STEERING
STW34, STW37, STW40, WSM
7-S1
1. TROUBLESHOOTING
Symptom
Probable Cause and
Checking Procedure
Solution
Reference
Page
Tractor Can Not Be
Steered
1. Steering controller is
damaged.
Replace steering controller. 7-S8
2. Steering hose is damaged. Replace steering hose. 7-S8
Hard Steering 1. Hydraulic pump is
damaged.
Replace hydraulic pump. 8-S14
2. Tractor is operated in
overload condition.
Operate the tractor in proper conditions.
Attach the proper implements to the
tractor.
–
3. Transmission fluid is
improper or insufficient.
Change or fill transmission fluid. G-8
4. Power steering oil leaks
from pipe joint.
Retighten pipe joint. 7-S8
5. Tire pressure is
insufficient.
Inflate tire pressure. G-50
6. Steering controller is
damaged.
Replace steering controller. 7-S8
7. Power steering relief valve
is damaged.
Replace steering controller. 7-S8
Steering Force
Fluctuates
1. Air is sucked in pump due
to leaking or missing of oil.
Fill transmission fluid.
Bleed air from the hydraulic system by
steering the steering wheel to the end for
two or three times.
G-8
2. Air is sucked in pump from
suction circuit.
Repair suction circuit.
Bleed air from the hydraulic system by
steering the steering wheel to the end for
two or three times.
7-S5
Excessive Steering
Wheel Free Play
1. Steering controller is
damaged.
Replace steering controller. 7-S8
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