RENR4184-04
16Page
RENR4184-04September 2005
14H Motor GraderHydraulic SystemASE1-UP
2005 CaterpillarAll Rights Reserved
Printed in U.S.A.
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)
FWD
Signal LineLine for Pump to theFan Speed Solenoid
Vent Line to theCombination Valve
Line to the FanDrive Motor fromthe Makeup Valve
Line to the Makeup Valvefrom the Fan Drive Motor
Line to theMakeup valvefrom the Pump
Line to theHydraulic Tankfrom theMakeup Valve
Tank Return Line
TapNumber Description
SchematicLocation
BB C-9C-12
B-8
Implement & Steering Load Sensing Signal Pressure
Tap LocationsPressure, Sampling, and Sensor
CC Pump Supply Pressure (Implement / Steering)
AA Pump Output Pressure (Fan)
Description PartNumberMachineLocation
SchematicLocation
Cover101-9346
Cylinder Gp 9T-8944 5Cylinder Gp 262-1906 6Cylinder Gp 9T-3206 7
Cylinder Gp 121-9243
12
Cylinder Gp 165-2495 8Cylinder Gp 165-2496
11109
Cylinder Gp (2)262-1903 4
3F-13, G-1,J-2, J-4
Cylinder Gp (2) 184-6804
2
Manifold - Left 102-8385Manifold - Right 102-6238Motor Gp - Gear 224-7040 13Motor Gp - Gerotor 9T-5977 14Pump Gp - Metering
Pump Gp - Piston 184-7448
15
Pump Gp - Piston(Implement & Steering) 177-7517 17
16
Swivel Gp 260-6502 20Tank Gp & Filter 207-2410 21Valve Gp - Check 175-0447 22Valve Gp - Combination 9T-5957 23
2425262728293031
B-10
B-9
F-11Switch As - Pressure 230-5771 19 B-6Sensor Gp - Pressure 167-1709 18 B-5
C-13
C-7Valve Gp - Control 107-0560Valve Gp - Control 107-0554Valve Gp - Control 107-0561Valve Gp - Control 107-0555Valve Gp - Control 107-0557Valve Gp - Control 107-0564Valve Gp - Control 107-0556Valve Gp - Control 6E-3030Valve Gp - Mounting &
(Fan Speed Solenoid) 193-5765 32
D-1, D-14,H-7, I-14
G-11F-4G-12
F-3
G-8G-7
F-5, F-6
D-8D-6B-5G-10
B-5
E-6E-9E-5E-11
E-14
E-1
E-12E-3
C-11Valve Gp - Pump Control
(Pressure & Flow Compensator)(for Hydraulic Fan Pump)
104-3122 34 C-9(for Implement & Steering Pump)168-2210 33 C-10
131-0753Valve Gp - Unit Test 4 (LH)
(Implement Control Valve Manifold) 104-8653
35
Valve Gp - Unit Test 4 (RH)(Implement Control Valve Manifold) 104-8674
36
E-13, H-4E-2, H-2
Accumulator Gp (2) 160-9413
37
Cylinder Gp - Ripper 113-52643839
Pump Gp - Electric Drive(Secondary Steering) 123-8915 40
Valve Gp - Check 9T-6146 42Valve Gp - Control 107-0559 43Valve Gp - Control 107-0559Valve Gp - Control
(Snow Wing LIft - Heel) 137-8106
44
Valve Gp - Control(Snow Wing Tilt - Toe) 137-8104
45
Valve Gp - Relief 9T-8071 4847
Valve Gp (2) - Mounting &(Blade Cushion Solenoid Valve) 253-1320
46
Valve Gp- Check 9T-1013 41
G-2, G-14J-10
A-6
C-7I-9I-10
I-13
I-12
A-7F-2, F-13
A-7
Inst - Test 6E-3164
Component Locations
Misc Ref
AttachmentsDescription PartNumber
MachineLocation
SchematicLocation
(Secondary Steering)
(Ripper)(Plow/Dozer Lift)
(Secondary Steering)(Secondary Steering)
(Blade Cushion)
(Wheel Lean)
Valve Gp - Shuttle C-8(Wheel Lean)
(Side Shift)(Right Blade Lift)(Left Blade Lift)(Circle Drive)(Center Shift)(Blade Tip)(Articulation)
(Fan Drive)
(Fan Drive)
(Hydraulic Fan)
(Steering)111-0490
1
E-7Note A222-3770Note B
(Circle Drive)(Hydraulic Fan)
(Wheel Lean)Steering (RH)Steering (LH)(Side Shift)
(Center Shift)(Blade Tip)
(Blade Lift)
(Articulation)
Accumulator - Steering 248-6251 B-6
Note A: Used on 14H(1-746).Note B: Used on 14H(747-UP).Note C: Used on 14H(747-818).
