INTERACTIVE SCHEMATIC
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Cover Page Information Schematic Machine Views Component Table Tap TableFluid Power Symbols Electrical Symbols Front Frame Rear Frame Tap Views Features Options Bookmarks X EC-C3 EC-C2 E-C60 EC-C1 E-C61
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©2010 Caterpillar, All Rights Reserved Printed in U.S.A.
RENR9028-02
November 2010
14M Motor Grader
Hydraulic System
B9J1-UP
R9J1-UP
COMPONENT LOCATION
Part
Number
Machine
Location
Schematic
Location
Accumulator GP - Blade Cushion 219-8035 1 D-6 Accumulator GP - Brake 249-3860 2 B-2 Breather AS 9R-9925 3 B-8 Control GP - Brake Pedal 301-4129 4 D-1 Cylinder GP - Articulation 303-9598 5 D-8 Cylinder GP - Blade Lift 270-7536 6 D-6 Cylinder GP - Blade Tip 9T-8944 7 F-4 Cylinder GP - Center Shift 262-1906 8 F-5 Cylinder GP - LH Steering 276-5682 9 E-3 Cylinder GP - RH Steering 276-5681 10 E-3 Cylinder GP - Ripper Lift 113-5264 11 F-8 Cylinder GP - Side Shift 257-5083 12 F-5 Cylinder GP - Wheel Lean 249-5299 13 F-7 Filter GP - Pilot 191-9784 14 B-4 Filter GP - Return 249-2307 15 A-8 Lock GP - Center Shift 298-2600 16 D-5 Manifold GP - Control Blade Cushion 253-1320 17 D-7 Manifold GP - Pilot Shutoff Solenoid 263-1790 18 B-5 Motor GP - Circle Drive 9T-5977 19 F-6 Motor GP - Fan 250-9831 20 A-3 Pump GP - Fan / Brake 250-8337 21 B-7 Pump GP - Implement / Steering 246-4486 22 B-6 Pump GP - Secondary Steering 273-8714 23 A-6 Screen - Implement Control Valve (Front) 250-1420 24 E-3 Screen - Implement Control Valve (Rear) 250-1420 25 C-5 Screen - Steering Pilot Manifold Valve 6E-5066 26 C-2 Swivel - Blade 260-6502 27 F-4 Tank GP - Hydraulic Oil 241-3867 28 B-8 Valve - Shuttle (Load Signal Resolver) 6R-7605 29 B-4 Valve GP - Check (E) 193-9230 30 B-5 Valve GP - Check (Implement / Steering) 255-3631 31 B-6 Valve GP - Check (Secondary Steering) 9T-1013 32 A-5 A-4 Valve GP - Cooler Bypass 266-1595 33
Valve GP - Fan / Brake Control 251-8256 34 A-3 (5-Bank) 259-6919
(6-Bank) 291-9518
Valve GP - Implement Control (Rear) 259-6923 36 C-5 Valve GP - Relief (Secondary Steering) 9T-8071 37 A-5 Valve GP - Steering Control 308-0935 38 D-2 Valve GP - Steering Pilot Manifold 254-3415 39 C-2
Description
TAP LOCATION
Tap
Number
Description
Schematic
Location
AA
Implement / Steering Pump Load Sense
B-6
BB
Implement / Steering Pump Pressure
B-5
CC
Pilot Supply Pressure
B-5
DD
Fan Motor Supply Pressure
A-3
EE
Service Brake LH Pressure
D-2
FF
Service Brake RH Pressure
C-2
FLUID POWER SYMBOLS
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 RESTRICTION
VARIABLE and PRESSURE COMPENSATED
PRESSURE COMPENSATION
PUMP: VARIABLE and PRESSURE COMPENSATED
ENERGY TRIANGLES HYDRAULIC PNEUMATIC
MEASUREMENT
PRESSURE TEMPERATURE FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER GENERAL MANUAL PUSH BUTTON PEDAL SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL HYDRAULIC PUMPS
FLUID STORAGE RESERVOIRS
CROSSING AND JOINING LINES
VALVE ENVELOPES VALVE PORTS
BASIC COMPONENT SYMBOLS
FLUID CONDITIONER PUMP or MOTOR FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL VALVES
PILOT CONTROL SYMBOLS
RELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED COMPLETE INTERNAL SUPPLY 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 ACTING SINGLE ACTING BASIC SYMBOL SPRING LOADED CHECK VALVES TWO POSITION INFINITE POSITIONING FLOW IN ONE DIRECTION FLOW ALLOWED IN EITHER DIRECTION THREE POSITION CROSS FLOW PARALLEL FLOW INTERNAL PASSAGEWAYS NORMAL POSITION A B P T A B P T
SHIFTED POSITION INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT CONTROLLED
ELECTRICAL SYMBOLS
Hydraulic Symbols (Electrical)
325-AG135 PK-14
Circuit Identification
Number Wire Color Wire Gauge Harness identification code
This example indicates wire 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 Color Circuit Number Identification B A Wire Wire (EXAMPLE VALVE)
Current Standard
Transducer
(Fluid)
Transducer
(Gas / Air)
G
Generator
Electrical Wire
Pressure Switch
M
Electric Motor
Pressure Switch
(Adjustable)
Temperature Switch
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
LINE PATTERNS
Drain / Return Lines Component Group
Pilot / Load Sensing Pressure Pressure Line
CALLOUTS
Taps (Pressure, Sampling,Sensor) by letter
YY
DRAIN / RETURN LINE
LINES GROUP COLOR DESCRIPTIONS
IMPLEMENT AND STEERING PUMP OUTPUT FAN AND 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 CIRCUIT SERVICE BRAKE CONTROL CIRCUIT BLADE LIFT CYLINDER CONTROL CIRCUITS BLADE TIP CYLINDER CONTROL CIRCUIT IMPLEMENT AND STEERING LOAD SENSE CIRCUIT
RIPPER LIFT CYLINDER CONTROL CIRCUIT
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.