Kubota M108S, Workshop Manual

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7-S1
M108S, WSM STEERING
1. TROUBLESHOOTING
W1014322
Symptom Probable Cause Solution
Reference
Page
Tractor Cannot Be
Steered Drive shaft in the steering controller improperly
assembled Reassemble 7-S10
Turning delivery hose damaged Replace 7-S8
Hard Steering Oil improper Change with
specified oil G-7
Hydraulic pump malfunctioning Replace 7-S6
Relief valve malfunctioning Replace 7-S5
Control valve (spool and sleeve) malfunctioning Repair or replace 7-S10 to 12
Oil leak due to seal damaged Replace –
Steering Force
Fluctuates Control valve malfunctioning Replace 7-S10 to 12
Air sucked in pump due to leaking or missing of
oil Replenish G-7
Air sucked in pump from suction circuit Repair –
Heavy Steering
Especially in the
Beginning of
Steering Control valve malfunctioning Repair or replace 7-S10 to 12
Steering Wheel
Turns
Spontaneously When
Released Control valve malfunctioning Repair or replace 7-S10 to 12
Front Wheels
Wander to Right and
Left Control valve malfunctioning Repair or replace 7-S10 to 12
Air sucked in pump due to lack of oil Replenish G-7
Air sucked in pump from suction circuit Repair –
Insufficient bleeding Bleed –
Cylinder malfunctioning Repair or replace 8-S12
Wheels Are Turned
to a Direction
Opposite to Steering
Direction Cylinder piping connected in reverse Repair 7-S9
Steering Wheel
Turns Idle in Manual
Steering Insufficient bleeding Bleed –
Air sucked in pump due to lack of oil Replenish G-7
Noise Air sucked in pump due to lack of oil Replenish G-7
Air sucked in pump from suction circuit Repair –
Pipe deformed Replace –
Oil Temperature
Increases Rapidly Relief valve malfunctioning Replace 8-S5
Front Wheels Vibrate Mechanical connections or wheel bearings worn Replace defective
parts –
KiSC issued 06, 2007 A