RENR4184-04 16 Page RENR4184-04 September 2005 14H Motor Grader Hydraulic System ASE1-UP © 2005 Caterpillar All 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 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 PEDAL GENERAL MANUAL PUSH BUTTON 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 FLUID POWER SYMBOLS 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 AB PT AB PT SHIFTED POSITION INFINITE POSITION CONTROL VALVES ATTACHMENT MANUAL SHUTOFF SHUTTLE PILOT CONTROLLED Hydraulic Symbols (Electrical) Electrical Symbols Table 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 T Pressure Symbol Temperature Symbol Level Symbol Flow Symbol Electrical Symbols (Electrical) FWD Signal Line Line for Pump to the Fan Speed Solenoid Vent Line to the Combination Valve Line to the Fan Drive Motor from the Makeup Valve Line to the Makeup Valve from the Fan Drive Motor Line to the Makeup valve from the Pump Line to the Hydraulic Tank from the Makeup Valve Tank Return Line Tap Number Description Schematic Location BB C-9 C-12 B-8 Implement & Steering Load Sensing Signal Pressure Tap Locations Pressure, Sampling, and Sensor CC Pump Supply Pressure (Implement / Steering) AA Pump Output Pressure (Fan) Description Part Number Machine Location Schematic Location Cover 101-9346 Cylinder Gp 9T-8944 5 Cylinder Gp 262-1906 6 Cylinder Gp 9T-3206 7 Cylinder Gp 121-9243 12 Cylinder Gp 165-2495 8 Cylinder Gp 165-2496 11 10 9 Cylinder Gp (2) 262-1903 4 3 F-13, G-1, J-2, J-4 Cylinder Gp (2) 184-6804 2 Manifold - Left 102-8385 Manifold - Right 102-6238 Motor Gp - Gear 224-7040 13 Motor Gp - Gerotor 9T-5977 14 Pump Gp - Metering Pump Gp - Piston 184-7448 15 Pump Gp - Piston (Implement & Steering) 177-7517 17 16 Swivel Gp 260-6502 20 Tank Gp & Filter 207-2410 21 Valve Gp - Check 175-0447 22 Valve Gp - Combination 9T-5957 23 24 25 26 27 28 29 30 31 B-10 B-9 F-11 Switch As - Pressure 230-5771 19 B-6 Sensor Gp - Pressure 167-1709 18 B-5 C-13 C-7 Valve Gp - Control 107-0560 Valve Gp - Control 107-0554 Valve Gp - Control 107-0561 Valve Gp - Control 107-0555 Valve Gp - Control 107-0557 Valve Gp - Control 107-0564 Valve Gp - Control 107-0556 Valve Gp - Control 6E-3030 Valve Gp - Mounting & (Fan Speed Solenoid) 193-5765 32 D-1, D-14, H-7, I-14 G-11 F-4 G-12 F-3 G-8 G-7 F-5, F-6 D-8 D-6 B-5 G-10 B-5 E-6 E-9 E-5 E-11 E-14 E-1 E-12 E-3 C-11 Valve Gp - Pump Control (Pressure & Flow Compensator) (for Hydraulic Fan Pump) 104-3122 34 C-9 (for Implement & Steering Pump) 168-2210 33 C-10 131-0753 Valve 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-4 E-2, H-2 Accumulator Gp (2) 160-9413 37 Cylinder Gp - Ripper 113-5264 38 39 Pump Gp - Electric Drive (Secondary Steering) 123-8915 40 Valve Gp - Check 9T-6146 42 Valve Gp - Control 107-0559 43 Valve Gp - Control 107-0559 Valve Gp - Control (Snow Wing LIft - Heel) 137-8106 44 Valve Gp - Control (Snow Wing Tilt - Toe) 137-8104 45 Valve Gp - Relief 9T-8071 48 47 Valve Gp (2) - Mounting & (Blade Cushion Solenoid Valve) 253-1320 46 Valve Gp- Check 9T-1013 41 G-2, G-14 J-10 A-6 C-7 I-9 I-10 I-13 I-12 A-7 F-2, F-13 A-7 Inst - Test 6E-3164 Component Locations Misc Ref Attachments Description Part Number Machine Location Schematic Location (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-7 Note A 222-3770 Note 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). 239-9893 239-9894 49 50 I-4 I-1 AccuGrade Attachments Description Part Number Machine Location Schematic Location Manifold Gp - Control (LH) Manifold Gp - Control (RH) Machine Component Locations 1 34 34 42 23 23 23 18 22 13 33 16 32 Combination Valve Combination Valve Hydraulic & Steering System Hydraulic Fan Drive CC BB BB AA BB CC AA Implement Drain Lines Implement Supply Lines Implement Signal Lines Steering Pump Supply 8 9 10 14 20 47 4 36 30 49 27 2 25 11 28 24 25 26 27 28 29 30 31 43 44 45 46 2 26 29 12 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 CC BB 39 19 1 ALT. side dependent on machine arrangement. The Following Control Valves may be located or (RH) machine on either (LH) Alternate Location for some models.