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4-8
CLUTCH
CLUTCH, TRANSMISSION, UNIVERSAL JOINT
(136)
Figure 4-7-Clutch Pedal Adjustment
4-7
CLUTCH PEDAL LASH ADJUSTMENT
1. Make certain that the actuating spring
pulls clutch pedal firmly against pedal bumper
on toe board when pedal is released. If pedal is
not pulled against bumper, check pedal and
linkage for binding or lack of lubrication; also
check condition of actuating spring and make
sure that spring eye bolt is fully tightened. See
figure 4-7.
2. Check pedal free movement or lash by
pushing on pedal pad until release bearing con-
tacts clutch spring or release levers. Do not
mistake tension of pedal return spring as an
indication of lack of pedal lash. Free movement
or lash of clutch pedal should be %," to 1",
measured at pedal pad.
3. If adjustment is necessary, loosen lock nut
and turn adjusting nut on clutch release rod as
required to secure %," lash, then tighten lock
nut securely. See figure 4-7.
4-8 LUBRICATION OF CLUTCH
INTERNAL PARTS
Lubrication of clutch pedal and clutch release
equalizer is covered in Periodic Lubricare In-
structions (par. 1-1). Lubrication of internal
working parts is usually required only at time
clutch is assembled and installed;
however,
if
lubrication becomes necessary to eliminate
squeaks or correct excessive pedal pressure,
proceed as follows:
1. Remove flywheel lower housing. See fig-
ure 4-1 or 4-2.
2. Disconnect rod from clutch release yoke
and pull yoke outward to disengage it from ball
stud. Apply Lubriplate or Delco Brake Lubri-
cant to ball stud and ball seat in yoke, then
connect yoke to ball stud and release rod to
yoke.
3. Examine clutch release bearing sleeve to
see whether it is binding on release bearing
support due to improper installation. Lubricate
any contact point between bearing sleeve and
support by brushing with Lubriplate or Delco
Brake Lubricant.
4. On Series 40-50 clutch, brush a small
amount of Lubriplate or Delco Brake Lubricant
on clutch spring at points of contact with clutch
cover. On Series 70 clutch, brush lubricant on
pressure plate driving lugs where they contact
cover. In either case, work clutch pedal a num-
ber of times to work lubricant into contact
points.
5. On 1948 Series 70 clutch, rotate flywheel
until each release lever in turn is in lowest po-
sition, then very sparingly oil the release lever
pins and sides of release levers. Allow time for
any surplus oil to drain off before turning fly-
wheel, to avoid getting oil on driven plate fac-
ings. Release lever pins also may be lubricated
by spraying with powdered graphite, which
will not damage driven plate facings. This may
not afford immediate relief but if clutch is oper-
ated while engine is running, after installation
of flywheel lower housing, the graphite will
work into the bearing surfaces.
6. Install flywheel lower housing, making
sure that gasket is in condition to insure a
tight seal.
Figure 4-8-Correction of Pressure Plate Rattre-1948 Series 70
4-9 CORRECTION OF PRESSURE PLATE
RATTLE-SERIES 70
This correction is for rattle which occurs
only when engine is intermittently accelerated
with clutch disengaged. See paragraph 4-6 (sub-
par. b.).
1. Remove flywheel lower housing. Depress
clutch pedal and check clearance between pres-
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