5-10t Internal Combustion Counterbalance Forklift Truck Operation & Maintenance Manual
Table 6-2 Continued
Failure Cause of Generation Effect Removal Method
Leaf Spring Broken
Steering wheel fails to return to middle
position automatically, and the pressure
drop at middle position is increased.
Damaged leaf spring to
be replaced
Poking Pin Broken or
Distorted
Pressure oscillation is obviously
increased, and the steering wheel even
fails to rotate.
Poking pin to be
replaced
Opening of Universal
Driving Shaft Broken
or Distorted
Pressure oscillation is obviously
increased, and the steering wheel even
fails to rotate..
Universal driving shaft
to be replaced
Mutual Positions of
Rotor and Universal
Driving Shaft
Misloaded
Oil distribution relationship is in disorder,
and the steering wheel rotates by itself or
swings leftward or rightward.
To be reassembled
according to Notices (e)
for Assembly
Steering
out of
Order
Two-way Overload
Valve out of Order
(Steel Ball Blocked
with Dirt or Spring out
of Order)
The truck runs out or the cylinder stays
motionless, (may possibly move slowly
as well) when steering wheel is turned.
Two-way overload valve
to be cleaned
Failure of
Steering
Wheel For
Automatic
Return to
Middle
Position
(1)Steering Column
and Valve Core
Eccentric
(2)Axial Jam-up of
Valve Core by Steering
Column
(3)Rotating Resistance
for Steering Column
too Strong
(4)Leaf Spring Broken
The pressure drop at middle position is
increased or the steering wheel is not
relieved when rotation stops (Vehicle to
run out).
To be removed based on
cause for failure
generation
Manual
Steering
Not
Available
Radial Clearance and
axial clearance of rotor
and stator too large
During power steering operation, the
piston of cylinder is at extreme position,
and the driver has an unclear feeling of
destination. During manual steering
operation, the steering wheel rotates,
while the cylinder stays still.
Rotor and stator to be
replaced
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