAP
FAN DRIVEOUTPUT PRESSURETAP
RIDE CONTROLSIGNALPRESSURE TAP
TILT CYLHEAD ENDPRESSURE TAP
TILT CYLROD ENDPRESSURE PORT(NO TAP)
LIFT CYLROD ENDPRESSURE TAP
LIFT CYLHEAD ENDPRESSURE TAP
STEERING PUMPDISCHARGEPRESSURE TAP
STEERING PILOTSUPPLY TAP
RIGHT STEERINGCYLINDER PRESSURETAP
LEFT STEERINGCYLINDER PRESSURETAP
Components are shown installed on a fully operable machine with the key and engineoff and transmission shifter in neutral.
BRAKERETURNLINE
REARBRAKESUPPLY
FRONTBRAKESUPPLY
BRAKERETURNLINE
REARBRAKESUPPLY
FRONTBRAKESUPPLY
AIR CONNECTION
TO IMPLEMENT TANK
HH GG EE FF
BBAA
DD
II
CC
LL
KK
JJ
MM NN
