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RE
NR
36
80
-01
VO
L1
16
Pa
ge
Volume 1 - with Ripper
RENR3680-01August 2005
D8R Track-Type TractorHydraulic SystemAKA1-UP6YZ1-UP
© 2005 CaterpillarAll Rights Reserved
Printed in U.S.A.
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
PRESSURECOMPENSATION
PUMP: VARIABLE andPRESSURE COMPENSATED
ENERGY TRIANGLESHYDRAULIC PNEUMATIC
MEASUREMENT
PRESSURE TEMPERATURE FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FIXEDDISPLACEMENT
VARIABLE DISPLACEMENTNON-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
FIXEDDISPLACEMENT
VARIABLE DISPLACEMENTNON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLSRELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE
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
BASICSYMBOL
SPRINGLOADED
CHECK VALVES
TWOPOSITION
INFINITEPOSITIONING
FLOW IN ONEDIRECTION
FLOW ALLOWED INEITHER DIRECTION
THREEPOSITION
CROSSFLOW
PARALLELFLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
A B
P T
A B
P TSHIFTED POSITION INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOTCONTROLLED
Hydraulic Symbols (Electrical)
Electrical Symbols Table
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 NumberIdentification
Wire Number Identification Codes
Current Standard
Previous Standard
Electrical Schematic Example Hydraulic Schematic Example
325-PK
Wire ColorCircuit NumberIdentification
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)
ItemNumber Description Part
NumberSchematicLocation
1 Pump Gp - Steering / Cooling 139-4151 F-42 Motor Gp - Steering 159-7162 F-73 Pump Gp - Implement 9T-8346 D-3
5 Manifold Gp - Inlet & Relief 163-0829 D-56 Valve Gp - Dozer Lift Section 160-5953 D-57 Valve Gp - Tilt Section 160-5954 C-58 Valve Gp - Ripper Lift & Tilt Sections 169-3323 B-510 Cover - End 169-9119 A-511 Valve Gp - Dozer Pilot Control 200-0189 A-312 Valve Gp - Ripper Pilot Control 184-5321 A-814 Valve Gp - Implement Lockout 130-4531 B-815 Accumulator - Pilot Circuit 200-0750 C-816 Valve Gp - Pressure Reg Manifold 162-0162 C-817 Valve Gp - Cooler Bypass 126-0747 E-318 Cooler - Hydraulic Oil 153-1271 D-219 Filter Gp - Steering Charge 177-6979 F-320 Valve Gp - Steering Pilot 9T-8693 E-321 Valve Gp - Pressure Control 163-0057 E-722 Valve Gp - Quick Drop 109-6942 D-223 Cylinder Gp - Lift 6E-1102 D-124 Cylinder Gp - Dual Tilt 6E-0397 C-125 Cylinder Gp - Single Tilt 6E-1175 B-126 Cylinder Gp - Ripper Tip (LH) 155-3652 D-827 Cylinder Gp - Ripper Tip (RH) 165-0102 D-828 Cylinder Gp - Ripper Lift 155-3653 D-729 Cylinder Gp - Pin Puller 6E-3113 D-730 Tank Gp - Hydraulic Oil 164-3700 C-332 Valve Gp - Dual Tilt 106-9648 C-1
Component Locations (Volume 1)
4 Valve Gp - Dozer & Ripper ImpDozer Only
160-5951160-5952 D-5
FWD
Tap LocationsPressure, Sampling, and Sensor
TapNumber Description Schematic
LocationHB Implement Pump Signal Pressure D-4F Charge Pump Discharge Pressure E-7G Case Return E-7H Filter Outlet Pressure F-3
HA Implement Pump Discharge At Pump E-7HC Left Steering Loop F-7HD Right Steering Loop F-7J Hydraulic Oil Cooler Inlet Pressure D-2K Filter Inlet Pressure (SOS) F-3X1 Right Steer Actuator Signal Pressure F-4X2 Left Steer Actuator Signal Pressure F-4Y1 Left Steer Pilot Signal E-3Y2 Right Steer Pilot Signal E-3CP Pilot Oil Supply Pressure B-8
