POSSIBLE CAUSES SUGGESTED CORRECTIVE ACTION
TROUBLE: Steering wheel oscillates or turns by itself
Lines connected to wrong ports
Parts assembled wrong. steering control unit improp-
erly timed.
Check line routing and connections.
Reassemble correctly and retime control valve.
TROUBLE: Steered wheels turn in opposite direction when operator turns steering wheel
Lines connected to wrong cylinder ports Inspect and correct line connections.
(Steering Pump)
TROUBLE: No pump output
Air trapped inside steering pump
Broken pump drive shaft
Excessive circuit leakage
No oil to pump inlet
Bleed air from pump and/or system.
Inspect hoist and steering pump, replace drive shaft.
Check for external leaks, internal system pressure
loss.
Check hydraulic tank oil level. Make certain pump inlet
shut-off valve is open.
TROUBLE: Low pump output
Low pump pressure
Internal pump wear
Restricted inlet
Insufficient oil supply
High pressure filter restricted
Check unloader valve operation and adjust pressure if
necessary. Check compensator adjustment pressure.
Check system relief valves.
Repair or replace steering pump.
Make certain shut-off valve is open. Check suction
hose. Clean tank strainers.
Check hydraulic tank oil level. Make certain shut-off
valve is open.
Replace filter element.
L06021 Steering Circuit Component Repair L6-25
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