Component Locations

Item Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1A 2A 3A 1B 2B 3B 4B 5B 6B 7B 8B 1C 2C 1D 2D 1E 2E 3E 1F 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 - RELIEF PILOT SUPPLY SELECTOR AND REDUCER FILTER GP PILOT SUPPLY FILTER 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

Description STANDARD CONFIGUR ATION

Part Number
211-4364 228-0272 9T-2869 232-0654 234-3025 263-3912 247-3026 232-3242 249-1751 220-0780 212-0272 2W-9978 163-1829 4T-4205 154-6165

Schematic Location
A-3 B-3 F-5 F-4 D-6 E-5, E-6 D-4, C-4 E-3 E-2 C-1 C-2 C-2 C-2 F-5, F-6 B-4 F-7 F-7 F-4 A-6 A-7 A-6, A-7 A-5 B-6 C-7 A-5 C-6 F-5 B-4 C-2 E-1 A-2 C-1 B-6 A-4

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 operato r compartment. It controls the following functions:
BLADE RAISE, BLADE LOWER/FLO AT, TILT RIGHT, TILT LEFT.

D E

RENR7531 December 2005

PUMP or MOTOR FLUID CONDITIONER SPRING

FLUID POWER SYMBOLS

BASIC COMPONENT SYMBOLS
MAIN AUX.

CONTROL VALVES

RESTRICTION

LINE RESTRICTION (FIXED)

2-SECTION PUMP

PUMP: VARIABLE and PRESSURE COMPENSATED

G
VARIABILITY SPRING (ADJUSTABLE) LINE RESTRICTION (VARIABLE) PRESSURE COMPENSATION HYDRAULIC PNEUMATIC ENERGY TRIANGLES LINE RESTRICTION
VARIABLE and PRESSURE COMPENSATED

ATTACHMENT

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:

VALVE ENVELOPES

VALVES

VALVE PORTS

ONE POSITION

TWO POSITION

THREE POSITION

TWO-WAY

THREE-WAY

FOUR-WAY

H
AB P T NORMAL POSITION

CONTROL VALVES
AB

CHECK VALVES

P T SHIFTED POSITION

INFINITE POSITION

DUAL TILT OPTION

CYLINDER GP DUAL TILT (LH) CYLINDER GP DUAL TILT (RH) VALVE GP-DUAL TILT 232-0653 232-0652 225-2321

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) 192-6446 192-6445 4T-9977 6E-3113 235-3506 263-3912 188-6140 164-4540 231-0865

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)

BASIC SYMBOL

SPRING LOADED

SHUTTLE

PILOT CONTROLLED

MEASUREMENT

ROTATING SHAFTS

PRESSURE

TEMPER ATURE

FLOW

UNIDIRECTIONAL

BIDIRECTIONAL

DOZER CONTROL VALVE 5

D10T Track-Type Tractor Hydraulic System

RJG529-UP

FLUID STORAGE RESERVOIRS

VENTED

PRESSURIZED

RETURN ABOVE FLUID LEVEL

RETURN BELOW FLUID LEVEL

COMBINATION CONTROLS

ATUO CARRY OPTION

CYLINDER GP RH LIFT WITH POSITION SENSING VALVE GP-DIVERTER FOR CRUISE CONTROL OPT

SOLENOID

164-4536 212-4977 229-1466 253-2673 237-0957 237-0957 117-9152

REVERSING DEMAND FAN OPTION

MOTOR GP- NO ANTI-CAV VALVE ( BI-DIRECTIONA VALVE GP-DVTR REVERSING FOR DEMAND FAN

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 transmissio n inspection cover and just below the fuel tank. It controls the following functions: RIPPER RIPPER RIPPER RIPPER RAISE, LOWER, SHANK IN, SHANK OUT.

