GMC 1976 ZEO 6083 Maintenance Manual page 93

1- 7 6 AIR CONDITIONING SYSTEM
DRIVEN PLATE
DRIVE PLATE
SCORING OF DRIVE AND DRIVEN PLATES IS NORMAL .
DO NOT REPLACE FOR THIS CONDITION.
A ZERO thrust race is approximately 3/32"
thick and may be used to roughly gage this operat-
ion. Use Clutch Hub Holder J-25030 or J-9403 to
hold clutch plate and hub if necessary.
5. Install the hub spacer and, using Snap-Ring
Pliers J-5403 (#21), install the retainer ring (see
installed Retainer Ring in inset of Figure 40), with
convex side of ring facing spacer .
6 . Use Thin-Wall Socket J-9399 and Clutch Hub
Holder J-25030 or J-9403 to install a new shaft lock
nut
with shoulder or circular projection on the locknut fac-
Figure 46-Aligning Drive Plate Key
Figure 45-Clutch Driven Plate and Drive Plate
ing towards retainer ring .
Tighten the nut to 14-26 lb.
ft. torque . Air gap between the frictional faces should
now be .002" to .057" (figure 48) . If not, check for
mispositioned key or shaft.
7. The pulley should now rotate freely .
8 . Operate the refrigeration system under MAX-
imum load conditions and engine speed at 2000
RPM. Rapidly cycle the cluty by turning the air
conditioning on-and-orr at least 15 times at approxi-
mately one second intervals to burnish the mating
parts of the clutch .
Figure 47-Installing Drive Plate