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GROUP 6
CLUTCH
CONTENTS
Page
DESCRIPTION
.........................
1
SERVICE DIAGNOSIS
. . . . . . . . . . . . . . . . . . .
1
SERVICE PROCEDURES
. . . . . . . . . . . . . . . . . .
2
Description
The clutch is of the single dry disc type with no ad-
justment for wear being provided in the clutch itself.
An individual adjustment is provided for locating
each lever in the manufacturing, and should not be
disturbed.
6-Cylinder Veh ides
The standard clutch size for vehicles with 6-cylinder
engines is
9%
inches on Models AV-1 and
9%
inches on Models AR-1, and AP-1. The 10 and 11 inch
special equipment clutch used on AR-1 and AP-1 has
special bolts to attach the clutch to the flywheel. No
lockwashers are used with this assembly.
8-Cylinder Veh ides
The standard clutch size for vehicles with 8-cylinder
SPECIFICATIONS AND
TIGHTENING
. . . . . . . . . . . .
In Rear of
Manual
engines is 9% inches for Models AV-2, 10 inches for
Models AR-2 and 10Y2 inches for Models AP-2.
The special equipment clutch size for vehicles with
8-cylinder engines is 10Y2 inches on Models AR-2 and
The Semi-centrifugal type clutch (Fig. 1) has lighter
pressure springs,
so
that the clutch pedal may be de-
pressed more easily. To compensate for the loss of
torque capacity with the use of lighter springs,
six
cylindrical rollers have been added to the clutch. The
rollers wedge themselves between the pressure plate
and the clutch cover with a force which increases
with engine speed. The wedging action of the rollers
applies additional force to the pressure plate to in-
crease the torque transmitting capacity of the clutch.
AP-2.
Condition
SERVICE DIAGNOSIS
Possible Cause
Correction
CLUTCH CHATTER
(a) Worn or damaged
disc
assembly.
(b) Grease or oil on disc facings.
(c)
Improperly adiusted cover assembly.
CLUTCH SLIPPING
(a) Burned, worn, or oil soaked facings.
(b) Insufficient pedal free play.
(c) Weak or broken pressure springs.
DIFFICULT GEAR
SHIFTING
(a)
Excessive pedal free
play.
(b) Worn or damaged disc assembly.
(c) Improperly adiusted cover assembly.
(d) Clutch disc splines sticking.
(a) Replace disc assembly.
(b) Replace disc facing or disc assembly.
(c) Remove and replace the clutch
(a)
Replace facings or disc assembly.
(b) Adjust release fork rod.
(c) Replace clutch assembly.
(a) Adjust release fork rod.
(b) Replace disc assembly.
(c) Remove and replace clutch
(d)
Remove disc assembly and free up splines
o r
replace the disc.
CLUTCH NOISY
(a) Dry clutch linkage.
(a) Lubricate where necessary.
(b) Worn release bearing.
(c) Worn disc assembly.
(d) Worn release levers.
(e) Worn or
dry
pilot bushing.
(f)
Dry contact-pressure plate lugs in cover.
(b) Replace release bearing.
(c) Replace the facings or disc assembly.
(d) Replace clutch assembly.
(e) Lubricate or replace bushing.
(f) Lubricate very lightly.
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