CLUTCH
SYMPTOM
5.
Rattle.
6.
Tick or
Knock.
7.
Fracture
of Driven
Plate.
8.
Abnormal
Facing
Wear.
CAUSE
(c)'
Pressure plate out of parallel
with flywheel face in excess of
of permissible tolerance.
(d)
Contact area of friction facings
not evenly distributed. Note that
friction facing surface will not
show
100%
contact until the
clutch has been in use for some
time, but the contact area actu-
ally showing should be evenly
distributed round the friction
facings.
(e)
Bent splined shaft or buckled
driven plate.
(f)
Unstable or ineffective rubber
engine mountings.
(a)
Damaged driven plate,
i.e.,
bro-
ken springs, etc.
(b)
Worn parts in release mechanism.
(c)
Excessive back lash in transmis-
sion.
(d)
Wear in transmission bearings.
(e)
Bent or worn splined shaft.
Cf)
Ball release bearing loose on
operating sleeve.
(a)
Hub splines badly worn due to
misalignment.
(b)
Worn pilot bearing.
(a)
Misaligment distorts the plate
and causes it to break or tear
round the hub or at segment necks
in the case of Borglite type.
(b)
If the gearbox during assembly
be allowed to hang with the shaft
in the hub, the driven plate may
be distorted, leading to drag,
metal fatigue and breakage.
Usually produced by overloading and
by the excessive slip starting
associated with overloading.
REMEDY
Re-adjust levers in plane
and,
if
necessary,
fit
new
eyebolts.
This may be due to distor-
tion, if so fit new driven
plate assembly.
Fit new shaft or driven plate
assembly.
Replace and ensure elimina-
tion of
endwise movement
of power unit.
Fit new parts as necessary.
Check and correct align-
ment, then
fit
new driven
plate.
Pilot bearing should be re-
newed.
Check and correct alignment
and introduce new driven
plate.
Fit new driven plate assem-
bly and ensure satisfactory
re-assembly.
In
the hands of the operator.
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