GMC 1982 Light Duty Truck Service Manual page 140

1D-24 AIR CONDITIONING COMPRESSOR OVERHAUL
Fig. 1D-65 Positioning A-6 Oil Pump Gears
SHELL TO
HEAD O-R NG
CYLINDER
ASSEMBLY
Fig. 1D-66 A-6 Shell-To-Front Head 0-Ring Installation
SLIGHTLY ROTATE
FRONT HEAD IF
NECESSARY TO
LINE UP LOCATOR
PINS AND HOLES
Fig. 1D-67 Installing A-6 Rear Head
CAVITY BETWEEN
GEAR TEETH
(3 O'CLOCK)
OIL SUMP
6 O'CLOCK)
OIL DRAIN
PLUG
204972
FRONT
HEAD
204955
HEAD
If R ear H ead assembly will not slide down over dowels
in Internal Cylinder and Shaft Assembly, twist F ro n t Head
assembly back-and-forth very slightly by-hand until Rear
H ead drops over dowel pins (Fig. ID-67).
25. Install nuts on threaded shell studs and tighten
evenly to 34 N *m (25 lb. ft.) torque using a 0-60 N *m (0-50
lb. ft.) torque wrench.
26. Invert com pressor in Holding F ixture and install
com pressor Shaft Seal as described in " A-6 C om pressor
Shaft Seal" Replacem ent procedure.
27. Install com pressor C lutch Coil and Housing
assembly as described in "A-6 C om pressor C lutch Coil and
Housing A sm ." Replacem ent procedure.
28. Install com pressor Pulley and Bearing assembly as
described in " A-6 Com pressor Pulley and
Replacem ent procedure.
29. Install com pressor C lutch Plate and H ub assembly
as described in "A-6 Com pressor C lutch Plate and H ub
A s m ." R e p la c e m e n t pro cedure.
30. A dd required am ount of 525 viscosity refrigerant
oil (see " C.C.O.T. Refrigerant Oil D istribution" in the A ir
Conditioning section).
31. Check for external and internal leaks as described
in the following "A-6 Com pressor Leak Testing" procedure
found at the end o f this over-haul section.
32. " Evacuate and charge the refrigerant system "
according to the D ischarging, A dding Oil, Evacuating and
Charging Prcoedures for C.C.O.T. A /C Systems in the A ir
Conditioning section.
Bearing"