941
Model Code Page
61. Steering system
15. 5. 1993
6000--8750 610 13
8. 11. 1990
Fault tracing chart
Before disconnecting the pipes, hoses and hydraulic components it is most important that the units, as well as the adjacent parts,
should be carefully cl eaned. Use white spirit or a similar solvent. Also remove paint from the pipe fittings, couplings etc.
Open ports, hose and pipe ends must be plugged immediately after they are exposed, in order to prevent dirt from getting into
the system.
Never use teflon when assembling the system. Traces of teflon can get into the system and cause problems.
Before examining the steering system for particular malfunctions, the fluid l e vel should be checked and the whole system bled
if necessary. Where applicable, check that the fluid system is not blocked. It is also important to make sure that the correct type
of hydraulic fluid is used, see the oil recommendations.
Fault
Probable cause Remedy
The steering wheel is hard to turn,
but the steering is otherwise normal
1. No hydraulic pressure. The pump or the
pump drive faulty
2. Non---return valve (3 fig. 5) leaking or ball in
wrong position.
3. Pressure---limiting valve jammed in open
position
4. Considerable friction in the mechanical parts
of the steering system.
Repair the fault
Replace the ball or check its position
Repair the pressure---limiting valve (or
clean it)
Lubricate the steering system bearings
and joints, repair if necessary. Check the
steering column clearance
Continual correct ion of the steering
wheel is necessary. The steering
wheel will not assume a neutral
position.
1. Leaf springs have no force or are broken
2. Steering column and steering valve are not in
line.
3. Too little play or no play at all between the
steering column and the c onnecting piece.
Change the leaf springs
Line up the steering column with thecentre
line of the steering valve
Adjust the clearance
The steering wheel will not assume
the neutral position, tends to turn it-
self=motor effect)
1. Dirt, burrs or swarf between the inner and
outer slides.
2. Jamming between the inner and outer slides
caused by too high fluid pressure
3. Leaf springs broken or have no spring pres-
sure.
If possible clean the slides, otherwise
change the complete housing or the whole
steering valve
Clean the whole steering system
Adjust the pressure---limiting valve to the
prescribed pressure
Change the leaf springs
Roadwheelsturninthewrongdi-
rection
1. Hoses to steering cylinder are reversed
2. Wrong setting of rotor shaft or rotor set, see
figure
Change the hoses round
Correct the setting
Steering force too low (or only to
one side)
1. Steering pressure too low
2. Worn seal on steering cylinder piston
3. Too lar ge internal l e akage in steering valve
4. Shock valve faulty
5. Abnormal superstructure for use of machine
Correct the pump pressure of the pressur-
e---limiting valve
Change the piston seal
Change o r recondition the steering valve
Recondition shock valve
Compare with machine of standard ver-
sion
Abnormally large ”play” in steering
wheel
1. Groove for cross pin worn or broken
2. Play in universal joint o n steering column
3. Leaf springs broken or have no spring force
Change rotor shaft
Change the universal joint
Change the leaf spring
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