General Information
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Typical Location of Components (1) Hydraulic tank (2) Hydraulic and steering pump (3) Combination valve (4) Steering accumulator (5) Steering metering pump (6) Left implement valve bank (7) Right implement valve bank (8) Blade lift cylinders (9) Sideshift cylinder (10) Swivel (11) Blade tip cylinder (12) Circle drive (13) Left steering cylinder (14) Right steering cylinder (15) Steering cylinder crossover relief valve (16) Left and right articulation cylinders (17) Centershift cylinder (18) Wheel lean cylinder (19) Blade cushion accumulators (20) Blade cushion solenoid valves (21) Pressure and flow compensator valve | |
Note: Some of the motor graders may have different implements. The number of control valves in each valve group may vary.
The hydraulic system is a proportional priority pressure compensated (PPPC) system. The PPPC system has the ability to provide an equal amount of oil flow to each hydraulic circuit. This is done when the total flow demand exceeds the total available hydraulic pump flow.
The PPPC system is a load sensing system. A load sensing pump performs the pressure compensation function. The implement control valves have an internal flow compensator. The flow compensator performs the proportional priority function.
Caterpillar Information System:
561M Pipelayer Circuit Breakers - Reset
14H and 16H Motor Graders Hydraulic and Steering System Relief Valve (Steering Cylinder Crossover)
143H and 163H Motor Graders All Wheel Drive All Wheel Drive System
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Service Brake Oil Pressure Switch
515 Wheel Skidder and 525 Wheel Skidder Sound Information and Vibration Information
14H Motor Grader Circle Clearances - Check/Adjust
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Brake Pump
16H Motor Grader Battery Disconnect Switch
12H, 140H, 143H, 160H and 163H Motor Graders Power Train Solenoid Valve (Differential Lock)
143H and 163H Motor Graders All Wheel Drive Front Wheel Traction Control
143H and 163H Motor Graders All Wheel Drive Torque Control and Ground Speed Sensor
143H and 163H Motor Graders All Wheel Drive Accumulator (All Wheel Drive)
793B Off-Highway Truck Air System and Brakes Hydraulic Tank (Torque Converter, Hoist, Brake and Transmission)
793B Off-Highway Truck Power Train Hydraulic Tank (Torque Converter, Hoist, Brake, and Transmission) Mounting
793B Off-Highway Truck Air System and Brakes Gear Pump (Hoist and Rear Brake Cooling) - Double Section
793B Off-Highway Truck Air System and Brakes Gear Pump (Hoist and Rear Brake Cooling) - Single Section
793B Off-Highway Truck Air System and Brakes Pump Drive
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Service Brakes
14H and 16H Motor Graders Hydraulic and Steering System Steering System
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Torque Converter
631E Series II, 633E Series II and 637E Series II Wheel Tractor-Scrapers Air System and Brakes Check Valve (Primary Air Tank)
793B Off-Highway Truck Air System and Brakes Air Control Valve (Window Wiper)
793B Off-Highway Truck Air System and Brakes Oil Filter (Rear Brake Cooling)
793B Off-Highway Truck Air System and Brakes Oil Filter (Parking Brake Release)