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PART
5-2-GENERAL CLUTCH SERVICE
5-9
DIAGNOSIS GUIDE -
CLUTCH (Continued)
TROUBLE SYMPTOMS
CLUTCH NOISY WHEN
DISENGAGED ENGINE
RUNNING
CLUTCH SPIN OR DRAG
POSSIBLE CAUSES
1. Pilot bearing worn.
2.
Release bearing worn.
1. Failed or worn pressure plate.
2. Grease on linings of clutch
disc.
3. Flywheel housing out of align-
ment.
4. Damaged clutch disc.
5. Lack of fluid.
6. Air in hydraulic system.
7. Clutch disc fitted in reverse.
8. Uneven centre drive plate re-
lease (twin plate clutch only).
9. Binding of the disc on the
input shaft splines.
EJ
FLYWHEEL HOUSING ALIGNMENT
Alignment of the flywheel hous-
ing
bore
and
rear· face with the en-
gine
should
be checked as a possible
cause of any of the following troub-
les:
excessive
transmission
gear
wear,
transmission jumping
out of
gear,
especiall~·
top
gear,
drive
line vibration, excessive pilot bush-
ing wear,
noisy release bearing, or
excessive
clutch
spin
time.
INSPECTION
1.
Wrth tht!
clutch release
bear-
ing removed, install
the
indicator·
pilot
tool shown in
Fig. 1.
2.
Clean the
faces of the fly-
wheel
housing bolt bosses, and re-
move all
burrs, nicks, and paint
MAXIMUM FACE
RUN OUT+ 0.009 INCH
from
the
mounting
face
of the
housin~·.
3.
Install the dial indicator on
the pilot and adjust the holder so
the button will
contact
a circumfer-
~nce
just inside of the transmission
mounting· holes (Fig-.
1 ).
4.
Push the flywheel forward to
l'emove
crankshaft end play. Set
the dial indicator face to read zero.
5.
Remove the spark plugs to
alleviate compression.
(i.
While
for·cing
the
flywheel
for·ward,
rotate
the
crankshaft
through one
revolution and
note
-
-
-
MAXIMUM NEGATIVE BORE RUN OUT 0.0151NCH Cl017·C
FIG. 1 -
Flywheel Housing Alignment Check
CORRECTION
1. and 2. Replace bearing.
1. Replace pressure plate.
2. Replace clutch disc and de-
grease pressure plate and flywheel.
3. Align to specifications.
4. Replace clutch disc.
5. Rectify cause of fluid loss,
refill and bleed system.
6. Bleed system.
7. Fit clutch disc correctly, if
damaged replace.
8. a. Dismantle clutch assembly
and clean thoroughly with particular
attention to adaptor drive lugs.
b. Check centralising springs for
even height, reset if necessary.
9. Check splines for burrs, rust-
ing and damage. Clean up splines
or replace input shaft.
Lubricate spline .with Molybond
122L Dry Spray Lubricant.
the
point
of
maximum
runout.
Mark runout on the face of hous-
ing.
7.
Position the dial indicator to
check bore alig·nment (.Fig.
1).
The
bore must be clean and free
of
burrs, nicks and paint.
8.
Pull the crankshaft through
one revolution. Note the indicator
reading and
mark
the
maximum
point of runout on
the
face of the
housing.
9.
Remove
the
dial
indicator
from the crankshaft
and the houa-
ing.
CORRECTION
ENGINE IN CAR
Since any change in face align-
ment will change bore alignment,
it may be possible to correct bore
alignment by changing face align-
ment.
Face
alignment
can
be
changed by shimming between the
flywheel housing and
~ngine.
Fig.
2 shows the type of shim which can
be fabricated.
Not more than 0.010 inch thick-
ness shims may be used between
the flywheel housing
and
engine.
lf a 0.010-inch shim will not bring
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