A Implement Pump Discharge Pressure D-4E Charge Pump Relief Pressure E-5
MA Right Steer Loop At Pump F-5MB Left Steer Loop At Pump E-5PS Steer Pump Control Supply E-5
Non Tap Location Points Of Reference
23
23
24
24 25
26
27
28
28
15
29
16
17
22
1 3
32
18
1 1720 19
18
22
3221
21
2
11
20
19 3012 14
7 8
4 5
10
6
330
2
12 14
15 16
7 8
4 5
10
6
HD
HC
2
HA
F
21
G
X2
X1
1
HK
19
Y2 Y1
21 J
18
HB
3
CP
DOZER BLADE
RIPPER
STEERING SYSTEM
IMPLEMENT SYSTEM
RE
NR
36
80
-01
VO
L1
16
Pa
ge
,C
olo
r2
DRAIN / RETURN LINE
LINES GROUP COLOR DESCRIPTIONSSTEER PUMP OUTPUT
TILT CYLINDER CONTROL CIRCUIT
STEERING LOOP CIRCUIT
IMPLEMENT PUMP OUTPUT
RIPPER TIP CYLINDER CONTROL CIRCUIT
SUPPLY LINE
IMPLEMENT PUMP SIGNAL
STEERING PILOT CONTROL CIRCUIT
WINCH CONTROL CIRCUIT
WINCH FREE SPOOL CONTROL CIRCUITLIFT CYLINDER CONTROL CIRCUIT
RIPPER LIFT CYLINDER CONTROL CIRCUIT
12345678
A
C
D
E
F
12345678
A
B
C
D
E
F
B
HD
CP
21
28
284
5
6
1 H
Y1
K
Y2
X2 X1
HA
HB
J
G
F
HC
20
19
17
183
22
23
32 24
25
30
11
16
15
14
12
7
8
8
10
29
26
27
2
MB E
PS
MA
A
RAISE TIP
1 2 3 4
1 2 3 4T S T S
RAISE TILT
1 2 3 4
1 2 3 4T S T S
ELEC. DET.
TILT RIGHT
TILT LEFT
LOWER
RAISE
PILOT DRAINPILOT SUPPLY
SINGLE TILT OPTION
DUAL TILT OPTION
PILOTSUPPLY
MARGIN
CUT-OFF
RIPER TIP
FLOAT PILOT BOOST SIGNAL
TIP/IN
TIP/OUT
RIPER LIFT
RAISE
LOWER
TILT
LIFT
RIPPER LIFT
RIPER TIP
CONTROL PRESSURESUPPLIED BYTRANSMISSION
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
THIS SCHEMATIC IS FOR THE D8R TRACK-TYPE TRACTORPart #: 163-5975 CHG 06 (RIPPER VERSION) VOLUME 1 OF 2Components are shown installed on a fully operable machine with the key and engineoff and transmission shifter in neutral.
AB
RE
NR
36
80
-01
VO
L2
16
Pa
ge
Volume 2 - with Winch
RENR3680-01August 2005
D8R Track-Type TractorHydraulic SystemAKA1-UP6YZ1-UP
© 2005 CaterpillarAll Rights Reserved
Printed in U.S.A.
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
PRESSURECOMPENSATION
PUMP: VARIABLE andPRESSURE COMPENSATED
ENERGY TRIANGLESHYDRAULIC PNEUMATIC
MEASUREMENT
PRESSURE TEMPERATURE FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FIXEDDISPLACEMENT
VARIABLE DISPLACEMENTNON-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
FIXEDDISPLACEMENT
VARIABLE DISPLACEMENTNON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLSRELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE
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
BASICSYMBOL
SPRINGLOADED
CHECK VALVES
TWOPOSITION
INFINITEPOSITIONING
FLOW IN ONEDIRECTION
FLOW ALLOWED INEITHER DIRECTION
THREEPOSITION
CROSSFLOW
PARALLELFLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
A B
P T
A B
P TSHIFTED POSITION INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOTCONTROLLED
Hydraulic Symbols (Electrical)
Electrical Symbols Table
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 NumberIdentification
Wire Number Identification Codes
Current Standard
Previous Standard
Electrical Schematic Example Hydraulic Schematic Example
325-PK
Wire ColorCircuit NumberIdentification
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)
FWD
ItemNumber Description Part
NumberSchematicLocation
