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CLUTCH,
TRANSMISSION, UNIVERSAL
JOINT
SECTIO N 4-8
CLUTCH
CONTENTS OF SECTION 4-B
CLUTCH
4-3
Paragraph
Subject
Page
Paragraph
Subject
Page
4-4
Clutch Description and Opera-
40
-50
.
. ..
.
.
. ...
. .. . .
..
.
. . .
.
4-9
tion .
. .
.
. .
. .
. . ..
.
. . . . . . . . .
.
.
4-3
4-12
Disassembly of
Clutch-1948,
4-5
Service Recommendations
.
. .
.
4-6
Series 70
..
.. ......
..
.
... ..
. 4-9
4-6
Trouble Diagnosis
...
..
.
..
. . . 4-6
4-13
Cleaning and Inspection of
4-7
Clutch Pedal Lash Adjustment 4-8
Clutch Parts-All Series
.
.
.
. . .
4-10
4-8
Lubrication of Clutch Internal
4-14
Assembly
of
Clutch-Series
Parts
.
.
....
. . ..
...
. ..
..
..
.. 4-8
40-50
.
...
.
..
. . . . .
..
.
.
.
..
... 4-11
4-9
Correction of Pressure Plate
4-15
Assembly
of
Clutch-Series
Rattle-1948,
Series 70
.......
4-8
1948,70
.
..
. .
.
.
.
..
.....
.. .. . 4-12
4-10
Removal of Clutch-All Series 4-9
4-16
Installation of Clutch - All
4-11
Disassembly of
Clutch-Series
Series
..
. .
. .
.
.. . ...
..
.
.
.
. . . . 4-13
SERVICE
BULLETIN REFEREN CE
Bulletin
No.
Pag
,fNo.
SUBJECT
4-4
CLUTCH
DESCRIPTIO N A
N D
OPERATION
Single plate, dry disc clutches of two dif-
ferent designs are used in cars
equipped
with
Syncro-Mesh transmissions. The Series 40-50
clutch is distinguished by a "crown" type clutch
spring which also serves the same purpose as
conventional clutch release levers and drive
lugs. The 1948 Series 70 clutch is of conveji-
CLUTCH RELEASE
BEARING &
SLEEVE
RELEASE YOKE
'>if k
l
I
.
,
,
SEAL
' J jr--;-.;-...:..I_
MAIN DRIVE
r
lU
GEAR
CLUTCH RELEASE
BEARING SUPPORT
SPRING WASHER
GASKET
CLUTCH SPRING
SPRING RETAINER
Figure
4-1-Clutch
and Flywh
eel
Asse mbly-Series
4
0- 5 0
tional design with coil type clutch springs and
adjustable release
levers.
See figures 4-1 and
4-2.
a. Series 40-50 Clutch
The clutch cover is bolted to the flywheel and
drives the pressure plate through the clutch
spring.
.The "crown" type clutch spring is a spring
steel disc formed in waves to provide spring
action and is cone-shaped when in the free posi-
tion. Notches in the inner edge of the clutch
cover fit over the waves a short distance from
the outer edge of clutch spring to transmit
drive to the clutch spring. Twelve lugs cast on
the pressure plate engage waves at the outer
edge of clutch spring to take the pressure as
well as
drive.
from the spring. The pressure
plate and clutch spring are attached to the
clutch cover by six spring retainers which hook
over ears on inner edge of cover, pass around
outer edge of clutch spring and through holes
in lugs on pressure
plate.
See figures 4-14, 4-15,
and 4-16.
When the clutch
IS III
the engaged position,
the clutch cover compresses the clutch spring,
causing it to exert heavy pressure against the
pressure plate. The pressure plate clamps the
driven plate against
the
flywheel with sufficient
force to transmit the power of the engine with-
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