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Section G
10 - 2
FAULT
Pulling to one side when pedals
G
locked together (cont'd).
H
Poor braking (not pulling to one
side).
One or both brakes not releasing.
J
9803/3280
Fault Finding
POSSIBLE CAUSE
2
Braking system inoperative on
one side.
3
Friction plates worn beyond limits
or distorted on one side.
4
Badly adjusted push rods.
5
Servo
operating
adjustment.
6
Annular piston fault (see item J6).
1
Friction plates worn beyond limits
or distorted on one side.
2
Master cylinder fault.
3
Annular piston fault (see item J6).
4
Incorrect/low axle oil.
5
Vacuum failure (machines fitted
with servo assisted brakes only).
1
Brake pedal spring fault.
2
Master cylinder fault (plunger
stuck in bore).
3
Blocked hole in master cylinder
reservoir cap.
4
Brake pedal free travel incorrect.
5
Fluid contamination/seal damage.
6
Annular brake piston(s) binding in
axle.
7
Kinked or crushed brake pipes.
8
Friction/counter plates not free on
splines and/or dowels.
Purchased from www.WorkshopManuals.co.uk
Brakes
ACTION
2
3
4
rod
out
of
5
6
1
2
3
4
5
1
2
3
4
5
6.1 Check that correct brake fluid has
6.2 Check if annular brake piston seals
6.3 Check that annular brake piston
6.4 Check that the annular brake piston
7
8
Section G
Unlatch pedals to test circuits
individually.
Renew friction/counter plates -
BOTH sides.
Adjust push rod (1mm minimum).
Adjust servo operating rod.
See item J6.
Renew friction/counter plates -
BOTH sides.
Check master cylinder in single and
coupled pedal modes to identify fault
area, service as required.
See item J6.
Fill axle with correct type of oil.
Inspect
vacuum
source/pipes,
service as required.
Fit a new spring.
Service as required.
Fit a new reservoir cap.
Adjust pedal free travel.
Flush system and renew hydraulic
seals.
been used (incorrect fluid could swell
the annular brake piston seals).
in good condition.
rotates freely in its housing with no
seals fitted.
seal
retracts
the
approximately 0.5mm (0.020 in).
Check and renew pipes as required.
Check friction/counter plates for free
movement, replace if required -
BOTH sides.
10 - 2
piston
Issue 1
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