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Clutch Facings Removal and Replacement
The facings must be removed from the clutch disc by drilling from the head or smooth side of the rivet. Drilling from the other side will spin the rivet. Caution —Never remove these rivets on a brake relining machine, as it will spring or distort the clutch disc.
In riveting new facings to the clutch disc, the riveting fixture
shown in Fig. 98 will support the
Fig. 98— Clutch Disc Riveting Fixture
disc and set the rivets properly. This riveting fixture has an
adjustable locating pin to properly center the rivet under the
set and an adjustable handle which, when set properly, will squash
the rivet the proper amount —n".
In assembling rivets, they must be reversed, two each way. Only
Genuine Chevrolet Rivets, designed and made especially for this
part, should be used. I f other than this rivet is used, worn fly-wheel
and pressure plates will be the result.
Fig. 99— Clutch Pilot Assembling Tool
To Install Clutch
Assemble the clutch disc to the flywheel and place the clutch cover
and pressure plate assembly into position with the nine screw holes
in the clutch cover, lining up with the screw holes in the flywheel.
To Reassemble Clutch Cover and Pressure Plate
Place the levers in position in the cover and assemble the lever
pins. You will note that the casting supporting the levers has
a hollow part cast in them opposite the lever pins. This allows
the lever pin to be pushed to the opposite side of these holes
and that end of the spring should be assembled to the pin. Push
the lever pin to the opposite side and slide the spring through
the hollow part of the casting and assemble it to its end to the
groove in the pin. Fig. 97.
Assemble the nine springs into position in the pressure plate and
place the cups on them. Place the cover and lever assembly in position
and
Fig. 97— Method of Assembling Lever, Pin and Spring
compress in arbor press, start the cover to pressure plate screws.
Tighten these screws one turn at a time until the cover has been
securely bolted in place.
On standard model the colored spring should be assembled in the
center of each bank of three springs. All center springs should
be the same color.
Clutch Disc
Two types of clutch discs are used in production and service. The
first or the 9" disc has facings made of molded woven composition
and is used on passenger cars, %-ton trucks and Standard models.
The second or 10" disc has facings made of molded asbestos
and is used on 1 -ton trucks.
The 9" clutch disc will assure long life and easy shifting
when used on the Passenger cars and 1/2-ton trucks. The 10" disc
gives longer life on the 1 1/2 ton truck, but loss of easy shifting
is due to the extra large disc.
There are no practical reasons why the 9" disc cannot be used
on the 1-ton truck, nor is there any reason why the 10" disc
cannot on the passenger, but you sacrifice easy shifting on the
passenger cars when the 10" disc is used on these models and
long life when the 9" disc is used on the 1 1/2 ton truck.
