Troubleshooting - Kubota M108S Workshop Manual

M108S, WSM

1. TROUBLESHOOTING

Symptom
Tractor Cannot Be
Steered
Hard Steering
Steering Force
Fluctuates
Heavy Steering
Especially in the
Beginning of
Steering
Steering Wheel
Turns
Spontaneously When
Released
Front Wheels
Wander to Right and
Left
Wheels Are Turned
to a Direction
Opposite to Steering
Direction
Steering Wheel
Turns Idle in Manual
Steering
Noise
Oil Temperature
Increases Rapidly
Front Wheels Vibrate
Probable Cause
Drive shaft in the steering controller improperly
assembled
Turning delivery hose damaged
Oil improper
Hydraulic pump malfunctioning
Relief valve malfunctioning
Control valve (spool and sleeve) malfunctioning
Oil leak due to seal damaged
Control valve malfunctioning
Air sucked in pump due to leaking or missing of
oil
Air sucked in pump from suction circuit
Control valve malfunctioning
Control valve malfunctioning
Control valve malfunctioning
Air sucked in pump due to lack of oil
Air sucked in pump from suction circuit
Insufficient bleeding
Cylinder malfunctioning
Cylinder piping connected in reverse
Insufficient bleeding
Air sucked in pump due to lack of oil
Air sucked in pump due to lack of oil
Air sucked in pump from suction circuit
Pipe deformed
Relief valve malfunctioning
Mechanical connections or wheel bearings worn
Reassemble
Replace
Change with
specified oil
Replace
Replace
Repair or replace
Replace
Replace
Replenish
Repair
Repair or replace
Repair or replace
Repair or replace
Replenish
Repair
Bleed
Repair or replace
Repair
Bleed
Replenish
Replenish
Repair
Replace
Replace
Replace defective
parts
7-S1
STEERING
Reference
Solution
Page
7-S10
7-S8
G-7
7-S6
7-S5
7-S10 to 12
–
7-S10 to 12
G-7
–
7-S10 to 12
7-S10 to 12
7-S10 to 12
G-7
–
–
8-S12
7-S9
–
G-7
G-7
–
–
8-S5
–
W1014322
KiSC issued 06, 2007 A