Troubleshooting - Kubota M6800S Workshop Manual

M6800 · M6800S · M8200 · M9000, 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 power steering body
improper assembled
• Pipe broken
• 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 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-S11, S12,
S13
–
G-11
7-S5, S6
7-S9
7-S11, S12,
S13
–
7-S11, S12,
S13
G-11
–
7-S11, S12,
S13
7-S11, S12,
S13
7-S11, S12,
S13
G-11
–
7-S8
7-S13 to
S16
–
7-S8
G-11
G-11
–
–
7-S9
–
W1014322
KiSC issued 03, 2008 A