Steering Motor Case Drain Pressure Test
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Sudden movement of the machine or release of oil under pressure can cause serious injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system. |
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| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
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| Illustration 1 | g00507374 |
(1) Tube assembly (2) Steering motor | |
- Install a 0 to 250 kPa (0 to 36 psi) pressure gauge onto a tee.
- Install the tee with the pressure gauge onto a hose that can replace tube assembly (1) .
- Remove tube assembly (1) .
- Replace tube assembly (1) with the hose assembly that was assembled in Step 2.
- Start the engine. Run the engine at high idle.
- Warm the hydraulic oil to 60°C (140°F).
- Make sure that the transmission control is in the NEUTRAL position.
- Fully depress the service brakes.
- Rotate the steering wheel fully in either direction.
Note: The steering system should not be kept in the stall condition for more than 15 seconds.
- The pressure reading on the pressure gauge should be less than 35 kPa (5 psi).
- If the case drain pressure is not correct, check the case drain flow for the steering motor.
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