Hydraulic System

Printed in U.S.A.© 2009 Caterpillar, All Rights Reserved

KENR6503-02October 2009

D11T Track-Type Tractor

GEB1-UP

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)

PUMP(2 - SECTION)

SPRING(ADJUSTABLE)

VARIABILITY LINE RESTRICTION(VARIABLE)

PRESSURECOMPENSATION

PUMP(VARIABLE & PRESSURE

COMPENSATED)

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH - PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVE ENVELOPES VALVE PORTS

FLUID CONDITIONERPUMP OR MOTOR

FLUID POWER SYMBOLS

UNIDIRECTIONAL

BIDIRECTIONAL

RELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED

HYDRAULIC PUMPS

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOID OR MANUAL

SOLENOID & PILOT

SOLENOID &PILOT OR MANUAL

SOLENOID SERVO THERMAL DETENT

HYDRAULIC & PNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASICSYMBOL

SPRINGLOADED

CHECK VALVES

2 POSITIONINFINITE

POSITIONING

FLOW IN ONEDIRECTION

FLOW INEITHER

DIRECTION

3 POSITION

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P TSHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOTCONTROLLED

MAIN AUX

LINE RESTRICTION(VARIABLE & PRESSURE

COMPENSATED)

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS

FLUID STORAGE RESERVOIRS

CROSSING & JOINING LINES

VALVES

PILOT CONTROL SYMBOLS

COMBINATION CONTROLS

BASIC COMPONENT SYMBOLS

ENERGY TRIANGLESHYDRAULIC PNEUMATIC

INTERNALSUPPLY PRESSURE

COMPLETE

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

HYDRAULIC SYMBOLS (ELECTRICAL)

ELECTRICAL SYMBOLS TABLE

325-AG135 PK-14

HARNESS IDENTIFICATION CODE THIS EXAMPLEINDICATES WIRE 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 NUMBER

IDENTIFICATION

B

WIRE

WIRE

(EXAMPLE VALVE)

CURRENT STANDARD

TRANSDUCER(FLUID)

MELECTRIC MOTORTRANSDUCER

(GAS / AIR)

G

GENERATOR

PRESSURE SWITCH ELECTRICAL WIREPRESSURE SWITCH(ADJUSTABLE)

TEMPERATURESWITCH

PRESSURESWITCH

TEMPERATURESWITCH

LEVELSWITCH

FLOWSWITCH

ELECTRICAL SYMBOLS (ELECTRICAL)

A

CIRCUIT NUMBERIDENTIFICATION

WIRECOLOR

WIRE GAUGE

T

KE

NR

6503-0

22

4 P

ag

e,

(Dim

en

sio

ns

: 3

4 i

nc

he

s x

28

in

ch

es

)

COMPONENT LOCATIONS

4

4

5

5 6

6 7

7

8

8

9

9

11

11

12

12

1

115

1518

18

17

17

22

22

35

35

60

60

61

61

62

6263 64

6364

42

42

33

34

33 34

30

31

30 31

32

32

36

36

2

3

2 3

20 21

20

21

16

16

40 41

5251

525170

70 71

71 10

10

40

41

16

13

13

HPS HPDL HPDR HPSO HPRL HPTL HPSI HPTR HPRR

HPDL

HPDR

HPSO

HPRL

HPTL

HPSI

HPTR

HPRR

HPS

PILOT TAP LOCATIONS

FAN AND PILOT PUMP TAP LOCATIONS

HFRP

HFM1

HPRV

HPRV

DOZER / TILT CONTROL (12)

HPD2

HFR1

64

63

DIVERTER (42)

HPD38

TOP VEIW

98

FAN PUMP

PILOT PUMP12

42

19

19

Tap LocationsPressure and Sampling

TapNumber Description Schematic

LocationPump Discharge 1Pump Discharge 2Pump Discharge 3Pilot SupplyPilot Lift RaisePilot Lift LowerPilot Tilt LeftPilot Tilt RightPilot Ripper RaisePilot Ripper LowerPilot Shank InPilot Shank OutFan Pump DischargeFan Motor Inlet

