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4-6
CLUTCH
CLUTCH, TRANSMISSION, UNIVERSAL JOINT
(
134)
which r
ot ates
on the pin of a bracket attached
to
engine.
The outer end of equalizer rotates on
a ball stud attached to car fram
e.
A spring and
two spring seats inside equalizer maintain pres-
sure on
t
he split bearings which support equal-
izer on stud
ball.
A lub
rication
fitting is in-
st alled on equ
alizer
and seals inclose both ends
t
o
exclude dirt and
water.
See figure
4-5.
The inner arm of clutch release equalizer is
connected by
an
adjustable
rod to the out er end
of the
release
yoke which
is
pivoted on a ball
st ud
located
in the
flywheel housing.
The yoke
is
held on the ball stud by a U-shaped spring
riveted
to yoke. A boot around the yoke pro-
vides a flexible closure for the yoke opening in
flywheel
housing.
The inner end of release yoke
is in
position
to push f
orward
on the clutch re-
lease bearing sleeve when clutch pedal is de-
pressed .
A
U-shaped
spr ing riveted to release
bearing
sle
eve
holds bearing sleeve in contact
with yoke.
A coiled return spring is connected between
the clutch
release
rod clevis pin and the trans-
mission shift idler lever pin to keep the clutch
release
bearing
out of contact with the clutch
spring (S
eries
40-50) or r
elease
lev
ers
(Series
70) wh
en clutch
is engage d.
The
clutch
release
bearing
and sleeve assem-
bly are
mounted
upon a
bearing
support which
encir cles th
e
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 onl
y
and are provided with
lifetime lubricant at time of
assembly .
Bear-
ings for all ser ies are identical in
design
except
that
Series 40-50
bearings have rounded faces
which contact the clutch springs and Ser ies 70
bearings have flat 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
th
e clutch be
harshly used on a new ca r or
immediately
af t er
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
SE
RIES
40
&
50
SERIES
70
Figure
4-6-Clulch 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
3
4"
to 1" of free movement or
lash
when
clutch is full
y
engaged. Insufficient pedal lash
will cause pressure of release bearing against
the clutch spring (Series 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
preven t
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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