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Section H
10 - 3
Fault
Machine will not turn when the
3
steering wheel turned (continued).
Steering fails to respond to
4
selected mode (4WS Machines only)
9803/3280
Fault Finding
Probable Cause
Priority valve not operating
correctly
Steer mode valve not operating
correctly (4WS Machines only)
Mechanical failure
Steer column splined shaft not fully
engaged in steer valve.
Power track rod failure
Selector switch faulty
Proximity switches not operating
correctly
Steer mode valve not operating
correctly
Leaks in the relevant hoses or
component connections
Electrical failure
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Steering
Section H
10 - 3
Action
Check if the priority valve
is st ic k ing , rec t if y as
required.
Check the load sense line
from the steer unit to the
priority valve for signs of
leak ing
o r
p o o r
connection.
Check if spools sticking,
rectify as required
Chec k
if
so leno id s
o p erat ing ,
rep lac e
solenoids as required
Check for damaged axle
c o m p o nent s, suc h as
rams, trackrods, linkages
etc.
Check shaft
engagement.
Check power track rod for
signs of damge, leaks etc.
Check selector switch,
replace as required
Check setting of
Proximity switches, reset
or replace switches as
required.
Check if spools sticking,
rectify as required
Chec k
if
so leno id s
o p erat ing ,
rep lac e
solenoids as required.
Check hoses and
connections for leaks
Check relevant electrical
c onnec t ors, if p rob lem
still persists, do a wiring
c o nt inuit y
c hec k
o n
relevant circuits.
Issue 1
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