Removing 1977 R-4 Front Head Mounting Screws; Removing 197 7 R-4 Front Head Asm.; R-4 Compressor Thrust And Belleville Washers; R-4 Compressor Main Bearing - Pontiac TRANS AM 1977 Service Manual

CUSTOM AIR CONDITIONING 18-65
FRONT
Fig. 18-1 22 Removing 1977 R-4 Front Head Mounting
Screws
OIL HOLE TO
FRONT HEAD
Fig. 18-1 2 3 Removing 197 7 R-4 Front Head Asm.
Before fully seating the assembly on the front head, be
sure the clutch~coil terminals are in- the proper location in
relation to the compressor and that the three protrusions on
the rear of the clutch coil- align with the locator holes in the
front head.
6. 1nstall the rotor and bearing assembly retaining ring
and reassemble the clutch plate and hub assembly using its
proper procedure. Check the clutch plate to clutch rotor gap
(.020
-
.040 inches).
R-4 COMPRESOR THRUST A N D
BELLEVILLE WASHERS
Remove and Replace
1. Remove the front head assembly according to its
procedure. Remove and discard the front head O-ring seal.
2. Remove the two thrust and one belleville washer from
the compressor shaft. Note the assembled position of the
washers.
3. Install a new thrust washer on the compressor shaft
with the thrust washer tang pointing "up" (Fig. 1B-124).
Fig. 18-1 24 Replacing 1977 R-4 Thrust and Belleville
Washers
4. Install the new belleville washer on the shaft with the
high center of the washer "up".
5. Install the remaining thrust washer on the shaft with
the tang pointing "down" (Fig. 1B-124).
6. Lubricate the three washers with clean 525 viscosity
refrigerant oil and assemble the front head and new O-ring
seal to the compressor according to its procedure.
R-4 COMPRESSOR M A I N BEARING
Remove
1. Remove the front head assembly according to its
procedure. Discard front head O-ring seal.
2. Place the front head assembly on two blocks as shown
in Fig. 1 B- 125, and use Main Bearing Remover, J 24896, to
drive the bearing out of the front head.
Replace
1. Place the front head "with neck end down" on a flat,
solid surface.
2. Align the new bearing and the Bearing Installer, J
24895, squarely with the bearing bore of the front head and
drive the bearing into the front head. The J 24895 Installer
must seat against the front head to insert the bearing to the
proper clearance depth (see Fig. 1 B-126).