SOLENOID or MANUAL

SOLENOID and PILOT

SOLENOID and PILOT or MANUAL

SERVO

THERMAL

DETENT

MANUAL CONTROL SYMBOLS

REFERENCE SENSORS AND SWITCH

PRESSURE SWITCH ASSEMBLY TRANSDUCER-PRESSURE TRANSDUCER-PRESSURE

PUSH-PULL LEVER

MANUAL SHUTOFF

GENERAL MANUAL

PUSH BUTTON

PEDAL

SPRING

PILOT CONTROL SYMBOLS

RELEASED PRESSURE REMOTE SUPPLY PRESSURE

EU VACUM BREAKER PACKAGE

VALVE GP-VACUUM

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:

EXTERNAL RETURN

INTERNAL RETURN

SIMPLIFIED

COMPLETE

INTERNAL SUPPLY PRESSURE

ACCUMUL ATORS

CROSSING AND JOINING LINES

HYDRAULIC AND PNEUMATIC CYLINDERS

SPRING LOADED

GAS CHARGED

LINES CROSSING

LINES JOINING

SINGLE ACTING

DOUBLE ACTING

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) 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.

HYDRAULIC PUMPS
FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENS ATED

HYDRAULIC MOTORS
FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENS ATED

INTERNAL PASSAGE WAYS

INFINITE POSITIONING THREE POSITION TWO POSITION

UNIDIRECTIONAL

UNIDIRECTIONAL BIDIRECTIONAL
CROSS FLOW

BIDIRECTIONAL

FLOW IN ONE DIRECTION

PARALLEL FLOW

FLOW ALLOWED IN EITHER DIRECTION

Tap Locations Pressure, Sampling, and Sensor

Tap Number
HPD1 HPD2 HPD3 HPS HPDR HPDL HPTL HPTR HPRR HPRL HPSI HPSO HFPD FS HDFP HPRV

Description 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 FLUID SAMPLING DEMAND FAN PUMP DISCH. RV PRESSURE SIGNAL

Schematic Location
B-3 B-3 B-4 E-2 D-3 D-5 D-3 D-5 C-5 C-3 C-3 C-5 B-3 A-3 C-2 E-5
HPS HPTR HPDL HPRV

RIPPER CONTROL VALVE 5B

2005 Caterpillar All Rights Reserved

Printed in U.S.A.

Electrical Symbols Table

8 7 6B
HDFP

2E 10

12 11

*18

1A 3A

Hydraulic Symbols (Electrical)

DR =
5B 7B 8B 3B

HPD R HPS O

2B C

TO = RV = RD =
D

Transducer (Fluid)

Transducer (Gas / Air)

Generator

Electric Motor

HPRL HPD L Electrical Wire (Adjustable)

3 4B 1B 1C
Major components in the hydraulic system are located under the operator platform and may be
HPD3

TI = TR = RU =

HPSI HPT R HPR R

T

points shown in the illustration above are:

HFPD

tank. The EH pilot manifold (C) is located on top of the main case, just below the floor plates in the operator compartment.

F
HPTR HPDL HPRV HPDR HPSO HPRR HPS HPTL HPSI

Pressure Symbol

Temperature Symbol

Level Symbol

Flow Symbol

7 5 6 5B 8 6B

1F

15

FS

*14
pilot manifold.

8B

3 1C
- blade raise, or dozer raise solenoid (DR)

To Ripper Tip To Ripper Tip Control Valve Control Valve (Shank In) (Shank Out) To Ripper Lift Control Valve (Ripper Lower) Control Valve (Blade Lower/Float)

Wire Number Identification Codes Electrical Schematic Example

Current Standard
Harness identification code wire 135 in harness "AG". Wire Circuit Number Identification

Hydraulic Schematic Example

Current Standard

B 3B C D
HPS

11

- engine overspeed solenoid, or PCO valve (RV) - blade tilt left solenoid (TL)

To Ripper Lift Control Valve (Ripper Raise)

