SEN03849-00
WA250, 250PZ-6 40-500 17
500 Troubleshooting of hydraulic and mechanical system (H-mode)
H-11 The brake is not released or is dragged
H-11 The brake is not released or is dragged 1
Ask the operator about the following:
q Has the brake pedal returned completely?
q Is the parking brake released completely?
Check abnormality
q Abnormal heat of brake.
q Does the machine travel smoothly inertia on a level ground?
Cause
abcd
Defective brake piston seal in axle
Defective operation of brake piston in axle
Defective slack adjuster
Wear or abnormality of brake lining in axle
No.
Remedy
Diagnosis
E
X
E
X
E
X
E
X
1 The brake pedal is released, but the brake is still applied
QQQQ
2
When the brake pedal is released, oil is drained from the air bleeder, the circuit oil pressure
drops and the brake is released
QQ
3
When the four wheels are jacked up, the axle is placed on a table, the engine is stopped, the
parking brake is released and the tires are rotated by hand but a specific tire hardly rotates
QQQ
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