Operational Checks (Hydraulic System)
The operational checks can be used to find leakage in the system and components that are not functioning correctly. The speed of pipe movement or the torque on a motor can be used to check the condition of the cylinders, motors, and the pumps.
Perform the following operational checks to troubleshoot problems concerning the hydraulic circuits and components on the machine.
- Testing and Adjusting, "Engine Performance - Test"
- Testing and Adjusting, "Travel On Level Ground - Test"
- Testing and Adjusting, "Machine Drift On A Slope - Check"
- Testing and Adjusting, "Cylinder Drift - Check"
- Testing and Adjusting, "Function Test- Time"
The specifications that are listed in tables for the operational checks are calculated average values. The values will vary due to the configuration of the machine and engine speed.
Reference: Refer to Testing and Adjusting, "Engine Performance - Test" for the specifications for engine speed.
Caterpillar Information System:
994K Wheel Loader Power Train Axle Shaft - Remove and Install
994K Wheel Loader Power Train Gear Motor (Axle Oil Cooler Fan) - Remove and Install
340F Excavator Machine Systems Travel Motor Lines
854K Wheel Dozer Monitoring System
374F Excavator Fuel Transfer Pump (Refueling) - If Equipped
D11T Track-Type Tractor Undercarriage - Clean
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340F Excavator Machine Systems Stick Lines
980L Medium Wheel Loaders Sensor Signal (Analog, Active) - Test
980L Medium Wheel Loaders Relay - Test
994K Wheel Loader Power Train Access Doors/Covers - Remove and Install - Ladders and Walkway
980L Medium Wheel Loaders Parameter - Test
980L Medium Wheel Loaders Sensor Signal (Analog, Passive) - Test
980L Medium Wheel Loaders Sensor Signal (PWM) - Test
994K Wheel Loader Power Train Axle Oil Cooler - Remove and Install
D6T Track Type Tractor Power Train Steering Differential and Brake - Disassemble
980L Medium Wheel Loaders Sensor Supply - Test
950 GC Wheel Loader Braking and Hydraulic Fan System Control Manifold (Charging Valve for the Brake Accumulators) - Test and Adjust
950 GC Wheel Loader Braking and Hydraulic Fan System Service Brake System Pressure - Test
950 GC Wheel Loader Braking and Hydraulic Fan System Limit Switch (Stop Light) - Adjust
D6T Track Type Tractor Power Train Steering Differential and Brake - Assemble
950 GC Wheel Loader Braking and Hydraulic Fan System Brake System Air - Purge
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950 GC Wheel Loader Braking and Hydraulic Fan System Parking Brake - Manual Release