Component Locations
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 1A 2A 3A 1B 2B 3B 4B 5B 6B 7B 8B 1C 2C 1D 2D E2 E3 1F
STANDARD CONFIGURATION TANK & FILTER GP PUMP GP CYLINDER GP LIFT CYLINDER GP SINGLE TILT VALVE GP-CONT-5-38(A) DOZER LIFT VALVE GP-RESOLVER VALVE GP-MTG & E/H PILOT VALVE; DOZER LIFT & TILT, RIPPER, RV MANIFOLD GP-CONTROL PILOT PRESSURE AND RATAAC FAN SPEED CONTROL VALVE ACCUMULATOR MANIFOLD GP-RELIEF PILOT SUPPLY SELECTOR AND REDUCER FILTER GP PILOT SUPPLY FILTER MOTOR GP RATAAC FAN DRIVE BLOCK-BEARING RATAAC FAN BEARING PUMP GP - DEMAND FAN MOTOR GP - DEMAND FAN COOLER GP-HYD OIL - WATER OVER OIL VALVE GP-COOLER BYPASS VALVE GP-QUICK DROP VALVE GP-VACUUM DUAL TILT OPTION CYLINDER GP DUAL TILT (LH) CYLINDER GP DUAL TILT (RH) VALVE GP-DUAL TILT RIPPER OPTION CYLINDER GP RIPPER LIFT (RH) CYLINDER GP RIPPER LIFT (LH) CYLINDER GP RIPPER TILT CYLINDER GP RIPPER PIN PULLER VALVE GP-RIPPER RIPPER LIFT & TIP VALVE GP-RESOLVER VALVE GP-MOUNTING VALVE GP-RIPPER WARMING (OPTION) ATUO CARRY OPTION CYLINDER GP RH LIFT WITH POSITION SENSING VALVE GP-DIVERTER FOR CRUISE CONTROL OPTI REVERSING DEMAND FAN OPTION MOTOR GP- NO ANTI-CAV VALVE ( BI-DIRECTIONA VALVE GP-DVTR REVERSING FOR DEMAND FAN REFERENCE SENSORS AND SWITCH TRANSDUCER-PRESSURE TRANSDUCER-PRESSURE EU VACUM BREAKER PACKAGE VALVE GP-VACUUM
Schematic Location
211-4364 228-0272 9T-2869 232-0654 234-3025 263-3912
A-3
E-5, E-6
247-3026
D-4, C-4
231-6285
B-2, B-3
211-2069
C-2
232-3242
E-2, E-3
249-1751 217-7101 214-2297 220-0780 212-0272 2W-9978 163-1829 4T-4205 154-6165
E-2
Shown to the right is the dozer control valve. It is mounted to the inside of the right fender, just above the right frame rail. It may be accessed by removing the floor plates in the operator compartment. It controls the following functions:
B-3
C
B
D
F
E
F-4 D-6
MAIN AUX.
C-2 C-2 F-5, F-6 A-4
232-0653 232-0652 225-2321
F-7
192-6446 192-6445 4T-9977 6E-3113 235-3506 263-3912 188-6140 164-4540
A-6
D10T Track-Type Tractor Hydraulic System
F-5
212-4977 229-1466
C-2
237-0957 237-0957
C-1
MANUAL SHUTOFF
PUSH-PULL LEVER
HPS HPDR HPDL HPTL HPTR HPRR HPRL HPSI HPSO HFPD HFMI FS HDFP HPRV
K
It is supplied oil from the lift and tilt sections of the implement pump (when a blade tilt function is not activated). Service points identified in the illustration to the right:
B-6
EXTERNAL RETURN
D
A-4
Schematic Location
HPS
B
C
INTERNAL RETURN
CROSSING AND JOINING LINES
GAS CHARGED
FIXED DISPLACEMENT
LINES CROSSING
HYDRAULIC AND PNEUMATIC CYLINDERS
SINGLE ACTING
LINES JOINING
FIXED DISPLACEMENT
VARIABLE DISPLACEMENT NON-COMPENSATED
UNIDIRECTIONAL
UNIDIRECTIONAL
BIDIRECTIONAL
BIDIRECTIONAL
DOUBLE ACTING
INTERNAL PASSAGEWAYS
HYDRAULIC MOTORS
VARIABLE DISPLACEMENT NON-COMPENSATED
INTERNAL SUPPLY PRESSURE
COMPLETE
TWO POSITION
THREE POSITION
INFINITE POSITIONING
PARALLEL FLOW
FLOW IN ONE DIRECTION
CROSS FLOW
FLOW ALLOWED IN EITHER DIRECTION
Printed in U.S.A.
