H-18
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
Air in system due to low level Correct condition and add fluid.
of oil, cavitating pump, leaky
fitting, pinched hose, etc.
Loose cylinder piston. Replace cylinder.
Thermal shock damage. * Replace steering control unit.
Sticking flow control spool. Replace flow control valve.
Air in hydraulic system. Most Bleed air out of system. Placing
likely air trapped in cylinders ports on top of the cylinder will
or lines. help prevent air trapping.
Low fluid level. Add fluid and check for leaks.
Steering control unit meter has Usually starting engine will cure
a lack of oil. This can happen problem.
on start-up, after repair, or long
periods of non use.
No flow to steering unit can be
caused by:
1. Low fluid level. Add fluid and check for leaks.
2. Ruptured hose. Replace hose.
3. Internal steering control unit Replace the unit.
damage due to thermal
shock*.
Leaking relief valve Repair or replace the accessory
in cylinder lines. valve.
Piston seal blown out. Determine cause. Correct and
replace seal.
Loose steering wheel nut. Tighten the nut.
Steering column shaft worn or Repair or replace steering wheel
damaged. There should be very connection or column.
little free play in the unit itself.
9. TROUBLE SHOOTING (Contd.)
TROUBLE PROBABLE CAUSE REMEDY REF.
F. Erratic
steering
G. “Spongy” or
soft steering
H. Free Wheeling
- Steering
wheel turns
freely with no
feeling of
pressure and
no action on
steered
wheels.
I. Free Wheeling
- Steering
wheel turns
with slight
resistance but
results in
little or no
steered wheel
action.
J. Excessive
free play at
steering
wheel.
Steering
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