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SEN03849-00
H-10 The brake does not work or does not work well
Ask the operator about the following:
Has the brake come not to work suddenly?
q
o
Breakage of brake equipment
Has the brake come not to work gradually?
q
o
Wear of lining and disc, defective seal
Inspection before diagnosis
Is the oil level in the hydraulic tank appropriate?
q
Is the play of brake pedal appropriate?
q
Oil leak from brake tube and connector, deformation of
q
tube.
Tire air pressure and state of tire tread.
q
Check abnormality
Measure the braking force and check referring to the stan-
q
dard value table if the brake does not work practically.
No.
Diagnosis
1
When the brake pedal is stepped on, only a little resistance is felt
2
When the brake pedal is stepped on, a strong resistance is felt
When the brake works, an abnormal noise occurs from the axle
3
brake
When the four wheels are jacked up, the axle is placed on a table
4
and the brake is applied at the first forward speed, only a specific
wheel rotates
An airflow is observed in bleeding air from brake circuit, and the
5
brake returns to normal after the bleeding
6
Brake oil leaks abnormally from the axle during inspection
7
Much metal powders are mixed in the axle oil
The brake pedal leg-power and stroke are normal, but the brake
8
does not work well
9
The brake does not work often when the engine is stopped
10 The accumulator is not charged, and a buzzer sounds
11 The brake works after some time lag
16
40-500
500 Troubleshooting of hydraulic and mechanical system (H-mode)
H-10 The brake does not work or does not work well
a
E
Remedy
X
Q
Q
Q
Q
Cause
b
c
d
e
f
g
E
E
E
E
X
X
X
X
X
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
WA250, 250PZ-6
1
h
i
j
k
E
E
X
X
X
A
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
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