Cat D6t

KENR5128-02 January 2015

Component Locations Part Number

Machine Location

Schematic Location

Accumulator Gp - Pilot Oil

200-0750

1

B-6

Cooler Gp - Hydraulic Oil

169-3806

2

D-2

287-1973

3

F-5

4

F-3

Description

Cylinder Gp - Angling

Note B

Cylinder Gp - Lift

Note A

(STD)

227-0844

Note A

(LGP)

227-0843

Note B

(PAT STD)

227-0994

Note B

(PAT LGP)

233-0478

Note A

(Dual - Angling)

227-0841

Note A

(STD)

233-9134

Note B

(PAT)

Cylinder Gp - Ripper Lift

227-0842

Cylinder Gp - Tilt

5 6 7

F-5

8

B-3

Filter Gp - Oil (Hydraulic Fan, Steering)

177-6979

9

E-3

Manifold Flexxaire Fan

6T-9559

10

D-1

272-0258

11

A-4

Manifold Gp - Control (Implement Pilot Pressure)

226-4751

12

C-6

Motor Gp - Piston (Steering Motor)

269-4749

13

E-5

Pump Gp - Piston (Implement)

280-7137 14

C-3

271-2116

(Winch)

278-1445

Pump Gp - Piston (Steering)

271-2114

15

E-4

Screen (Implement Pilot Oil)

6E-5066

16

C-6

Tank & Filter Gp - Hydraulic

273-6050

17

C-3

Bank 2 (Dozer Lift / Tilt)

269-8161

F-7

Bank 3 (Dozer Lift / Tilt / Ripper)

269-8160

F-7

Bank 3 (Dozer Lift / Tilt / Winch)

269-8157

Bank 3 (PAT Dozer Lift / Tilt / Angle)

269-8159

Bank 4 (PAT Dozer Lift / Tilt / Angle / Rip)

269-8158

Bank 4 (PAT Dozer Lift / Tilt / Angle / Winch)

269-8156

18

Valve Gp - Bypass (Cooler)

126-0747

20

D-3

(Dozer Pilot Control)

200-0189

21

B-3

(Ripper Pilot Control)

167-1177

22

A-6

(Steering)

9T-8693

23

E-3

(Winch Pilot Control)

160-0766

24

B-6

Valve Gp - Quick Drop

227-0831

25

F-3

Valve Gp - Relief (Steering Lines Pressure)(Cold Oil)

198-9219

26

D-3

(For Angle Control)

257-0267

27

A-4

(Hydraulic Lockout)

201-0950

28

B-5

Note C

29

F-1

Valve & Mtg Gp - Bulldozer (Grade Control) (EH Solenoid Valve)

239-5317

30

C-2

Valve (Shuttle Valve)

233-6942

31

C-1

Accumulator

C-6 C-6 C-4

HC

Left Steering Loop at Motor

D-5

HD

Right Steering Loop at Motor

E-5

HH

Filter Outlet

E-3

JJ

Cooler Inlet (Backfill)

D-2

KK

Filter Inlet (SOS)

