Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
Needed Tools     | ||
---|---|---|
Part Number     | Part Description     | Qty     |
177-7860     | Hose Assembly     | 1     |
6V-4144     | Coupler     | 1     |
6V-4142     | Nonvalved Nipple     | 1     |
8T-0856     | Pressure Gauge 6000 kPa (870 psi)     |
1     |
- Lower the work tool to the ground.
- Stop the engine.
- Engage the parking brake.
- To release any steering system pressure, turn the steering wheel to the left and to the right .
- Remove panel (1) from the right side of the machine.
Illustration 1 | g00634079 |
924G and 924Gz |
Illustration 2 | g00906192 |
928G and IT28G |
- The pressure reducing valve is behind panel (1) . Pressure tap (2) is on the pressure reducing valve. Remove the cap from pressure tap (2) .
Illustration 3 | g00634049 |
924G and 924Gz (2) Test port for steering pressure |
Illustration 4 | g00906194 |
928G and IT28G (2) Test port for steering pressure |
- Attach the 6V-4144 Coupler on the hose to pressure tap (2) on the pressure reducing valve.
- Start the engine.
- Run the engine at HIGH idle. Do not move the steering wheel.
The pressure should be 4065 ± 205 kPa (590 ± 30 psi).
Do not adjust the steering piston pump because of the result of this test. If the results are not acceptable, then perform the test for the pump high-pressure stall on the steering pump. If the pressure is correct, remove the hose and gauge. Place the cap on pressure tap (2) . Attach panel (1) .