Repair manual

RD 27 Troubleshooting the Steering System
wc_tx001223gb.fm 83
6.2 Diagnosing the Steering System
Prerequisites  The hydraulic oil is warm
 207 bar (3000 psi) pressure gauge
 Large container
Procedure Perform the procedure below to diagnose the steering system.
1. Run the machine so that the hydraulic oil is at operating temperature,
approximately 43±5°C (110±10°F).
2. Stop the engine.
3. Remove the control panel (a) from the steering column.
4. Disconnect the hose (b) from the steering unit (c).
5. Place the hose (b) into a large container, or into a graduated container. To
reduce the risk of hydraulic system contamination, cap the port of the steering
unit after disconnecting the hose. Dispose of spilled hydraulic oil in accordance
with local environmental protection policy.
NOTICE: A large amount 18–24 L/min (4.7–6.0 gal/min) of hydraulic oil should
flow from the hose if the steering pump is functioning properly. Be prepared.
6. Run the engine for just 2 to 3 seconds and collect the flow from the hose.
Does hydraulic oil flow from the hose?
This procedure continues on the next page.
Yes ____ No ____
Continue. The steering pump has failed; replace it.