HPD1HPD2HPD3HPS

HPDRHPDLHPTLHPTRHPRRHPRLHPS1HPSOHFRPHFM1HPRV RV Pressure Signal

C-6C-5B-4D-3D-4D-5C-4C-5C-5C-4C-4C-5C-2C-2D-5

Description PartNumber

MachineLocation

SchematicLocation

Cooler Gp - HydraulicCylinder Gp - LH LiftCylinder Gp - RH LiftFilter Gp - Pilot SupplyManifold - Fan PumpManifold Gp - Pilot, Slctr / Redcr

Pump Gp - Dozer and TiltPump Gp - Fan and PilotSolenoid - Artic OptionTank Gp - HydraulicValve Gp - Control, Dozer / TiltValve Gp - Cooler BypassValve Gp - E/H PilotValve Gp - Quick DropValve Gp - Resolver, ShuttleValve Gp - Vacuum Breaker

Cylinder Gp - LH, Dual TiltCylinder Gp - RH, Dual TiltValve Gp - Control, Dual Tilt

Cylinder Gp - Ripper Lift, LHCylinder Gp - Ripper Lift, RHCylinder Gp - Ripper Pin PullerCylinder Gp - Ripper Tilt, LHCylinder Gp - Ripper Tilt, RHValve Gp - Ripper Lift / TipValve Gp - Solenoid

Cylinder Gp - LH Lift, Cylinder Gp - RH Lift, PostioningValve Gp - Diverter

Screen GpScreen Gp

Valve Gp - EU Vacuum Breaker

Switch - Press, Case Drain BypassSwitch As - Fan Filter BypassSensor Gp - PressureSensor Gp - PressureSensor Gp - Pressure

Motor Gp - GerotorValve Gp - Control

Component Locations

Reference Sensors and Switches

Ladder Attachment

Standard

Dual Tilt STD on D11

Ripper Option

Discharge Screen Option

EU Vacuum Breaker Package

Auto Carry Option

Manifold Gp - Control and Relief

Motor Gp - Fan Reversing Fan

190-3832252-0471252-0471249-1751226-6537232-3242

229-0892323-3616

227-9383204-2576149-2610235-0256244-54384T-0884285-56259T-5633132-5077154-6165

308-2462308-2464225-2321

101-8614101-85816E-3113130-6381130-3263285-0139188-6140

252-0473202-4328164-4536

266-0285263-3308

220-0813

258-0883227-6744237-0957237-0957237-0957

254-0148258-8894

229-1466

123456

7

89

10111213151617

19

202122

30313233343536

404142

5152

18

6061626364

7071

18

B-3E-6E-5D-3C-2D-3

C-3

B-4C-2C-1A-4C-6B-3

B-4 to D-5E-5, E-6

D-7A-4

E-7E-4E-5

B-7B-6A-5B-6B-6B-6A-5

E-6E-4B-5

B-4B-3, D-3

A-4

A-3A-3C-1C-6C-5

E-3E-3

D-2

RIGHTSIDEVEIW

KE

NR

6503-0

22

4 P

ag

e,

(Dim

en

sio

ns

: 3

4 i

nc

he

s x

28

in

ch

es

)

THIS SCHEMATIC IS FOR THE D11T TRACK-TYPE TRACTORMEDIA #: KENR6503-02PART NUMBER: 235-2457, CHANGE: 13, VERSION: - Components are shown installed on a fully operable machine.

Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.

