10 - 3
FAULT
K Poor braking when hot.
L Excessive brake noise in operation.
Note: Due to the metal to metal contact
of oil immersed brakes, limited noise
can be heard which is consistent with
this type of design - this is normal.
M Fluid loss when machine standing,
for instance - overnight (see note).
Note: Confirm fault is as indicated by
checking that the pedals DO NOT touch
floor under constant pressure.
POSSIBLE CAUSE
1 Moisture in system vapourizing
when axle is hot.
1 Deterioration of axle oil or wrong
type of axle oil.
2 Axle oil loss.
3 Friction plates worn beyond limits.
4 Friction/counter plates in poor
condition.
1 Slight cut or nick in the brake
piston seal, refer to Service
Procedures - Brake Piston Seal
Leakage Test.
ACTION
1 Strip axle and clean annular piston to
remove moisture. Remove master
cylinders and check for corrosion,
service as required. Flush hydraulic
brake system.
1 Change axle oil.
2 Refill axle with correct oil and check
for leaks.
3 Renew friction/counter plates.
4 Check for distortion or surface
pitting and/or roughness of
friction/counter plates (annular
grooving of counter plates is
acceptable).
1 Strip axle, replace seal.
Section G Brakes
9803/7130
Section G
10 - 3
Issue 1
Fault Finding
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