- Move the machine to a smooth level surface. Move away from working machines and personnel. Lower the work tool to the ground.
- Allow only one operator on the machine. Keep all personnel away from the machine or in the view of the operator.
- Engage the parking brake.
The steering time is affected by the amount of oil flow that is produced by the steering pump. Check the steering times in order to determine if there is a problem with the steering pump.
- Perform the machine preparation for testing.
- Warm the hydraulic oil to normal operating temperature. Raise the work tool slightly off the ground.
- Maintain the engine speed at high idle.
- Record the steering time from stop to stop. The steering time should be 2.8 ± 0.3 seconds.
- Lower the boom and place the work tool flat on the ground.
- Reduce engine speed to low idle.
- Stop the engine.
Compare the test results with the cycle times that are listed. The steering pump should be working properly if the cycle times match the cycle times that are listed.
If the cycle times are not correct one of the following conditions may be present:
- The engine is not running properly.
- The pump may have excessive wear.
Perform the torque converter stall test. This test will ensure that the engine is running properly.
ReferenceRefer to the Service Manual module Testing and Adjusting, "Torque Converter (Stall) - Test and Adjust" for the machine that is being serviced.
If the cycle time is slow for only one of the steering circuits, the circuit with slow cycle time should be tested for one of the following conditions:
- Leak in the circuit
- Control spool that is not shifting fully
Flow balance shims may need to be adjusted if the steering times are consistently slow in one direction.
ReferenceFor more information on testing and adjusting the main relief valve, refer to the Service Manual module Testing and Adjusting, "Steering Time - Check and Adjust" for the machine that is being serviced.