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7C-6
1 9 7 7 PONTIAC SERVICE MANUAL
2. Turn ball stud inward by hand until clutch release
bearing makes contact with clutch spring fingers.
3. Install lock nut and tighten to 25 lb. ft., being careful
not to change ball stud adjustment.
4. Install ball stud cap.
5. Remove gage by pulling outward at housing end.
Clutch Cable Attachment & Adjustment (Lower
End)
1. Place cable thru hole in clutch fork.
2. Pull cable until clutch pedal is firmly against rubber
bumper.
3. Push clhch fork forward until throw out bearing
contacts clutch spring fingers.
4. Screw pin on cable until it bottoms out on fork.
5. Turn 1/4 additional revolution clockwise and drop pin
down into groove in fork.
6. Attach return spring. This procedure will produce
.90"
+
.25" lash at clutch pedal.
r ~ n s t a l l clutch fork cover. Tighten retaining screws to
80 lb. in.
Post-Adjustment Check
The clutch pedal should have free travel (measured at
clutch pedal pad) before the throwout bearing engages the
clutch diaphragm spring levers. Lash is required to prevent
clutch slippage which would occur if the bearing was held
against the fingers or to prevent the bearing from running
continually until failure. A clutch that has been slipping prior
to free play adjustment may still slip right after the new
adjustment due to previous heat damage. Give the clutch time
to cool at least 12 hours to normal temperatures. Any
slippage should then be evaluated as follows:
1. Drive in high gear at 20-25 MPH.
2. Depress clutch pedal to the floor and rev engine to
2500-3500 rpm.
3. Engage clutch quickly (snap foot off pedal) and press
accelerator to full throttle.
Engine speed should drop noticeably, then accelerate
with vehicle. If clutch is bad, the engine speed will increase.
NOTE: Do not repeat more than once or clutch will
overheat.
ON CAR SERVICE
CLUTCH PEDAL REPLACEMENT
A, F or X Series
1. Disconnect clutch pedal return spring.
2. Disconnect clutch pedal push rod at pedal arm.
3. Disconnect and remove neutral start switch.
4. A-Series only: Remove pivot shaft retaining nut from
left side of pedal pivot shaft. Remove pedal arm and bushings
from pivot shaft (Fig. 7C-7).
F-Series only: Remove pivot shaft retaining nut and slide
pivot shaft to the left until it clears the pedal support. Insert
dummy shaft in support to hold brake components in place
while removing pivot shaft. Remove pivot shaft, pedal arm
and bushings from vehicle (Fig. 7C-8).
X-Series only: Remove pivot shaft retaining clip from
right side of pivot shaft. Slide pivot shaft and pedal arm from
support housing and remove from vehicle. Insert dummy
shaft into support housing to hold brake components in place
while sliding pivot shaft out (Fig. 7C-9).
5. Clean and inspect all components. Replace as
necessary. Do not clean nylon bushings with a cleaning agent,
simply wipe with a clean cloth. Relubricate all bushings and
moving parts.
6. Reinstall bushings, pivot shaft and pedal arms in
support housing.
7. Install pivot shaft retainer or lock nut.
8. Position neutral start switch on mounting post and
pedal arm. Install retaining nut and connect switch wiring.
9. Connect clutch push rod to pedal arm.
10. Connect clutch pedal return spring and check clutch
pedal free travel. Adjust clutch neutral start as required.
CLUTCH CROSS SHAFT
A, F or X Series (Figs. 7C-10 and 7C-11)
Removal
1. Remove linkage return and lower linkage springs and
disconnect clutch pedal and fork push rods from respective
cross shaft levers.
2. Loosen outboard ball stud nut and slide stud out of
bracket slot.
3. Move cross shaft outboard, and as required to clear
inboard ball stud, then lift out to remove from vehicle.
Repairs
The cross shaft has nylon ball stud seats which should
be inspected for wear or damage. Also check condition of
engine bracket ball stud assembly and special antirattle
"0"
ring. Figures show component parts of cross shaft. Replace
parts as necessary based on wear or damage. Lubricate ball
studs and seats with graphite grease before reassembly.
Installation
1. Reverse removal procedure to install.
2. Adjust clutch linkage as previously outlined.
CLUTCH CABLE REPLACEMENT
H Series (Fig. 7C-12)
1. Remove clutch fork cover at side of housing.
2. Disconnect return spring and clutch cable at clutch
shift fork.
3. Remove clip and pin retaining cable to pedal arm.
4. Disconnect cable at fender skirt reinforcement.
5. Disconnect bolt holding cable to body reinforcement
pull through body reinforcement.
6. Push new cable through body reinforcement and
secure cable end to pedal arm with pin, washer and clip.
NOTE: Lubricate retaining pin with graphite type
grease.
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