SENR8390-01

8Page

May 2005

D6M Track-Type TractorHydraulic System9ZM1-UP2RN1-UP3WN1-UP4JN1-UP5NR1-UP

5WR1-UP6LR1-UP2YS1-UP4GS1-UP4HS1-UP

2005 CaterpillarAll Rights Reserved

Printed in U.S.A.

SENR8390-01

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)

SENR8390-01

8Page,B&W

1 2 3 4 5 6 7 8

9 1011

12

131415

16

17 18

9

10

d74513

7

8

6

5

AA BB V

12D

19 20

19 20

E

4

8

3

2

K

N

M

E

14

131

9

F

11

10

D

AB

C

D

CC

E15

16

V

R

Y Z

Q

W

S

T

U

T

V

17

17X

U

18P

N M L

EE

CC

KJ

GH

S

D74312

Item Description

A Cylinder BypassB Rod EndC Head EndD SuctionE Pump Case DrainF Implement ReturnG Float DetentH Pump SignalI Ports Blocked when Using "SU" Blade

JLine AA-BB Blocked for Power Beyond EndCoverLine AA-BB Open for Standard End Cover

K For Power Beyond Use 4T-7862 End CoverL System PressureM Signal PressureN Baffle

D6M Schematic

Item Description Quantity

1 4 Bank Valve Group (All Dozers with Ripper) 13 Bank Valve Group (Standard "P" Dozer) 1

2 Bank Valve Group ("SU" Blade) 1

2 Inlet Manifold Cover Assembly 13 Dozer Lift Valve Group (STD "P" Lift) 1

Dozer Lift Valve (Dozers with "SU" Blade orRipper)

1

4 Dozer Tilt Valve Group (STD) 15 Dozer Angle Valve Group (STD) 16 Ripper Lift Valve Group 17 End Cover 18 Check Valve Group 29 Cylinder Group (STD "P" Lift) 2

Cylinder Group ("SU" Lift) 2

10 Cylinder Group (STD "P" Tilt) 1Cylinder Group ("SU" Tilt) 1

11 Cylinder Group (STD "P" Angle) 212 Cylindeer Group (Ripper Lift) 213 Tank Group 114 Filter Element 115 Pump Group 116 Make Up Valve Group (With Line Relief) 2

17 Make Up Valve Group With Line Relief(Dozers With "SU" Blade or Ripper) 1

18 Plug 219 Seal 2

Hydraulic System Components