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Problem
Slow or hard steering
Constant steering to
maintain straight travel
Slow
steering
wheel
movement will not cause
any frame movement
Steering wheel can be
turned with frames against
steering stop
Steering wheel turns with
no resistance and causes
no frame movement
Cause
Too much friction in the mechanical parts of
the machine
Cold oil
Low priority valve pressure setting
Worn hydraulic pump
Sticking priority valve spool
Broken priority valve spring
Air in system
Leakage in steering system
Worn steering unit
Leaf spring without spring force or broken
Spring in double shock valve broken
Gear wheel set worn
Cylinder seized or piston seals worn
Leakage in steering unit gerotor
Worn steering unit gerotor
Leakage in steering system
Broken steering column or splined coupling
Lack of oil in steering unit
Leakage in steering system
Lubricate bearings and joints of steering
column or repair if necessary.
Check steering column installation.
Warm the hydraulic oil.
Do priority valve pressure test.
Clean or replace cartridge in steering valve.
Do hydraulic pump performance check.
Remove and inspect.
Remove and inspect.
Check for foamy oil.
Do steering system leakage check.
Do steering system leakage check.
Do steering unit neutral leakage test in
group 3.
Replace leaf springs.
Replace shock valve.
Replace gear wheel set.
Replace defects parts.
Do steering system leakage check.
Do steering leakage check.
Do steering system leakage check.
Remove and inspect.
Start engine and check steering operation.
Do steering system leakage test in group 3.
5-12
Remedy
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