1917 Cadillac - GM Heritage Center

78 ADJUSTMENTS
ADJUSTMENTS
79
MAIN CLUTCH
The main clutch is of the multiple disc dry plate type.
The eight driving discs "A," Fig. 41, are covered on both sides with a
friction material, composed largely of asbestos, and are driven by gear teeth
in the clutch ring "H" which is bolted to the engine fly-wheel "G."
The nine driven discs "B" are not covered. These discs are carried on the
clutch hub "E" and drive it through six keys on the hub. The clutch hub
is keyed to the transmission shaft "F."
When the clutch is engaged by allowing the clutch pedal to come towards
you, the spring "C" forces all of the discs together. The resulting friction
between the discs "A" and "B" drives the transmission shaft "F" and the
car, when the transmission control lever is in other than the neutral position.
ADJUSTMENT OF CLUTCH PEDAL
After the car has been run for some time it may be found that the facings
on the clutch discs have become compressed or worn to some extent and that
consequently the clutch pedal strikes the stop screw before the clutch is fully
engaged. When this condition exists a readjustment may be made as follows:
Remove the pin "N," Fig. 43, and adjust the yoke "P," which is threaded
on the rod "O," so that when the pin "N" is replaced the clutch pedal has a
movement back and forth of one and one-quarter inches without starting to
release the clutch. Secure the pin "N" with a cotter pin and tighten the lock
nut "V."
ADJUSTMENT OF CLUTCH PEDAL STOP
The clutch pedal stop screw "S" is adjusted when the car is assembled
and requires no further attention. If the adjustment has been changed, it
may be readjusted in the following manner:
Remove the pin "N" from the yoke "P," loosen the lock nut "R" and
adjust the stop screw "S" so that the pedal arm "U" is held one-half inch from
the under side of the toe board at "T" when the pin "Y" is against the stop
screw. Tighten the lock nut "R."
Then adjust the yoke "P" so that when the pin "N" is replaced the clutch
pedal has a movement back and forth of one and one-quarter inches without
starting to release the clutch. Secure the pin "N" with a cotter pin and
tighten the lock nut "V."
TO SHORTEN OR LENGTHEN CLUTCH PEDAL
Fig. 41. Main Engine Clutch, Sectional View.
There are no adjustments on the clutch proper.
The clutch pedal should be adjusted occasionally to compensate for wear
on the facing of the clutch discs. This adjustment is explained below under
"Adjustment of Clutch Pedal."
There is but one point on the clutch for lubrication. This is the clutch
release ball race "D." Instructions for lubricating this part will be found
under "General Lubrication" on page 43 in this book.
The clutch pedal is made in two parts
slidingly adjustable to accommodate different
drivers.
To change the length of the clutch pedal
remove the bolts "K" and "L," Fig. 42, and
slide the forked piece "M" in the desired
direction. Do not pull "M" out so far that
it is possible to put in only one bolt; two
bolts are required properly to. hold the
parts.
There are four possible positions in this
adjustment, Fig. 42 showing the extreme
shortened position.
The brake pedal may be lengthened or
shortened in the same manner.
Fig. 42. Clutch Control.