Compressor Assembly-Internal Cylinder And S H A Ft - GMC 1990 Light Truck Repair Manual

1B4-12 HR-6 AIR CONDITIONING COMPRESSOR
14. Cylinder seal (15).
15. Suction reed plate (14).
16. Valve plate (13).
17. Head gasket (12).
18. Front head (11).
Clean
• All parts.
Inspect
L *
All parts and replace as necessary.
COMPRESSOR A SSEM B LY-
INTERNAL CYLINDER AND
SHAFT
+ + Install or Connect (Figures 4, 31 through 39)
Tools Required:
J 21352-A Support Block
J 33016 Cylinder Alignment Rods
J 33026 Compressor Holding Fixture
Use new seals and gaskets.
Place J 21352-A on the workbench or suitable flat
work surface.
Rear head (28) onto J 21352-A.
• Install J 33016 guide pins small diameter ends
into the through bolt holes (figure 31).
Head gasket (27).
• Over guide pins into head (28) (figure 32).
Important
• Locate the head gasket (27) to prevent the dis­
charge valve reed retainer on the rear valve
plate (26) from hitting the internal segment of
the head gasket (27) (figure 32).
3. Valve plate (26).
• Over the guide pins into position (figure 33).
A. O-Ring Seal Seat Recess
B. Thum b Screw
24, C ylinder Seal (Lubricated)
23. Rear C ylinder
11. Front Head
Figure 30 — Installing the O-Ring Seals on the
Cylinder Seal Races
Opening to Rear Suction Port
(12 O 'C lock Position A ssem bly Reference)
B. Through Bolt Hole (6)
C. Suction Pressure (O utside Cavity)
D.
Discharge Pressure (Inner Cavity)
E.
Opening to Rear Discharge Port
F. High Pressure Relief Valve
G. Drilled Opening into High
Pressure Relief Valve Area
Rear Head
28.
B-06476
Figure 32 — Installing the Rear Head Gasket
J-33016
21352-A
B-06727