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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 Number Identification

Wire Number Identification Codes

Current Standard

Previous Standard

Electrical Schematic Example Hydraulic Schematic Example

325-PK

Wire ColorCircuit Number Identification

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

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

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

SOLENOID or MANUAL

SOLENOID and PILOT

SOLENOID and PILOT 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

T

©2007 CaterpillarAll Rights Reserved

Printed in U.S.A.

RENR9028-01February 2007

14M Motor GraderHydraulic SystemB9J1-UP

Description PartNumber

MachineLocation

Accumulator Gp - Blade Cushion 219-8035 1Accumulator Gp - Brake 249-3860 2Breather Assembly 9R-9925 3Control Gp - Brake Pedal 301-4129 4Cylinder Gp - Articulation 303-9598 5Cylinder Gp - Blade Lift 270-7536 6Cylinder Gp - Blade Lift 270-7536 7Cylinder Gp - Blade Tip 9T-8944 8Cylinder Gp - Center Shift 262-1906 9Cylinder Gp - LH Steering 276-5682 10Cylinder Gp - Ripper Lift 113-5264 11Cylinder Gp - RH Steering 276-5681 12Cylinder Gp - Side Shift 257-5083 13Cylinder Gp - Wheel Lean 249-5299 14Filter Gp - Pilot 191-9784 15Filter Gp - Return 249-2307 16Lock Gp - Center Shift 246-4477 17Manifold Gp - Control Blade Cushion 253-1320 18Manifold Gp - Pilot Shutoff Solenoid 263-1790 19Motor Gp - Circle Drive 9T-5977 20Motor Gp - Fan 250-9831 21Pump Gp - Fan / Brake 250-8337 22Pump Gp - Implement / Steering 246-4486 23Pump Gp - Secondary Steer 273-8714 24Screen - Implement Control Valve (Front) 250-1420 25Screen - Implement Control Valve (Rear) 250-1420 26Screen - Steer Pilot Manifold Valve 6E-5066 27Swivel - Blade 260-6502 28Tank Gp - Hydrualic Oil 241-3867 29Valve - Shuttle (Load Signal Resolver) 6R-7605 30Valve Gp - Check (E) 231-7701 31Valve Gp - Check (Implement / Steer) 255-3631 32Valve Gp - Check (Secondary Steer) 9T-1013 33Valve Gp - Cooler Bypass 266-1595 34Valve Gp - Fan / Brake Control 251-8256 35

259-6919291-9518

Valve Gp - Implement Control (Rear) 259-6923 37Valve Gp - Relief (Secondary Steer) 9T-8071 38Valve Gp - Steering Control 301-5359 39Valve Gp - Steering Pilot Manifold 254-3415 40

Component Locations

Valve Gp - Implement Control (Front) (5-BANK) (6-BANK)

36

Tap LocationsPressure, Sampling, and Sensor

TapNumber Description Schematic

LocationAA Implement / Steering Pump Load Sense B-6BB Implement / Steering Pump Pressure B-5CC Pilot Supply Pressure B-5DD Fan Motor Supply Pressure A-3EE Service Brake LH Pressure D-2FF Service Brake RH Pressure C-2

SOS Hydraulic Oil Sampling B-5

EE

FWD

10

11

1012

11

12 14

14

2536

2536

FF

2637

181

181

7

76

6

9

9

8

817

17 13

13

28

28

20

204

452

52

5 2739

40

30

3726 30

2739

40

24

24

316

29

3 29

1933

32

21

21

35

353815

34 2322

34

3219

15

38 2322 16 33

(LH)

(RH)

LH VIEW

29

19

23

AA BB CC

SOS

15

1519DD

35

SERVICE BRAKES COMPONENT LOCATIONS

FAN / BRAKE CONTROLIMPLEMENT / STEERING CIRCUIT

RE

NR

9028-0

13

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Co

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THIS SCHEMATIC IS FOR THE 14M Motor GraderPART #: 236-8831 CH04Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral.

LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing Pressure

Pressure Line

Attachment

Air Line

CALLOUTS

Taps (Pressure, Sampling,Sensor) by letter

Components by number

YY

52

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

DRAIN / RETURN LINE

LINES GROUP COLOR DESCRIPTIONSIMPLEMENT & STEERING PUMP OUTPUT

FAN & BRAKE PUMP OUTPUT

STEERING CYLINDER CONTROL CIRCUIT

SUPPLEMENTAL STEERING PUMP OUTPUT

SIDE SHIFT CYLINDER CONTROL CIRCUIT

CENTERSHIFT LOCK CONTROL CIRCUIT

SUPPLY LINE

PILOT SHUTOFF CIRCUIT

WHEEL LEAN CYLINDER CONTROL CIRCUIT

CIRCLE DRIVE MOTOR CONTROL CIRCUIT

CENTERSHIFT CYLINDER CONTROL CIRCUIT

ARTICULATION CYLINDER CONTROL CIRCUITSERVICE BRAKE CONTROL CIRCUIT

BLADE LIFT CYLINDER CONTROL CIRCUITS

BLADE TIP CYLINDER CONTROL CIRCUIT

IMPLEMENT & STEERING LOAD SENSE CIRCUIT

RIPPER LIFT CYLINDER CONTROL CIRCUIT

12345678

A

C

D

E

F

12345678

A

B

C

D

E

F

B

BB CCAA

SOS

DD

FF

EE

)(

)(

NOTE A: COMPONENT PART OF EU ATTACHMENTNOTE C: COMPONENT PART OF BLADE CUSHION ATTACHMENT

LS

P

T

A1

PS

A2

FAN/BRAKE PUMP

CENTER SHIFTLOCK

EF

P LS T

Ts

Ps

LE

RE

L

R

CL CR

TANK GPHYDRAULIC241-3867

BREATHER AS9R-9925

PUMP GPIMPLEMENT/STEERING246-4486

PUMP GPFAN/BRAKE250-8337

PUMP GPSECONDARYSTEER273-8714

ACCUMULATOR GPBRAKE249-3860(NOTE A:CE BRAKES249-3862)

VALVE GPFAN/BRAKECONTROL251-8256

SCREEN(FAN/BRAKECONTROL)6E-5066

SCREEN(STEER PILOTMANIFOLDVALVE)6E-5066

VALVESHUTTLE(LOAD SIGNALRESOLVER)6R-7605

VALVE GPSTEERING PILOTMANIFOLD254-3415

SWIVELBLADE260-6502

CYLINDER GPBLADE TIP9T-8944

CYLINDER GPSIDE SHIFT257-5083

CYLINDER GPCENTER SHIFT262-1906

CYLINDER GPWHEEL LEAN249-5299

MOTOR GPCIRCLE DRIVE9T-5977

CYLINDER GPBLADE LIFT270-7536

CYLINDER GPBLADE LIFT270-7536

CYLINDER GPARTICULATE303-9598

IMPLEMENT/STEERING

BLADE LIFT BLADE LIFTARTICULATION

BLADE TIPSIDE SHIFTCENTER SHIFTCIRCLE DRIVEWHEEL LEAN

LOCK GPCENTER SHIFT298-2600

VALVE GPIMPLEMENTCONTROL(REAR)259-6923

SCREENFRONT IMPLEMENTCONTROL VALVE250-1420

VALVE GPCHECK (IMP/STEER)255-3631

VALVE GPCHECK(SEC STEER)9T-1013

SCREENREAR IMPLEMENTCONTROL VALVE250-1420

ACCUMULATORBLADE CUSHION(NOTE C)219-8035

ACCUMULATORBLADE CUSHION(NOTE C)219-8035

MANIFOLD GPBLADE CUSHION(NOTE C)253-1320

MANIFOLD GPBLADE CUSHION(NOTE C)253-1320

RIPPER LIFT

CYLINDER GPRIPPER LIFT113-5264

FILTER GPRETURN249-2307

MANIFOLD GPPILOT SHUTOFFSOLENOID263-1790

FILTER GPPILOT191-9784

VALVE GPRELIEF(SEC STEER)9T-8071

VALVE GPCHECK(E)231-7701

VALVE GPCOOLERBYPASS266-1595

MOTOR GPFAN250-9831

CONTROL GPBRAKE PEDAL301-4129

VALVE GPSTEERING CONTROL308-0935

CYLINDER GPRH STEERING276-5681

CYLINDER GPLH STEERING276-5682

VALVE GPIMPLEMENTCONTROL(FRONT)259-6919 (5-BANK)291-9518 (6-BANK)