Buick LeSabre 1965 Service Manual page 141

CLUTCH, S-M TRANSMISSIONS
45000 CLUTCH 4 - 5
to replace the complete cover
assembly.
b. Lubrication of Clutch
1. Very sparingly apply wheel
bearing lubricant in pilot bushing
in crankshaft.
NOTE: If too much lubricant is
used, it will run out on face of
flywheel when hot and ruin the
driven plate facings.
2. Make sure that splines in the
driven plate hub are clean and
apply a light coat of wheel bear-
ing lubricant. Apply a light coat
of wheel bearing lubricant on
transmission drive gear splines.
Slide driven plate over trans-
mission drive gear several times.
Remove driven plate and wipe off
all excess lubricant pushed-up by
hub of plate.
NOTE: Driven plate facings must
be kept clean and dry.
3. Fill groove in throw-out bear-
ing with wheel bearing lubricant.
See Figure 4-5. Make sure trans-
mission front bearing retainer is
clean and apply a light coat of
wheel bearing lubricant. Slide
throw-out bearing over trans-
mission retainer several times.
Remove throw-out bearing and
wipe off all excess lubricant
pushed up by hub of bearing.
4. Clean and apply wheel bearing
lubricant to ball stud in flywheel
housing and to the seat in clutch
fork.
5. Check clutch pilot bearing for
excessive wear or damage. If re-
placement is necessary, remove
bearing with J-1448. For instal-
lation use Driver J-1522.
NOTE: Very s p a r i n g l y apply
wheel bearing lubricant in pilot
bushing. If too much lubricant is
used, it will run out on face of
flywheel when hot and ruin the
driven plate facings.
c. Inspection ot Clutch
Wash all metal parts of clutch,
except release bearing and driven
plate, in suitable cleaning solution
to remove dirt and grease. Soak-
ing release bearing in cleaning
solution would permit solution to
seep into bearing and destroy the
lubricant. Soaking driven plate in
cleaning solution would damage
the facings.
1. Flywheel and Pressure Plate.
Examine friction surfaces of fly-
wheel and pressure p l a t e for
s c o r i n g or roughness. Slight
roughness may be smoothed with
fine emery cloth, but if surface
is deeply scored or grooved the
part should be replaced.
2. Clutch Driven Plate. Inspect
driven plate for condition of
facings, loose rivets, broken or
very loose torsional springs, and
flattened cushion springs.
If facings are worn down near
rivets or are oily, the plate as-
sembly should be replaced. A
very slight amount of oil on clutch
facings will cause clutch grab and
chatter. A large amount of oil on
facings will cause slippage. Re-
moval of oil by solvents or by
buffing is not practical since oil
will continue to bleed from facing
material when hot.
When oil is found on driven plate
facings, e x a m i n e transmission
drainback hole, pilot bushing, en-
gine rear main bearing and other
points of oil leakage.
Test the fit of driven plate hub on
transmission main drive gear for
an easy sliding fit.
3. Bearings. Inspect clutch re-
lease bearing for scoring or ex-
cessive wear on front contact
face. Test for roughness of balls
and races by pressing and turning
front race slowly. Inspect main
drive gear pilot bushing in crank-
shaft. If bushing is rough or worn
it should be replaced.
Regardless of whether the old
FRONT FACING
(FLYWHEEL SIDE
Figure 4-4—Checking Driven Plate
For Run-Out
plate or a new one is to be in-
stalled, the plate s h o u l d be
checked for run-out. This check
can be made by sliding the driven
plate, front side first, over the
transmission main drive gear un-
til it is tight on the spline, then
setting up a dial indicator to bear
against the plate facing as shown
in Figure 4-4. W h i l e holding
firmly against front end of main
drive gear to take up play in main
drive gear bearing, slowly rotate
driven plate and observe the
amount of run-out shown by indi-
cator. If run-out of front facing
exceeds .025", the plate should
not be used since it is not prac-
tical to correct excessive run-out
by bending.
d. Installation of Clutch
1. If the pressure plate was dis-
assembled, follow Steps a and b.
a. Install the pressure plate in
the cover assembly, lining up the
groove on the edge of the pres-
sure plate with the groove on the
edge of the cover.
b. Install pressure plate retract-
ing springs and drive-strap to
pressure plate bolts and lock
washers and tighten to 18-25 ft.
lbs. torque. The clutch is now
ready to be installed.