RE
NR
9028-0
13
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(Dim
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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
0 P
ag
e,
Co
lor
2 (
Dim
es
ion
s 3
9 I
nc
he
s X
28
In
ch
es
)
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)
Recommended
