GMC 1989 Light Duty Truck Repair Manual page 79

1 . Shaft Nut
2. C lutch Plate and H ub A ssem bly
Puiley B earing R etainer
3.
4. Pulley Bearing
5. Pulley
6
. C lutch Coil A sse m bly
7. Through Bolts (6)
8 . Shaft Seal R etainer Ring
9. S haft Lip Seal
10. O-Ring Seal
11 Front Head
.
12
. Head G asket
13. Valve Plate (D ischarge)
14. Suction Reed Plate
15. C ylinder Seal
Front C ylin de r
16.
Shaft Bearing (2)
18.
19. T hrust Bearing and R aces (2)
20.
Axial Plate S haft A sse m bly
21 . Shaft Key
22. C ylinder Seal
Rear Seal
23.
24. C ylinder Seal
25. Suction Reed Plate
26. Valve Plate (D ischarge)
27. Head G asket
28. Rear Head
29. Switch Seal
30. System C ontrol Sw itch
31. R etainer R ing-S w itch
32. High Pressure R elief Valve
Seal (O-ring)
33.
A. Im portant: S haded parts are not
serviceable and m ust be replaced as a
Important
• Do not drive or pound on the clutch hub or the
shaft (20). Internal dam age to the compressor
may result.
2. Clutch plate and hub assem bly (2) (figure 8).
• Make sure the contact surfaces of the clutch
plate (2) and the pulley (5) are clean.
• Remove the forcing screw tip from J 33013-B
and reverse the body direction on the center
screw.
• Install J 33013-B with bearing (figure 8).
• Back off J 33013-B body enough to allow the
center screw to be threaded against the end of
the compressor shaft.
• Hold the center screw with a wrench and tighten
the hex portion of J 33013-B body while press­
ing the hub onto the shaft. After tightening the
body several turns, rem ove J 33013-B and
check that the shaft key (21) is properly in place
HR-6 AIR CONDITIONING COMPRESSOR 1B4-3
-6
Figure 4 — HR Component View
in the keyway, then install the clutch plate and
hub assembly (2) to its final position.
Measure the air gap between contact surfaces
of the clutch plate and hub assembly (2) and the
pulley (5). The gap should be 0.38-0.64 mm
(0.015-0.025-inch) (figure 8).
Remove J 33013-B.
L*
Inspect
Position of the shaft (20) (even with or slightly
above the clutch hub).
Use J 33027 to hold the clutch plate and hub
assembly (2).
& Tighten
• Shaft nut (1) to 16 N m (12 ft. lbs.) with J 33022.
— Hand spin the pulley (5) to check for free rota­
tion.
• Remove the assembly from J 33026.
F-06508