E-3

Implement Manifold Oil Sampling Port Right Steering Actuator

C-6 E-4

X2

Left Steering Actuator

E-4

Y1

Left Steering Pilot

D-3

Y2

Right Steering Pilot

D-3

ATTACHMENT

TWO - WAY

THREE - WAY

FOUR - WAY

CHECK VALVES

P T SHIFTED POSITION

BASIC SYMBOL

INFINITE POSITION

SPRING LOADED

SHUTTLE

PILOT CONTROLLED

JJ

D6T Track-Type Tractor Hydraulic System

9

JHB1-UP ZEB1-UP SMC1-UP JWD1-UP LBD1-UP LAE1-UP DJG1-UP WCG1-UP

HD

2

HC

13

PRESSURIZED

VENTED

RETURN ABOVE FLUID LEVEL

MEASUREMENT

PRESSURE

ROTATING SHAFTS

TEMPERATURE

FLOW

UNIDIRECTIONAL

BIDIRECTIONAL

COMBINATION CONTROLS

WFH1-UP LKJ1-UP KJL1-UP SKL1-UP GCT1-UP RLW1-UP LAY1-UP PEZ1-UP

SOLENOID

SOLENOID OR MANUAL

SOLENOID & PILOT

SOLENOID & PILOT OR MANUAL

SERVO

THERMAL

DETENT

MANUAL CONTROL SYMBOLS

PUSH - PULL LEVER

GENERAL MANUAL

MANUAL SHUTOFF

X2 X1

INTERNAL RETURN

GAS CHARGED

LINES CROSSING

© 2015 Caterpillar, All Rights Reserved

COMPLETE

FIXED DISPLACEMENT

SINGLE ACTING

LINES JOINING

BIDIRECTIONAL

BIDIRECTIONAL

DOUBLE ACTING

INTERNAL PASSAGEWAYS

VARIABLE DISPLACEMENT NON-COMPENSATED

UNIDIRECTIONAL

INTERNAL SUPPLY PRESSURE

HYDRAULIC & PNEUMATIC CYLINDERS

HYDRAULIC MOTORS

VARIABLE DISPLACEMENT NON-COMPENSATED

SPRING

REMOTE SUPPLY PRESSURE

SIMPLIFIED

UNIDIRECTIONAL

Standard, Power Angle Tilt, and AccuGrade Options

PEDAL

CROSSING & JOINING LINES

ACCUMULATORS

FIXED DISPLACEMENT

PUSH BUTTON

PILOT CONTROL SYMBOLS

RELEASED PRESSURE

EXTERNAL RETURN

LINES GP - STEERING

RETURN BELOW FLUID LEVEL

INFINITE POSITIONING

3 POSITION

FLOW IN ONE DIRECTION

PARALLEL FLOW

CROSS FLOW

2 POSITION

FLOW IN EITHER DIRECTION

Printed in U.S.A.

ELECTRICAL SYMBOLS TABLE HYDRAULIC SYMBOLS (ELECTRICAL)

23

13

14

15 26 12

1

G

17 3

3

18 21 27

CP

M

TRANSDUCER (FLUID)

TRANSDUCER (GAS / AIR)

GENERATOR

ELECTRIC MOTOR

PRESSURE SWITCH

PRESSURE SWITCH (ADJUSTABLE)

TEMPERATURE SWITCH

ELECTRICAL WIRE

7 22 24

25

HA

Power Angle Tilt (PAT) - Option

SOS

2

ELECTRICAL SYMBOLS (ELECTRICAL)

4 CPG

6 30 31

17

1 11 12 16 28

TEMPERATURE SWITCH

18

HB

8

PRESSURE SWITCH

LEVEL SWITCH

FLOW SWITCH

WIRE NUMBER IDENTIFICATION CODES

20

ELECTRICAL SCHEMATIC EXAMPLE

HYDRAULIC SCHEMATIC EXAMPLE

CURRENT STANDARD

CURRENT STANDARD

HARNESS IDENTIFICATION CODE THIS EXAMPLE INDICATES WIRE 135 IN HARNESS “AG” WIRE

14 21 27

23

CIRCUIT NUMBER IDENTIFICATION

325-AG135 PK-14

CIRCUIT NUMBER IDENTIFICATION

1 11 12 16 28

WIRE COLOR

WIRE COLOR

WIRE GAUGE

325-PK

PREVIOUS STANDARD WIRE

25

22 24

B

325-PK-14

CIRCUIT NUMBER IDENTIFICATION

6 8 17

WIRE GAUGE

(EXAMPLE VALVE)

20

19

5

10

29

18 13

14 15 26

MACHINE COMPONENT LOCATIONS

A

Standard Dozer Blade BLADES

LINES GP - PILOT

2

30 31

WIRE COLOR

RIPPER

WINCH

FLEXXAIRE FAN

(Dimensions: 39 inches x 28 inches)

SOS X1

LINE RESTRICTION (VARIABLE & PRESSURE COMPENSATED)

VALVE PORTS

THREE POSITION

HYDRAULIC PUMPS

Implement Pump Discharge at Valve Implement Pump Signal

HYDRAULIC PNEUMATIC ENERGY TRIANGLES

FLUID STORAGE RESERVOIRS

Schematic Location

HA HB

PUMP (VARIABLE & PRESSURE COMPENSATED)

A B

SPRING LOADED

B-6

PUMP (2 - SECTION)

VALVES

TWO POSITION

P T

15

Pilot Valve Supply

LINE RESTRICTION (FIXED)

30 Page,

CPG

PRESSURE COMPENSATION

NORMAL POSITION

Tap Locations Pressure, Sampling, and Sensor

CP

LINE RESTRICTION (VARIABLE)

RESTRICTION

CONTROL VALVES

20

Note A: For S-Blade Equipped Machine. Note B: For PAT-Blade Equipped Machine. Note C: Refer to the Parts Manual for your particular machine.