4B

Wire Color

A. pressure reducing manifold B line from the logic valve resolver circuit C. high pressure supply from the pilot pressure D. pilot supply oil to the remote mounted pilot oil filter - ripper shank out, or tip out solenoid (TO)
Drain From Pressure Reducing Manifold Pilot Filter / Pressure Reducing Manifold

- blade lower/float, or dozer lower/float solenoid (DL) DL

DR

TO RV

RD

TL

TI

TR

RU
Number

325-PK

Previous Standard
Wire Wire Color

F. drain to tank

H. dead electric lower valve (screw and locknut)

7B
not available on machines equipped with Autocarry

2C 9

3E

10 2E

HPD2 HFPD HPD1

12 13

2D 2A

3A 1D

Control Valve (Blade Raise)

325-PK-14
To Blade Tilt Control Valve (Blade Tilt Right) To Blade Tilt Control Valve (Blade Tilt Right)

K. diverter valve (HPS). Hydraulic Pilot Supply pressure tap

B
Circuit Number Identification Wire Gauge

(EXAMPLE VALVE)

PRESSURE REDUCING MANIFOLD 8

MACHINE COMPONENT AND TAP LOCATIONS

MANIFOLD GP - PILOT 8

HPD3

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 checked using the pressure tap on the front of the diverter valve.

HFPD

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, and the pressure reducing manifold.

C B A

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 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.

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:

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).

C D E F

B. high pressure line from tilt control valve

C. case drain line D. pilot supply line from the RATAAC fan speed control valve E. dual tilt solenoid F. high pressure line from tilt control valve G. line connections to the left tilt cylinder H. line connections to the right tilt cylinder

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.

B D E
HPD2 HPD1

The rear section of the implement pump (C) supplies oil to the the pilot pressure 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 test port (HFPD) is used to test Fan Pump Discharge Pressure.

DIVERTER VALVE (AUTOCARRY)

2C

IMPLEMENT PUMP 2

DUAL TITL VALVE 3A

HYDRAULIC OIL COOLER 16

24 Page

The pressure reducing manifold is located on the front of the main case,

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.

REN7531

3 14 1A 14

1C 4

3A

2A

C4

C3

S1=PITCH S2=SINGLE TILT DEFAULT=DUAL TILT

S2

(C4)

(C3)

S1

8 2D
E

6B

SINGLE TILT OPTION

C1

CIRCUIT WITHOUT RIPPER

C2

HPS

7
HPRV (RV) PCO VALVE

HPDR HPDL

HFPD

5
D

LOWER/FLOAT

RAISE

HPTL HPTR

(C1)

(P)

10

TILT RT

TILT LT

15
HPRL

1D 2E

HPRR RIP UP DOWN RIP

(C2)
HPSI

HDFP C TO PTO PUMP

RENR7531

24 Page, Color 2

C
HPSO TIP OUT TIP IN

13

(T)

12 6B E3
HPDI HPD 2

HFPD

2C 8B
B

5B

E3

HPD3

1F 15

FS

LINES GROUP COLOR DESCRIPTIONS

IMPLEMENT

LINE PATTERNS
Pressure Line Pilot / Load Sensing Pressure Drain / Return Lines Component Group Attachment Air Line

PUMP (LIFT) IMPLEMENT PUMP (DUAL TILT) IMPLEMENT PUMP (TILT) LIFT CYLINDER CIRCUIT TILT CYLINDER CIRCUIT PCO VALVE SUPPLY LINE DRAIN / RETURN LINE RIPPER CYLINDER CIRCUIT RESOLVER CIRCUIT DEMAND FAN PUMP CIRCUIT PIN PULLER (RIPPER)

2B
A

3B

3B

1B

4B
YY

CALLOUTS
Taps
(Pressure, Sampling,Sensor) by letter

52

Components

by number

7B
THIS SCHEMATIC IS FOR THE D10T TRACK-TYPE TRACTOR

SUPPLY (TRANS)
7 6 5

TANK
4

1
3

E1
2

PART #: 272-9801 CHG 02

Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.