1 Pump Gp - Steering / Cooling 139-4151 F-42 Motor Gp - Steering 159-7162 F-63 Pump Gp - Implement 9T-8346 D-3
5 Manifold Gp - Inlet & Relief 163-0829 D-66 Valve Gp - Dozer Lift Section 160-5953 D-67 Valve Gp - Tilt Section 160-5954 C-69 Valve Gp - Winch Section 124-2906 B-610 Cover - End 169-9119 A-611 Valve Gp - Dozer Pilot Control 200-0189 A-313 Valve Gp - Winch Pilot Control 160-0766 A-814 Valve Gp - Implement Lockout 130-4531 B-815 Accumulator - Pilot Circuit 200-0750 B-816 Valve Gp - Pressure Reg Manifold 162-0162 C-817 Valve Gp - Cooler Bypass 126-0747 E-318 Cooler - Hydraulic Oil 153-1271 D-219 Filter Gp - Steering Charge 177-6979 F-320 Valve Gp - Steering Pilot 9T-8693 F-321 Valve Gp - Pressure Control 163-0057 E-622 Valve Gp - Quick Drop 109-6942 D-223 Cylinder Gp - Lift 6E-1102 D-124 Cylinder Gp - Dual Tilt 6E-0397 C-125 Cylinder Gp - Single Tilt 6E-1175 B-130 Tank Gp - Hydraulic Oil 164-3700 C-331 Winch Unit 160-5555 E-832 Valve Gp - Dual Tilt 106-9648 C-1
4 Valve Gp - Dozer & Winch ImpDozer Only
160-8612160-5952 D-6
Component Locations (Volume 2)
Tap LocationsPressure, Sampling, and Sensor
TapNumber Description Schematic
LocationHB Implement Pump Signal Pressure D-4F Charge Pump Discharge Pressure E-6G Case Return E-6H Filter Outlet Pressure F-3
HA Implement Pump Discharge At Pump E-6HC Left Steering Loop E-6HD Right Steering Loop F-6J Hydraulic Oil Cooler Inlet Pressure D-2K Filter Inlet Pressure (SOS) F-3X1 Right Steer Actuator Signal Pressure F-4X2 Left Steer Actuator Signal Pressure F-4Y1 Left Steer Pilot Signal E-3Y2 Right Steer Pilot Signal E-3CP Pilot Oil Supply Pressure B-8
A Implement Pump Discharge Pressure D-4E Charge Pump Relief Pressure E-5
MA Right Steer Loop At Pump F-5MB Left Steer Loop At Pump E-5PS Steer Pump Control Supply E-5
Non Tap Location Points Of Reference
15 16
17
22
1 3
32
18
1 1720 19
18
22
3221
21
2
11
20
19 3013 14
7 9
4 5
10
6
330
2
13 14
15 16
7 9
4 5
10
6
23
23
24
24 25
31 HD
HC
2
HA
F
21
G
X2
X1
1
HK
19
Y2 Y1
21 J
18
HB
3
CP
STEERING SYSTEM
IMPLEMENT SYSTEM
DOZER BLADE
WINCH
RE
NR
36
80
-01
VO
L2
16
Pa
ge
,C
olo
r2
DRAIN / RETURN LINE
LINES GROUP COLOR DESCRIPTIONSSTEER PUMP OUTPUT
TILT CYLINDER CONTROL CIRCUIT
STEERING LOOP CIRCUIT
IMPLEMENT PUMP OUTPUT
RIPPER TIP CYLINDER CONTROL CIRCUIT
SUPPLY LINE
IMPLEMENT PUMP SIGNAL
STEERING PILOT CONTROL CIRCUIT
WINCH CONTROL CIRCUIT
WINCH FREE SPOOL CONTROL CIRCUITLIFT CYLINDER CONTROL CIRCUIT
RIPPER LIFT CYLINDER CONTROL CIRCUIT
12345678
A
C
D
E
F
12345678
A
B
C
D
E
F
B
TILT RIGHT
TILT LEFT
LOWER
RAISE
PILOT DRAIN
PILOT SUPPLY
HD
21
31
4
5
6
CP
A
MB E PS
MAH
Y1
K
Y2
X2 X1
20
19
17
1
HA
G
FHC
2
HB
3
J18
22
23
32 2430
25
11
7
10
9
16
15
14
13
THIS SCHEMATIC IS FOR THE D8R TRACK-TYPE TRACTORPart #: 163-5975 CHG 06 (WINCH VERSION) VOLUME 2 OF 2Components are shown installed on a fully operable machine with the key and engineoff and transmission shifter in neutral.
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
SINGLE TILT OPTION
DUAL TILT OPTION
PILOTSUPPLY
MARGIN
CUT-OFF
FLOAT PILOT BOOST SIGNAL
WINCH
TILT
LIFT
RAISE TILT
1 2 3 4
1 2 3 4T S T S
ELEC. DET.
AB
FREE SPOOL HAUL IN/PAY OUT
1 2 3 4
1 2 3 4T S T S
ELEC. DET.
G
X
Recommended