Description

SPRING (ADJUSTABLE)

AB

AccuGrade Option

Tap Number

VARIABILITY

Y2 Y1

D-8 D-1

Winch Ar

CONTROL VALVES

ONE POSITION

D-7 19

Note B

SPRING

VALVE ENVELOPES

F-8

3E-9205

Valve Gp - Solenoid

FLUID CONDITIONER

HH

17

D-7

Valve Gp - Solenoid Flexxaire Fan Valve Gp - Pilot

PUMP OR MOTOR

AUX

KENR5128-02

Valve Gp -

MAIN

E-4

1R-0777

(with LS and Cut Off)

BASIC COMPONENT SYMBOLS

F-4

227-8893

Note B

KK

D-2

Filter Element As - Oil (Hydraulic)

Manifold (For Angle Control)

FLUID POWER SYMBOLS

8

7

6

BANK 3 (DOZ LIFT / TILT / RIP) 269-8160

LS

F

3

2

WINCH AR (NOTE C)

BLADE TILT

G

T2 VALVE GP QUICK DROP 227-0831

3

S2 PAY OUT

CYLINDER GP LIFT

4 LEFT

DR2 LOWER RAISE

A

DR2

DR1

DR1

BL2

LOWER

BL2

BL1

RAISE

BL1

TILT

DUAL TILT OPTION

B

BL1

LIFT

B

C

D

LEFT SIDE OF TRACTOR

VT1

VA2

VT2

VA1

BLADE ANGLE RIGHT

BT1

FS2

NOTE B (STD) (PAT) 227-0994 (LGP) (PAT) 233-0478

RIGHT

BLADE TILT OPTIONS

BLADE LIFT

TILT

DT3

DT4

BT1

RIGHT

STEERING MOTOR

STEERING PUMP

HH KK

BT2

RIGHT

WINCH

STEERING CHARGE FILTER

BT1

LEFT

BT2

X1

RIPPER

HP3

RR1

W1

PAY OUT

R2

W2

HAUL IN

FILTER GP OIL (HYDRAULIC FAN, STEERING) 177-6979

STEERING PILOT VALVE

WINCH OPTION

VALVE GP PILOT (STEERING) 9T-8693 RIGHT

RAISE

HC

LOWER

SOLENOID FLEXXAIRE 3E-9205

LEFT

C1

Y2

P T (HYDRAULIC) 4 WAY 3 POSITION

JJ

COVER

MANIFOLD FLEXXAIRE 6T-9559

D T1

FLOAT PILOT BOOST SIGNAL

S-BLADE & WINCH

T1

FPB

T2

S1

RELIEF VALVE

T

VALVE GP BANK 3 (PAT DOZ LIFT / TILT / ANGLE) 269-8159

VALVE GP BYPASS (COOLER) 126-0747

LS L

BANK 4 (PAT DOZ LIFT / TILT / ANGLE / RIP) 269-8158

LS

S

X

SCREEN (IMPLEMENT PILOT OIL)

R1

(WINCH) 278-1445

IMPLEMENT PUMP

LIFT

CYLINDER GP RIPPER LIFT 227-0842

(WITH LS AND CUT OFF) 271-2116

HB LIFT

S1

HA

RIPPER OPTION

DR1

BL2

LOWER RAISE

BL2

LOWER RAISE

BL1

PAT TILT

AIR RELIEF

T

PS

AIR VENT

BL1

PAT TILT

IMPLEMENT CONTROL VALVE OPTIONS

SOS ACCUMULATOR PRESSURE (CPG)

DT3

DT3

DT4 LEFT RIGHT

CPG

RIGHT

VT1

LEFT

VT2

TANK & FILTER GP HYDRAULIC 273-6050

CPG

DT4

VT1

ACC

VT2

BYPASS

ACCUMULATOR GP PILOT OIL 200-0750

VALVE (SHUTTLE) 233-6942

HYDRAULIC TANK

PAT ANGLE

VALVE GP SOLENOID (HYDRAULIC LOCKOUT) 201-0950

CP

PILOT SUPPLY

LIFT / TILT CONTROL ACCUGRADE OPTION

FILTER ELEMENT AS OIL (HYDRAULIC) 1R-0777

CP

PAT ANGLE

B HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

T1 DA1

DA2

DA1

FREE SPOOL

DA2 LEFT

VA1 VA2

HAUL IN/PAY OUT 2

1

4

3

T

VA1

RIGHT

VALVE & MTG GP BULLDOZER (GRADE CONTROL) 239-5317

DR2

DR2

DR1

C

VACUUM BREAKER

MANIFOLD GP CONTROL (IMPLEMENT PILOT PRESSURE) 226-4751

R2

B

C DR2

COOLER GP HYDRAULIC OIL 169-3806

PUMP GP PISTON (IMP) 280-7137

MARGIN

S1

RELIEF VALVE

D

COOLER BYPASS VALVE

PILOT DRAIN

(Dimensions: 39 inches x 28 inches)

