Chevrolet 30 Series 1967 Service Manual page 395

check retracting springs per step 2. If trouble
still exists, loosen clutch-to-flywheel mounting
bolt at position of lowest reading (leave other
bolts tight), pry cover, away from flywheel, and
insert feeler gauge (fig. 17) to determine thick­
ness of shim required to bring reading within
. ".
010
NOTE:
Use main bearing
3703650, between the clutch cover and flywheel
at attaching bolt locations, trim if necessary.
Total lift readings should be as follows:
L - 4 and L 230
- 6
HD 11"
Make sure proper pedal lash adjustment is made be­
CLUTCH ASSEMBLY
Removal From Vehicle
1. Remove transmission as outlined in "Transmission
Section."
2. Disconnect slave cylinder from clutch fork.
3. Remove clutch throwout bearing from the fork.
4. Remove clutch fork by pressing it away from its ball
mounting with a screwdriver, until the fork snaps
loose from the ball or remove ball stud from rear of
clutch housing.
NOTE:
The retainer may be removed from the
fork by prying out with a small screwdriver.
5. Install Tool J-5824 to support the clutch assembly
during removal.
. Loosen the clutch attaching bolts one turn at a time
6
to prevent distortion of clutch cover until dia­
phragm spring is released.
7. Remove clutch pilot tool and remove clutch assembly
from vehicle.
Installation to Vehicle
1. Install the pressure plate in the cover assembly lin­
ing up the notch mark on pressure plate with notch
mark on flange of cover.
2. Install pressure plate retracting springs and drive
strap to pressure plate bolts and lockwashers and
tighten to 11 ft. lbs. torque. The clutch is now ready
to be installed.
3. Hand crank the engine until "X " mark on flywheel is
at the bottom.
4. Install clutch disc, pressure plate and cover assem­
bly and support them with Tool J-5824.
5. Turn clutch assembly until "X " mark on clutch cover
flange lines up with "X " mark on flywheel.
. Install attaching bolts and tighten each one a turn at a
6
time to prevent distorting the cover as the spring
pressure is taken up.
7. Remove clutch pilot Tool J-5824.
. Pack clutch fork ball seat with a small amount of
8
high melting point grease and install a new retainer
in the groove of the clutch fork if the old retainer is
worn or damaged.
NOTE: Install retainer with high side up, away
from bottom of the ball socket and with open end
of retainer on the horizontal.
shim Part No.
.065 to .075
.065 to .085
SERVICE OPERATIONS
CLUTCHES AND TRANSMISSIONS 7-9
fore checking.
NOTE: Excessively high readings indicate that
the diaphragm spring is being over stressed
which may eventually cause loss of load and
result in slippage.
If above measures fail to correct the trouble, check
driven disc with clutch pedal depressed (it should spin
freely with transmission in neutral). If it does not,
trouble may be:
1. Misalignment between pilot bushing in crankshaft and
clutch housing—see clutch housing alignment Sec­
tion .
8
2. Faulty clutch pilot bushing.
3. Faulty driven disc.
4. Improper slave cylinder adjustment.
Be careful not to use too much lu-
CAUTION:
bricant.
Replace clutch fork ball if removed in the clutch
housing and snap clutch fork onto the ball.
.
Lubricate the recess on the inside of the throwout
10
bearing collar and coat the throwout fork groove with
a small amount of graphite grease (fig. 18).
. Install throwout bearing assembly to the throwout
11
fork.
12
.
Assemble transmission as outlined in Transmission
Section, and install flywheel underpan.
Align push rod to clutch fork and attach return spring
13.
to clutch fork.
Adjust clutch linkage (See Adjustments in this sec­
14.
tion).
PACK THIS RECESS
Fig . 18 - Lubrication Points on Clutch Throwout Bearing C o lla r
CHEVRO LET TRUCK SERVICE M ANUAL