239-9893239-9894
4950
I-4I-1
AccuGrade AttachmentsDescription PartNumber
MachineLocation
SchematicLocation
Manifold Gp - Control (LH)Manifold Gp - Control (RH)
Machine Component Locations
1
34
34
42
23
23
23
18
22
13
331632
Combination Valve Combination Valve
Hydraulic & Steering System
Hydraulic Fan Drive
CC
BB
BB
AA
BB
CC
AA
ImplementDrain Lines
ImplementSupply Lines
ImplementSignal Lines
Steering PumpSupply
8 910
14
20
47
4
3630 49
272 2511
28
24 25 26 27 28 29
30 31 43 44 45 46
2 26 2912 24 31 37 50
22
18
36 37
23
40 41
48
33
34
42
15
3
7
5
16
38
17
32
21
6
13
AA
CCBB
39
191
ALT.
side dependent on machine arrangement.
The Following Control Valves may be located
or (RH) machineon either (LH)
Alternate Locationfor some models.
RENR4184-04
16Page,Color4
A
C
B
D
E
F
G
H
I
J
A
C
B
D
E
F
G
H
I
J
14 13 12 11 10 9 8 7 6 5 4 3 2 1
14 13 12 11 10 9 8 7 6 5 4 3 2 1
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 number1
YY
HYDRAULIC CIRCUIT COLOR DESCRIPTIONSImplement & Steering Pump Output.Secondary Steering Pump Output.Steering Metering Pump Output andCylinder Circuit.
Snow Wing Lift and Tilt Cylinder Circuits.Supply Line.Drain / Return Line.Ripper Cylinder Circuit.Signal LineBlade Tip Cylinder Circuit.
Hydraulic Fan Pump Output.
Steering (Circle Drive) Control Circuit.Side Shift Cylinder Circuit.Blade Lift Cylinder Circuits.Articulation Cylinder Circuit.Center Shift Cylinder Circuit.Wheel Lean Cylinder Circuit.Plow/Dozer Lift Cylinder Circuit.
THIS SCHEMATIC IS FOR THE 14H Motor Grader
Components are shown installed on a fully operable machine with the key and engineoff and transmission shifter in neutral.
