GMC 1990 Light Truck Repair Manual page 55

J-33011
30. Shaft Seal Seat O-Ring
Figure 24—Installing the Shaft Seal Seat O-Ring
A. Plastic Headed Hammer
B. Wood Block
33. Front Head
43. Rear Head
Figure 25—Tapping the Front or Rear Head Free
of the Cylinder
7. Rear head (43), head gasket (42), rear valve plate
(41), suction reed plate (40) and cylinder-to-rear head
seal (39).
• Using a wood block, tap around the edge of the
rear head to remove (figure 25).
Install or Connect (Figures 3, 26 and 27)
0
Tools Required:
J 9625-A Pressure Test Set with Schrader Valve
J 34993 Cylinder Alignment Rods
J 21352-A Support Block
Use new seals and gaskets.
Place the rear head on J 35372 with the control valve
(5) at the 6 o'clock position.
Cylinder Alignment Rods J 34993 in the mounting
holes at the 5 and 11 o-clock positions (figure 26).
V5 AIR CONDITIONING COMPRESSOR 1B2-11
J-34992
F-04573
C. Suction Pressure (Oiftsic^e Cavity)
D. Discharge Pressure (Inner Cavity)
G. Drilled Opening into High
43. Rear Head
F-04572
A. Opening to Rear Suction Port
(12 O 'Clock Position Assembly Reference)
B. Through Bolt Hole (6)
E. Opening to Rear Discharge Port
F. High Pressure Relief Valve
Pressure Relief Valve Area
Figure 26—Positioning the J 34993 Guide Pins
Figure 27—Installing the Rear Head Gasket
J 34993
35372
F-06460