Edition 2 Chapter 2 Page 2-13
Feb/2013 Troubleshooting
2.10 STEERING SYSTEM
Table 2-10
Part Problem Cause Remedy
Steering System
Hard steering
a) Oil level in the hydraulic system
is too low or the oil has a low
viscosity (causes low pressure or
air in the system (cavitations)).
Examine oil level in
hydraulic tank, add oil
as necessary. Use the
correct type. Examine
sealing performance of
pipe fittings
b) Park brake is engaged Examine and
disengage the park
brake
c) Steering system pressure is not
sufficient.
Make sure that the
relief valve pressure is
not too low
d) Relief valve core blocked Clean valve core
e) Priority valve defective Clean valve core
f) Oil pipe fittings leak, pipeline
blocked or twisted
Examine, clean or
replace pipelines and
fittings
g) Filter blockage, causing
unsatisfactory cleanliness and
decreased flow
Clean filter and filter
element,replace oil
h) Dangerous leaks and damage in
the steering gear
Repair or replace seal
ring
i) Steering cylinder leaks internally Replace seal ring
Hard rapid
steering
a) Oil supply from the oil pump is
not sufficient (low flow)
Repair oil pump
b) Oil pump suction pipeline weak
and collapsed (flat)
Replace pipelines
c) Heavy oil leaks at the two sides
of piston in the steering gear
caused by oil damage or too
much abrasion
Replace oil seal
d) Air is inhaled
Examine all pipe
fittings
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