Part #: 172-9361 CHG07
AA
CC
BBTANK GPFILTER &207-2410
COVERLEFT101-9346
COVERLEFT101-9346
VALVE GPUNIT TEST 4(LEFT IMPLEMENTCONTROL VALVEMANIFOLD)104-8653
VALVE GPCONTROL(LEFT BLADE LIFT)107-0557
CYLINDER GP(BLADE LIFT)262-1903
VALVE GPCONTROL(SIDE SHIFT)107-0556
SWIVEL GP260-6502
CYLINDER GP(SIDE SHIFT)9T-3206
CYLINDER GP(BLADE TIP)9T-8944
VALVE GPCONTROL(BLADE TIP)107-0554
MANIFOLDLEFT102-8385
PUMP GPMETERING(STEERING)
Note A111-0490
Note B222-3770
CYLINDER GPSTEERING (LH)165-2495
CYLINDER GPRIPPER113-5264
CYLINDER GPSTEERING (RH)165-2496
MANIFOLDRIGHT102-6238
VALVE GPCONTROL(ARTICULATION)107-0560
VALVE GPCONTROL(CENTER SHIFT)107-0561
VALVE GPCONTROL(WHEEL LEAN)6E-3030
VALVE GPCONTROL(RIGHT BLADELIFT)107-0564
CYLINDER GP(CENTER SHIFT)262-1906
ACCUMULATOR GP(BLADE CUSHION)160-9413
VALVE GPCONTROL(PLOW/DOZERLIFT)107-0547
VALVE GPCONTROL(RIPPER)107-0559
VALVE GPCONTROL(SNOW WINGLIFT -HEEL)137-8106
VALVE GPCONTROL(SNOW WINGTILT - TOE)137-8104
CYLINDER GP(WHEEL LEAN)121-9243
CYLINDER GPARTICULATION184-6804
VALVE GPCONTROL(CIRCLE DRIVE)107-0555
VALVE GPMTG &(FAN SPEEDSOLENOID)193-5765
PUMP OUTPUTPRESSURE
VALVE GPPUMP CONTROL168-2210
VALVE GPPUMP CONTROL104-3122
PUMP GPPISTON(HYDRAULICFAN)184-7448
PUMP GPPISTON(IMPLEMENT &STEERING)177-7517
SIGNALLINEPRESSURE VALVE GP
CHECK(SECONDARYSTEERING)9T-6146
VALVE GPCOMBINATION9T-5957
VALVE GPCHECK(SECONDARYSTEERING)9T-1013
PUMP GPELECTRIC DRIVE(SECONDARY STEERING)123-8915
SENSOR GPPRESSURE(FAN DRIVE)167-1709
VALVE GPCHECK(FAN DRIVE)175-0447
MOTOR GPGEAR(HYDRAULICFAN)224-7040
COVERRIGHT101-9346
COVERRIGHT101-9346
VALVE GPUNIT TEST 4(RIGHT IMPLEMENTCONTROL VALVEMANIFOLD)104-8674
VALVE GPRELIEF(SECONDARYSTEERING)9T-8071
ADAPTER
PUMPSUPPLYPRESSURE
MOTOR GPGEROTOR(CIRCLE DRIVE)9T-5977
DCBA
E KJHGF
BLADE LIFT SIDE SHIFT CIRCLE DRIVE BLADE TIP ARTICULATION CENTER SHIFT WHEEL LEAN BLADE LIFT
BLADE CUSHIONATTACHEMENT
BLADE CUSHIONATTACHMENT
HYDRAULIC FAN PUMP IMPLEMENT / STEERING PUMPSTEERING
RELIEF VALVE
PRESSURE & FLOWCOMPENSATOR VALVE
PRESSURE & FLOWCOMPENSATOR VALVE
SIGNALRESOLVER VALVE
STEERINGPRIORITY VALVE
SIGNALPURGE VALVE
SIGNALRELIEF VALVE
IMPLEMENTRELIEF VALVE
SECONDARY STEERINGHYDRAULIC PUMP
SNOW WING LIFT (HEEL) SNOW WING TILT (TOE)
RIPPERPLOW / DOZER
LIFT
KJHGF
EDCBA
CYLINDER GP(BLADE LIFT)262-1903
ACCUMULATOR GP(BLADE CUSHION)160-9413
Note A: Used on 14H(1-746).Note B: Used on 14H(747-UP).Note C: Used on 14H(747-818).
SWITCH ASPRESSURE230-5771
T1
BA
TPLS
VALVE GPCONTROL(RIGHT BLADE LIFT)107-0564
MANIFOLD GPCONTROL (RH)239-9894
BLADE LIFT
CYLINDER GP(BLADE LIFT)262-1903
CYLINDER GP(BLADE LIFT)262-1903
VALVE GPSHUTTLENote C131-0753
VALVE GPCONTROL(LEFT BLADE LIFT)107-0557
BLADE LIFT
BLADE LIFT
T1
BA
TPLS
MANIFOLD GPCONTROL (LH)239-9893
VALVE GPMTG &(BLADE CUSHIONSOLENOID)253-1320
ACCUGRADE ATTACHMENTS
VALVE GPMTG &(BLADE CUSHIONSOLENOID)253-1320
ACCUMULATOR GPSTEERING248-6251
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