© 2005 Caterpillar All Rights Reserved
HPTR HPDL HPRV
10 7
6B
HDFP
E2 14
13 12
16 15
*18
DL =
HPDL
DR =
HPDR
B
1A 3A
Hydraulic Symbols (Electrical)
A
B-3 E-2
5B 7B 8B
D-3 D-5 D-3
TO =
2B
3B
D-5
C
HPSO
Transducer (Fluid)
RV =
HPRL
RD =
HPDL
TL =
HPTL
TI =
HPSI
TR =
HPTR
C-5
M
G
B-4
Transducer (Gas / Air)
Generator
Electric Motor
C-3
3
C-3 C-5 B-3
D
4B
B-3 A-3 C-2
1C
1B
E-5
H
HPD3
G
2C
The dozer control valve (A) is mounted to the inside of the right fender and just above the right frame rail. It can be accessed through the floor plates in the operator compartment.
1
19
11
1F
2 8
FS
9
HFMI
17 1D *18 2D
2A 4
The ripper valve (B) is mounted to the rear of the main case, just below the center of the fuel tank.
HPTR HPDL HPRV
7 5 6
HPDR HPSO HPRR
5B 10 6B
HPS
HPTL HPSI
19
1F
1
13 12
FS
*18
The pressure reducing manifold (D) is located on the front of the main case, just below the EH pilot manifold.
3 1C
8B
RU =
15
3B E
HPS
HPRR
Electrical Schematic Example
To Blade Lift Control Valve (Blade Lower/Float)
To Ripper Lift Control Valve (Ripper Raise)
DR
- blade lower/float, or dozer lower/float solenoid (DL)
C. high pressure supply from the pilot pressure and RATAAC fan speed control valve
DL
- ripper shank out, or tip out solenoid (TO)
E. implement lockout valve solenoid
2B 1B
F. drain to tank
2C 11
7B
H. dead electric lower valve (screw and locknut) J. pressure reducing valve
NOTE: *18-Quick Drop Valve is not available on machines equipped with Autocarry
K. diverter valve (HPS). Hydraulic Pilot Supply pressure tap
PRESSURE REDUCING MANIFOLD 10
E3
14 E2 HDFP
HPD3
2 8 9
16 17
2D 2A
3A 1D
Harness identification code This example indicates wire 135 in harness "AG".
HPD1 HPD2 HFPD
B
HFPD
C
A
- ripper raise, or ripper up solenoid (RU)
D
HFMI
E
HPD2
HPD1
Wire
Circuit Number Identification
TR
RU
Wire Color
325-PK Circuit Identification Number
Wire Color
Wire Gauge
RV
Wire Color
Wire
325-PK-14
To PCO Valve
B
To Blade Tilt Control Valve (Blade Tilt Right)
Circuit Number Identification
(EXAMPLE VALVE)
B
A
H
B. high pressure line from tilt control valve
C
G
The hydraulic oil cooler (A) is located beneath the radiator guard. The illustration to the left shows a view from the front of the radiator guard. Return oil from the demand fan enters the cooler at the cooler inlet (B). The cooler bypass valve is contained inside the housing (C).
For machines equipped with dual tilt, the dual tilt valve (A) is mounted to the inside of the radiator guard, and just behind the left grill door. The dual tilt valve allows the operator to tilt the blade right and left, pitch (dump) the blade forward, and rack the blade back. The dual tilt valve is standard on machines equipped with Auto Blade Assist and/or AutoCarry. Service points identified in the above illustration are:
C. case drain line
A
B
D
D. pilot supply line from the RATAAC fan speed control valve
D
The bypass valve is pressure activated, only. The thicker (more viscous) oil creates more pressure, which causes the bypass valve to open when the oil is cold. This allows most of the oil to bypass the cooler. Once the oil is warm (less viscous), the pressure is less for the same volume of oil and the bypass valve remains closed. All of the oil from the demand fan motor will then pass through the cooler. All of the oil exits the cooler, or the bypass valve, through the cooler outlet (D) and returns to the hydraulic tank in either condition.
E. dual tilt solenoid F. high pressure line from tilt control valve
E
G. line connections to the left tilt cylinder H. line connections to the right tilt cylinder
F C
DIVERTER VALVE (AUTOCARRY)
2C
IMPLEMENT PUMP 2
A
Wire Gauge
MANIFOLD GP - PILOT 8
The lift (front) section (A) supplies oil to the blade lift section of the dozer control valve and to the ripper control valve. Pump discharge from the lift section is through the forward pump outlet port (9). Discharge pressure for the lift section (HPD1) may be tested at the forward pressure test port.
The rear section of the implement pump (C) supplies oil to the RATAAC fan motor through the pilot pressure and RATAAC fan speed control valve (D). The rear section also provides oil to the pressure reducing manifold. This oil is pilot oil for the EH pilot manifold and for the dual tilt valve. The two discharge pressure test ports on the RATAAC fan speed control valve are used to test Fan Pump Discharge Pressure (HFPD) and Fan Motor
Current Standard
Previous Standard
To Blade Tilt Control Valve (Blade Tilt Right)
The three-section fixed displacement gear-type implement pump is mounted to the rear of the flywheel housing, at the upper right. This pump supplies oil to the implement valves, the RATAAC fan system, and the pressure reducing manifold.
