Troubleshooting - Kubota L4400 Workshop Manual

L4400 , WSM

1. TROUBLESHOOTING

Symptom
Tractor Can Not Be
Steered
Front Wheels
Vibration
Hard Steering
Steering Force
Fluctuates
Excessive Steering
Wheel Free Play
Front Wheels
Wander to Right or
Left
Noise
Wheel are Turned to
a Direction Opposite
to Steering Direction
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
Probable Cause
Steering controller broken
Pipe broken
Improper toe-in adjustment
Air in the hydraulic system
Improperly mounted wheels
Tie-rod end loose or worn
Front wheel hub bearing worn
Clearance between front axle center pivots and
bracket bushing excessive
Steering controller malfunctioning
Hydraulic pump malfunctioning
Overload
Transmission fluid improper or insufficient
Oil leak from pipe joint
Insufficient tire pressure
Steering controller malfunctioning
Relief valve malfunctioning
Air sucked in pump due to leaking or missing of
oil
Air sucked in pump from suction circuit
Steering controller malfunctioning
Air sucked in pump due to leak of oil
Air sucked in pump from suction circuit
Tire pressure uneven
Insufficient bleeding
Improper toe-in adjustment
Clearance between front axle center pivots and
brackets bushings excessive
Tie-rod end loose or worn
Steering controller malfunctioning
Air sucked in pump due to lack of oil
Air sucked in pump from suction circuit
Pipe deformed
Power steering hoses are connected in reverse
Replace
Replace
Adjust
Bleed
Change Wheels
Retighten or replace
Replace
Replace
Replace
Replace
–
Change or replenish
Retighten
Inflate
Replace
Replace
Replenish
Repair
Replace
Replenish
Repair
Inflate
Bleed
Adjust
Replace
Retighten or replace
Replace
Replenish
Repair
Replace
Reconnect steering
hoses
7-S1
STEERING
Reference
Solution
Page
7-S10, S11
–
6-S6
7-S10
–
6-S13
6-S11
6-S18, S23
7-S10, S11
7-S8, S9
–
G-8
–
G-49
7-S10, S11
7-S10, S11
–
–
7-S10, S11
–
–
G-49
7-S10
6-S6
6-S18, S23
6-S13
7-S10, S11
–
–
–
–
W1014322
KiSC issued 07, 2007 A