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4-6
CLUTCH
CLUTCH,
TRANSMISSION,.
UNIVERSAL JOINT
(134)
which
rotates
on the pin of a bracket attached
to
engine. The
outer end of equalizer rotates on
a ball st ud attached t
o
car frame. A spring and
tw
o
spring
seats inside
equalizer maintain
pres-
su
re
on the split
bearings
which
support
equal-
izer on stud ball. A
lubrication
fitting is in-
stalled on equ
alizer
and seals inclose both ends
to exclude dirt and
water.
See figure
4-5.
Th
e
inner arm of clutch release equalizer is
connected by
an
adjustable
rod t
o
the out er end
of the
release
yoke which is pivoted on a ball
st ud
located
in the
flywheel
hou
sing.
The yoke
is held on
the
ball st ud by a If
-shaped
spring
riveted to yoke. A boot around the yoke pro-
vide
s
a
flexible
closure for the yoke opening in
flywh eel
hou
sing.
The inner end of release yoke
is in
position
to push forward on the clutch re-
lease
bearing sleeve wh
en
clutch pedal is de-
pressed.
A
U-shaped
spring riveted to release
bearing sleeve holds bearing sleeve in contact
with yoke.
A coiled return spring is connected between
the clutch rel
ease
rod clevis pin and the trans-
missi on
shift idler
lever
pin to keep the clutch
release
bearing out of contact with the clutch
spring
(Series
40-50) or rel
ease
levers (Series
·
70) when clutch is engaged.
The clutch release bearing and sleeve assem-
bly
are mounted
upon a bearing support which
encircles the transmission main drive
gear.
The
bearing support is flared at the rear end to seat
in
flywheel
housing and is held in place by a
spring washer and the outer race of transmis-
sion main drive gear bearing. See figures 4-1
and 4-2.
Clutch release bearings and sleeves are serv-
iced as assemblies
only
and are
provided
with
lifetime lubricant at time of as
sembly.
Bear-
ings
for all series are identical in design except
that Series
40-50
bearings have rounded faces
which contact the clutch springs and Series 70
bearings have fiat faces which contact the re-
lease
levers. See
figure
4-6.
4-5 SERVICE RECOMMENDATIONS
a. Break-In of New Driven Plate Facings
Under no circumstances sh
ould
the
clutch be
harshly used on a new car or
immediately
af ter
installation of a new driven plate, flywheel, or
pressure plate. Sudden engagement of clutch
with engine running at abnormal speed, or con-
tinual slipping, may permanently injure driven
plate facings and may cause scoring of flywheel
and pressure plate. When these parts are new
SER IES
40
&
50
SERI ES
70
Figure
4
-6-Clutch
Release Bearings
,
they must be given moderate use for several
days until nicely
burnished.
b. Maintain Proper Clutch Pedal Lash
It is very important to maintain proper clutch
pedal lash at all times. The clutch pedal should
be checked occasionally to make certain that it
has
%0"
to 1" of free movement or lash when
clutch is fully engaged. Insufficient pedal lash
will cause pressure of release bearing against
the clutch spring (S
eries
40-50) or release lev-
ers (Series 70). This will cause abnormal wear
of clutch parts and also may
'
c a use clutch slip-
page if pressure is great enough t
o
prevent
positive engagement
of clutch.
See
paragraph
4-7 for clutch pedal
lash
adj ustment.
4-6 CLUTCH TROUBLE DIAGNOSIS
a. Excessive Pedal Pressure
The pressure required to depress clutch pedal
to toe board should not exceed 28 lbs. on Series
70 and 35 lbs. on Series 40-50. Excessive pedal
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