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POSSIBLE CAUSES
TROUBLE: Erratic steering
Air in system due to low oil level, cavitating pump,
leaky fittings, pinched hose, etc.
Loose steering cylinder piston
TROUBLE: Free wheeling - steering wheel turns freely with no back pressure. Front wheels do not steer.
Splines of steering column/steering control unit cou-
pling may be disengaged or damaged
No flow to steering control unit; can be caused by:
1. Low oil level
2. Ruptured hose
3. Broken steering control unit gerotor drive pin
TROUBLE: Excessive free play at steered wheels
Broken or worn linkage between steering cylinder and
steered wheels
Leaky steering cylinder seals
TROUBLE: Binding or poor centering of steered wheels
Binding or misalignment in steering column or splined
coupling and steering control unit
High back pressure in tank can cause slow return to
center. Should not exceed 300 psi (2068 kPa)
Large particles can cause binding between the spool
and sleeve in the steering control unit
TROUBLE: steering control unit locks up
Large particles in meter section
Insufficient hydraulic power
Severe wear and/or broken pin
L6-24
Correct condition and add oil as necessary.
Repair or Replace steering cylinder.
Repair or replace steering column or coupling.
1. Add oil and check for leakage.
2. Replace hose.
3. Repair or replace steering control unit.
Check for loose fitting bearings at anchor points in
steering linkage between cylinder and steered wheels.
Repair or Replace steering cylinder.
Align column to steering control unit.
Remove restriction in the lines or circuit. Check for
obstruction or pinched lines, etc.
Clean the steering control unit and filter the oil. If
another component has malfunctioned generating
contaminating materials, flush the entire hydraulic sys-
tem.
Clean the steering control unit.
Check hydraulic system pressure.
Repair or replace steering control unit.
Steering Circuit Component Repair
SUGGESTED CORRECTIVE ACTION
L06021
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Table of Contents
Troubleshooting
