H-8 Steering Wheel Shakes Or Jerks; H-9 Machine Deviates Naturally To One Side When Traveling - Komatsu WA250-6 Shop Manual

500 Troubleshooting of hydraulic and mechanical system (H-mode)

H-8 Steering wheel shakes or jerks

H-8 Steering wheel shakes or jerks
Checks before troubleshooting
Is the hydraulic oil level correct? Is the type of oil correct?
q
Is there any play in the center hinge pin bearing or steering cylinder pin or
q
bushing?
Is there any variation in the tire inflation pressure?
q
Is the steering wheel play correct?
q
Check for abnormalities
Operate at a safe place and check how the steering wheel shakes and under
q
what conditions.
a
In cases where the steering wheel is heavy but does not shake, go to "H-7 The
steering wheel is heavy".
No.
Diagnosis
1 Chassis shakes when traveling on rough road surface
2 Shakes when steering is suddenly turned during operation or travel
Chassis shakes when accelerating during travel operations
3
Chassis shakes when engine is started
4
5 Excessive shock when steering wheel is turned back

H-9 Machine deviates naturally to one side when traveling

Causes: Defective steering
Defective operation of safety valve
q
Oil leakage inside steering cylinder
q
Variation in tire inflation pressure
q
WA250, 250PZ-6
SEN03849-00
Cause
Valves Cylinder Valves
a b c
E E
Remedy
X X X
Q Q
Q Q Q
Q Q
Q
40-500
1
d
E
X
Q
Q
Q
1
15