GMC 1989 Light Duty Truck Repair Manual page 89

A. S u c tio n C ro sso ve r O p e n in g s
B. T h ro u g h B o lt H ole (6)
C. S u c tio n Port (3) in Valve Plate
D. D isch a rg e C ro sso ve r Port
E. D ischa rg e P orts (In Valve Plate)
Figure 33 — Installing the Rear Valve Plate
4. Suction reed plate (25).
• Over the guide pins into proper position (figure
34).
• Be sure all three suction reed tips cover the
suction ports in the rear valve plate (26).
5. Cylinder seal (24).
• Lubricate a new cylinder seal (24) with clean
525 viscosity refrigerant oil and position the
seal on the rear cylinder (23) (figure 30). Roll the
cylinder seal into the groove. Cylinder (23) sur­
face must be clean at the rear.
• Apply refrigerant oil to the seal surface of the
rear head to easy assembly.
6. Cylinder and shaft assem bly (gut pack).
• Shaded parts shown in figure 3 are not service­
able. A replacement kit (gut pack) is available
for replacement.
• Assemble cylinder and shaft assembly over the
guide pins onto the rear head (28) (figure 35).
• Using both hands, press the cylinder and shaft
assembly down into the rear head (28).
Important
• Center cylinder seal (22) is not serviceable.
7. Cylinder seal (15).
• Lubricate a new cylinder to front head seal with
clean 525 viscosity refrigerant oil and install in
the front seal groove (figure 35).
8. Suction reed plate (14).
• Over J 33016 guide pins (figure 36).
• Check the alignment.
9. Valve plate (13).
• Over J 33016 guide pins (figure 37).
10. Head gasket (12).
• Over J 33016 guide pins (figure 38).
11. Front head (11).
• Line up mark on front head (11) with the alignm ent
marks on the compressor cylinders and assemble
head over J 33016 guide pins (figure 27).
HR-6 AIR CONDITIONING COMPRESSOR 1B4-13
B-06731
Figure 35 — Installing th e Front H ead