30 Page,

KENR5128-02

LS

C1=PUSH C2=PULL

FLEXXAIRE OPTION

VALVE GP RELIEF (STEERING LINES PRESSURE) (COLD OIL) 198-9219

S-BLADE & RIPPER

VALVE GP BANK 4 (PAT DOZ LIFT / TILT / ANG / WINCH) 269-8156

S-2

S-1

R1

COVER

C2

YI

DT4

LEFT

MOTOR GP PISTON (STEERING) 269-4749

X2

DT3

DT4

E

PUMP GP PISTON (STEERING) 271-2114

DR1

DT3

B

W2

CYLINDER GP TILT (STD) (NOTE A) 233-9134

PAT OPTION

HD

FPB

W1

SINGLE TILT OPTION

LEFT

BT2

HAUL IN

NOTE A (STD) 227-0844 (LGP) 227-0843

A

BL2

CYLINDER GP ANGLING (NOTE B) 287-1973

E

FLOAT PILOT BOOST SIGNAL

F

X

CYLINDER GP TILT (DUAL - ANGLING) (NOTE A) 227-0841

2

RELIEF VALVE

LIFT

1

TOP 1

S1

S1 RELIEF VALVE

4

CYLINDER GP TILT (PAT) (NOTE B) 227-8893

VALVE GP BANK 2 (DOZ LIFT / TILT) 269-8161

VALVE GP BANK 3 (DOZ LIFT / TILT / WINCH) 269-8157

LS

5

S2 WINCH SUPPLY

DOZ TILT

DOZ RAISE

FPB

1

2

4

3

PILOT PUMP OUTPUT IMPLEMENT PUMP OUTPUT WINCH CONTROL CIRCUIT BLADE LIFT CYLINDER CONTROL CIRCUIT SUPPLY LINE RIPPER CYLINDER CONTROL CIRCUIT BLADE ANGLE CYLINDER CONTROL CIRCUIT LOAD SENSING SIGNAL DRAIN / RETURN LINE STEERING AND CHARGE PUMP OUTPUT BLADE TILT CYLINDER CONTROL CIRCUIT

VALVE GP PILOT (DOZER PILOT CONTROL) 200-0189

VA2

LINE PATTERNS PILOT SUPPLY 1

WINCH

RIPPER

RR1

HP3

A

S

2

FS2

3

T

RAISE LOWER

R1

COVER

RIPPER RAISE 1

T1

FLOAT PILOT BOOST SIGNAL

PAT-BLADE & WINCH

DA2

2

FPB

T1

PAT-BLADE & RIPPER

7

T

S

2

DR1

MANIFOLD (FOR ANGLE CONTROL) (NOTE B) 272-0258

ANGLE LEFT

ECM

3

DT3

T

S

Pilot / Load Sensing Pressure

4

Drain / Return Lines

DT4

Component Group Attachment

DR2

Air Line

T

S

DA1

2

LOWER

RAISE

RR1

CALLOUTS

LIFT / TILT CONTROL STANDARD

JOYSTICK THUMB SWITCH

ANGLE RIGHT

Note A: For S-Blade Equipped Machine. Note B: For PAT-Blade Equipped Machine. Note C: Refer to the Parts Manual for your particular machine.

THIS SCHEMATIC IS FOR THE D6T TRACK-TYPE TRACTOR (2 PUMPS) HYDRAULIC SYSTEM MEDIA NUMBER: KENR5128-02 SCHEMATIC PART NUMBER: 265-8972, CHANGE: 05, VERSION: -

DOZER ANGLE CONTROL

RIPPER / WINCH CONTROLS

Components are shown installed on a fully operable machine with the key and engine off, transmission shifter in neutral and with parking brake set. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations. Refer to the Parts Manual using a specific serial number prefix in SIS before ordering parts from this schematic.

MAIN SCHEMATIC

6

5

4

Taps (Pressure, Sampling, Sensor - by letter)

YY

VALVE GP SOLENOID (FOR ANGLE CONTROL) (NOTE B) 257-0267

IMPLEMENT CONTROL VALVE OPTIONS

8

1

PILOT DRAIN

HP3

1

FPB

4

VALVE GP PILOT (RIPPER PILOT CONTROL) 167-1177

COVER

FLOAT PILOT BOOST SIGNAL

S

DOZ ANGLE

R2

PAY OUT HAUL IN

W1 W2

VALVE GP PILOT (WINCH PILOT CONTROL) 160-0766

T

Pressure Line

3

2

1

A