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Sec. 5
Page 84
GM COACH MAINTENANCE MANUAL
CLUTCH
4 Release Levers
1
Special Bolts
2 Clutch Cover
3 Yoke Adjusting Nuts
5 Release Lever Yoke
6 Driving Block Nut
TP
2910
Figure 7-Yoke Adjusting Nut Removal
4. Check clearance between driving blocks and
slotted lugs in pressure plate.
If there is in-
dication of wear or scoring on driving blocks,
replace same.
5. Clean and inspect rollers used at release
lever pins.
Replace
if
rollers show wear.
REPAIR
CLUTCH DRIVEN DISC AND FACINGS
In normal service, clutch facings wear evenly
and last for a long time.
To replace facing, drill out facing rivets from
r
DISC
Figure
8-Clutch Disc Facing Rivet Pattern
1 Pressure Plate
6
2 Lever to Pressure
7 Lever Spring
Plate Pin
8 Release Lever
3
Flat Washer
9
Release Lever
4
Yoke
Button
5 Bearing Rollers
TP 2909
Figure 9-Assembling Clutch Release Lever To Pressure Plate
head of smooth side of rivet.
Use drill slightly
smaller than rivet diameter.
Rivet will turn if
drilled from other side.
Support assembly during facing removal and
installation to prevent distortion of disc.
DO NOT USE BRAKE RE LINING MACHINE
TO REMOVE RIVETS AS CLUTCH DISC WILL
BE SPRUNG OR DIBTORTED.
Facings are interchangeable.
When installing
new facings, use genuine rivets and facings listed
in GMC Parts Book.
Alternate rivets so that heads are in opposite
directions as shown in figure 8.
Check over - all thickness of assembly after
facings are installed,
Test assembly for run-out.
Disc should run true within limits given in "Spec-
ifications" at end of this section.
1 Release Lever Yoke
2 Release Lever
3 Drive Block Slots
4 Lever Spring
5 Pressure Plate
6 Insulating Washer
Figure 10-Pressure Plate and Release Levers
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