The tilt section (B) supplies oil to the blade tilt section of the dozer control valve. Pump discharge from the tilt section is through the middle pump outlet port (E). Discharge pressure for tilt section (HPD2) may be tested at the middle pressure test port.
TL
TI
To Blade Lift Control Valve (Blade Raise)
HFMI
B
RD
TO
Pilot Supply From Pilot Filter / Pressure Reducing Manifold
- ripper shank in, or tip in solenoid (TI)
MACHINE COMPONENT AND TAP LOCATIONS
Present on machines with AutoCarry is the diverter valve (A). It is installed at the front, left of the main, near the bottom. When the AutoCarry mode is active, the solenoid valve (B) is energized and directs the flow from the lift (large) pump back to tank. The tilt pump is then the sole supply of oil used for making automatic height adjustments to the dozer blade during the carry cycle. Lift pump pressure (HPD3) at the diverter valve may be checked using the pressure tap on the front of the diverter valve.
Drain From Pressure Reducing Manifold
- ripper lower, or ripper down solenoid (RD)
G. pilot relief valve
Hydraulic Schematic Example
325-AG135 PK-14 To Tank
D. pilot supply oil to the remote mounted pilot oil filter
Flow Symbol
Level Symbol
Current Standard
- blade tilt right solenoid (TR) A. pressure reducing manifold B line from the logic valve resolver circuit
Temperature Symbol
Wire Number Identification Codes
- blade tilt left solenoid (TL)
4B
Pressure Symbol
To Ripper Lift Control Valve (Ripper Lower)
- engine overspeed solenoid, or PCO valve (RV)
Electrical Wire
Temperature Switch
Electrical Symbols (Electrical)
To Ripper Tip Control Valve (Shank In)
To Ripper Tip Control Valve (Shank Out)
- blade raise, or dozer raise solenoid (DR)
B
Pressure Switch (Adjustable)
Pressure Switch
T
The EH pilot manifold (C) is located on top of the main case, just below the floor plates in the operator compartment.
F
A
SIMPLIFIED
HYDRAULIC PUMPS
HPD1 HPD2 HFPD
HPD3
SPRING
REMOTE SUPPLY PRESSURE
ACCUMULATORS
A
HPTL HPDR HPSO HPRR HPSI
B-3
J
D
PEDAL
Electrical Symbols Table
E3 5 6
C
PUSH BUTTON
E-1
117-9152
PUMP DISCHARGE 1 PUMP DISCHARGE 2 PUMP DISCHARGE 3 PILOT SUPPLY PILOT LIFT RAISE PILOT LIFT LOWER PILOT TILT LEFT PILOT TILT RIGHT PILOT RIPPER RAISE PILOT RIPPER LOWER PILOT SHANK IN PILOT SHANK OUT FAN PUMP DISCHARGE FAN MOTOR INLET FLUID SAMPLING DEMAND FAN PUMP DISCH. RV PRESSURE SIGNAL
A
DETENT
THERMAL
PILOT CONTROL SYMBOLS
Major components in the hydraulic system are located under the operator platform and may be accessed by removing the floor plates in the operator compartment (except the ripper valve). The pressure reducing manifold is located on the front of the main case, below the EH pilot manifold. Service points shown in the illustration above are:
GENERAL MANUAL
RELEASED PRESSURE
Tap Locations Pressure, Sampling, and Sensor
HPD3
SERVO
MANUAL CONTROL SYMBOLS
RIPPER CONTROL VALVE 5B
HPD1
BIDIRECTIONAL
RETURN BELOW FLUID LEVEL
SOLENOID and PILOT or MANUAL
SOLENOID and PILOT
E
On machines with a cold weather arrangement, a ripper warming valve is attached to the ripper valve. The warming valve allows a small amount of oil to circulate through the valve and return to tank. This prevents thermal shock from occuring inside the valve.
HPD2
UNIDIRECTIONAL
RETURN ABOVE FLUID LEVEL
SOLENOID or MANUAL
SPRING LOADED
Description
FLOW
PRESSURIZED
SOLENOID
A. high pressure supply hose (connects to the front of the valve - not visible here) B. return oil from ripper cylinders (connects to the return oil manifold - see illustration #92) C. ripper shank in/shank out valve section D. ripper raise/lower valve section E. hydraulic oil passages to/from the right ripper lift cylinder (other side - left cylinder) F. hydraulic oil passages to/from the right ripper shank cylinder (other side - left cylinder)
Tap Number
PILOT CONTROLLED
COMBINATION CONTROLS
RIPPER RAISE, RIPPER LOWER, RIPPER SHANK IN, RIPPER SHANK OUT.
