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
9803/3280
Section G
10 - 3
Issue 1
Fault Finding