A

B

C

D

E

1234567

A

B

C

D

E

1234567

HYDRAULIC CIRCUIT COLOR DESCRIPTIONSLIFT AND TILT PUMP OUTPUT ONEPILOT PUMP OUTPUTFAN PUMP OUTPUTLIFT AND TILT PUMP OUTPUT TWOSUPPLY LINEDRAIN / RETURN LINETILT CYLINDER AND CONTROL CIRCUITIMPLEMENT PILOT SENSINGRIPPER TILT CYLINDER AND CONTROL CIRCUITLADDER MOTOR AND CONTROL CIRCUITRIPPER LIFT CYLINDER AND CONTROL CIRCUITRIPPER PIN PULLER CYLINDER AND CONTROL CIRCUIT

LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing Pressure

Pressure Line

CALLOUTS

Taps (Pressure, Sampling, Sensor - by letter)YY

(52) VALVE GP - CONTROL 138-1234

Callout Number(Machine Location from

Component LocationsTable)

ComponentName

Part Number

HPS

HPRV

HPDL

HPTR

HPRR

HPSO

HPD2

HPD1

HPD3

HPSI

HPRL

HPTL

HPDR

HFM1

HFRP

(C6)

(C5)

(C4)

(C3)

(C5) (C6) (C4) (C3)

S1=PITCHS2=SINGLE TILTDEFAULT=DUAL TILT

S2

S1

TYPICAL

RE

HEEND STROKEBYPASS VLV

LOWER/FLOAT RAISE

RV

RIP UP RIP DOWN

TIP OUT TIP IN

TILT RT TILT LT

TANKSUPPLY(TRANS)

RIPPER

BLADE

(1) COOLER GP -HYDR. OIL

190-3832

(13) VALVE GP -COOLERBYPASS4T-0884

(2) CYLINDER GP -LH LIFT252-0471

(3) CYLINDER GP -RH LIFT

252-0471

(4) FILTER GP -PILOT SUPPLY249-1751

(6) MANIFOLD GP -PILOT

SEL. / REDUCER232-3242

(71) VALVE GP -CONTROL258-8894

(70) MOTOR GP -GEROTOR254-0148

(52) SCREEN GP -263-3308

(7) MOTOR GP -FAN

229-0892REV. FAN323-3616

(10) SOLENOID -ARTIC OPTION149-2610

(5) MANIFOLD -FAN PUMP226-6537

(9) PUMP GP -FAN AND PILOT204-2576

(62) SENSOR GP -PRESSURE237-0957

(61) SWITCH AS -PRESSURE FAN FILTER BYPASS227-6744

(60) SWITCH AS -PRESSURE CASE DRAIN BYPASS258-0883

(11) TANK GP -HYDRAULIC OIL235-0256

(18) VALVE GP -VACUUM BREAKER

STD: 154-6165EU: 220-0813

(8) PUMP GP -DOZER AND TILT

227-9383

(52) SCREEN GP -263-3308

(51) SCREEN GP -266-0285

(42) VALVE GP -DIVERTER

164-4536

(32) CYLINDER GP -RIPPER PIN PULLER6E-3113

(36) VALVE GP -SOLENOID

188-6140

(31) CYLINDER GP -RH LIFT101-8581

(30) CYLINDER GP - LH LIFT

101-8614

(34) CYLINDER GP -RH TILT130-3263

(33) CYLINDER GP -LH TILT130-6381

(35) VALVE GP -RIPPER

LIFT AND TIP285-0139

(63) SENSOR GP -PRESSURE

237-0957

(64) SENSORGP -PRESSURE237-0957

(12) VALVE GP -CONTROL

DOZER / TILT244-5438

(17) VALVE GP -RESOLVER

SHUTTLE132-5077

(15) VALVE GP -E/H PILOT285-5625

(20) CYLINDER GP -LH DUAL TILT

308-2462

(21) CYLINDER GP -RH DUAL TILT308-2464

(41) CYLINDER GP -RH LIFTAUTO CARRYPOSITIONING202-4328

(40) CYLINDER GP -LH LIFTAUTO CARRY252-0473

(16) VALVE GP -QUICK DROP

9T-5633(16) VALVE GP -QUICK DROP9T-5633

(22) VALVE GP -CONTROLDUAL TILT

225-2321

DEAD ELECTRICLOWER VALVE

(19 ) MANIFOLD GP -CONTROL AND RELIEF229-1466

TT

C2

C1

T

T

C2

TT

C1

P

P