Chevrolet Chevelle 1977 Repair Manual page 36

1B-30
Fig. 8 7 - R e p la c in g T h r u s t and Bellevil le W a s h e rs
correctly to cylinder. Tighten front head mounting screws
to 18-22 foot pounds.
4. Install a new compressor shaft seal.
5. Install clutch rotor and bearing assembly, clutch coil
and pulley rim assembly to front head (Fig. 83). Before fully
seating the assembly on front head be sure clutch coil
terminals are in the proper location in relation to
compressor and that the three protrusions on rear of clutch
coil align with the locator holes in front head.
6. Install rotor and bearing assembly retaining ring and
reassemble clutch plate and hub assembly.
7. Leak test compressor as described under "Leak
Testing the Compressor" and correct any leaks found.
THRUST AND BELLEVILLE WASHER
REPLACEMENT
1. Remove two thrust and one belleville washer from
compressor shaft. Note the assembled position of the
washers.
2. Install a new thrust washer on compressor shaft with
thrust washer tang pointing up (Fig. 88).
3. Install the new belleville washer on shaft with the
high center of the washer up (Fig. 87).
4. Install the remaining thrust washer on shaft with the
tang pointing down (Fig. 87).
5. Lubricate the three washers with clean oil (525
Viscosity) and assemble front head to cylinder.
M A IN BEARING REPLACEMENT
Removal
1. Remove front head assembly.
2. Place front head assembly on two blocks (Fig. 88)
and using main bearing remover J-24896 drive bearing out
of front head.
Installation
1. Place front head with neck end down on a flat, solid
surface.
2. Align new bearing and bearing installer J-24895
squarely with bearing bore of front head and drive bearing
OVERHAUL MANUAL
into front head (Fig. 89). The tool J-24895 must seat against
front head to insert bearing to proper clearance depth.
3. Assemble front head to cylinder and complete the
assembly.
COMPRESSOR SHELL, CYLINDER
RING AND VALVE PLATE REPLACEMENT
The clutch plate and hub assembly, the clutch rotor
and bearing assembly, the clutch coil and pulley rim must
be removed before compressor shell can be removed or
replaced. The location of clutch coil terminals should be
marked for reference on reassembly. Allow compressor to
cool to room tem perature before attem pting to remove
compressor shell as greater force will be required to remove
the compressor shell when hot due to metal expansion
difference between the alum inum cylinder and steel
compressor shell.
Fig. 8 8 - R e m o v in g M a in Bearin g
Fig. 8 9 — 1 nsta lling Main Bearing
0"
J-24895
MAIN
BEARING