B-4
SHUTTLE
SPRING LOADED
BASIC SYMBOL
ROTATING SHAFTS
TEMPERATURE
VENTED
RJG1-528
A-5
231-0865 164-4536
INFINITE POSITION
FLUID STORAGE RESERVOIRS
A-6, A-7
C-6
P T SHIFTED POSITION
PRESSURE
DOZER CONTROL VALVE 5
F
CHECK VALVES
MEASUREMENT
A-7
A-5
FOUR-WAY
THREE-WAY
AB
AB
P T NORMAL POSITION
The ripper control valve is shown in the illustration to the right. It is mounted to the rear of the main case, just above the transmission inspection cover and just below the fuel tank. It controls the following functions:
TWO-WAY
THREE POSITION
ATTACHMENT
LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED
VALVE PORTS
CONTROL VALVES
H
J
A
F-4
C-7
TWO POSITION
ONE POSITION
F-7
B-6
PUMP: VARIABLE and PRESSURE COMPENSATED
2-SECTION PUMP
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
VALVES
VALVE ENVELOPES
A. hydraulic lines to/from the dozer tilt cylinders B. hydraulic lines to/from the dozer lift cylinders C. lift pump pressure sensor D. lift pump supply to the dozer lift valve E. tilt pump pressure sensor F. return oil manifold from all implement cylinders to tank (dozer valve and ripper valve) G. return oil passage from ripper valve H. tilt pump supply to the dozer tilt valve J. high pressure supply passage to the ripper valve (combined when not using tilt valve)
C-2
LINE RESTRICTION (FIXED)
RESTRICTION
PRESSURE COMPENSATION
LINE RESTRICTION (VARIABLE)
SPRING (ADJUSTABLE)
VARIABILITY
B-1 C-1
CONTROL VALVES
SPRING
FLUID CONDITIONER
G
The dozer control valve is supplied oil from the lift and tilt sections of the implement pump. When raising or lowering the blade, the oil from both sections of the pump are combined. When tilting the blade left or right, the oil from the two sections are segregated so that only the oil from the tilt section of the implement pump is used for tilt and the oil from the lift section of the implement pump is used for raising and lowering the blade. Service points identified in the illustration above are:
B-2
BASIC COMPONENT SYMBOLS
PUMP or MOTOR
BLADE RAISE, BLADE LOWER/FLOAT, TILT RIGHT, TILT LEFT.
F-5
FLUID POWER SYMBOLS
RENR7546-02 October 2005
DUAL TITL VALVE 3A
HYDRAULIC OIL COOLER 16
24 Page
1
Description
Part Number
REN7546-02
Item Number
7
6
4
5
1
1C
3
3
2
3
4 18
18
F
2A
3A
F
1A C4
S1=PITCH S2=SINGLE TILT DEFAULT=DUAL TILT
C3
11
S2
(C4)
6
S1
(C3)
10 2D 6B
E
6
E
6
SINGLE TILT OPTION
C1
P
C2
CIRCUIT WITHOUT RIPPER
HPS
7 HPRV (RV) PCO VALVE
HPDR HPDL
5 D
D
T
RAISE
LOWER/FLOAT
HPTL
14
(C1) (P)
HPTR
TILT RT
TILT LT
15 1D
HPRL
E2
HPRR RIP DOWN
HDFP
(C2) (T)
17
HPSI
C
C TO PTO PUMP
HPSO
24 Page, Color 2
TIP IN
TIP OUT
9 HFMI
6B
8
16
E3 HPDI
HPD2
HFPD
12
13
2C )(
RENR7546-02
RIP UP
8B B
5B
B
2 E3
HPD3
LINES GROUP COLOR DESCRIPTIONS
LINE PATTERNS
IMPLEMENT PUMP (LIFT) IMPLEMENT PUMP (PILOT and RATAAC FAN)
FS
Pressure Line
IMPLEMENT PUMP (TILT)
2B
3B
Drain / Return Lines
SUPPLY LINE DRAIN / RETURN LINE
1B
3B
Pilot / Load Sensing Pressure
LIFT CYLINDER CIRCUIT TILT CYLINDER CIRCUIT PCO VALVE
1F 19
Component Group
RIPPER CYLINDER CIRCUIT RESOLVER CIRCUIT DEMAND FAN PUMP CIRCUIT PIN PULLER (RIPPER)
A
Attachment Air Line
CALLOUTS
4B
YY
Taps (Pressure, Sampling,Sensor) by letter
52
Components by number
7B THIS SCHEMATIC IS FOR THE D10T TRACK-TYPE TRACTOR TANK
SUPPLY (TRANS) 7
6
5
1 4
Part #: 216-8706 CHG 03
E1 3
Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral.
2
1
A
