Pontiac FIREBIRD 1972 Service Manual page 134

CUSTOM AIR CONDITIONING 1A-75
7. Compressor shaft, swash plate and key assembly.
8. Service cylinder assembly-front and rear halves with
main bearing in place and halves dowel-pinned
together.
9. Major interior mechanism assembly.
10. Suction reed valve-front, rear.
11. Discharge valve assembly-front, rear.
12. Gasket service kit-containing all gaskets, seals, 0-
rings, etc. This is to be used each time a compressor
is rebuilt after a teardown.
13. Shaft seal kit.
14. Nuts-head to shell and shaft.
16. Cylinder locator pins.
17. Valve and head locator pins.
18. Service type-discharge crossover tube kit.
A clean work bench, orderliness of the work area and a
place for all parts being removed and replaced is of great
importance. Any attempt to use makeshift or inadequate
equipment may result in damage and/or improper operat-
ion of compressor.
CARE AND HANDLING OF SERVICE PARTS
All parts required for servicing the compressor are pro-
tected by a preservation process and packaged in a manner
which will eliminate the necessity of cleaning, washing or
flushing the parts. The parts can be used in the assembly
just as they are removed from the service package.
In addition, some parts are identified on the piece part to
denote its size or dimension. This applies to the piston
shoe discs and the shaft thrust races.
To provide suitable and adequate quantities and grouping
of parts for servicing the compressor, kits are available
which contain these necessary parts. The gasket kit should
be used whenever it is necessary to overhaul or rebuild the
entire compressor internal mechanism or when replacing
some individual internal part.
OVERHAUL PREPARATIONS
Anytime a major overhaul or rebuilding operation is to
performed on the compressor, obtain and install compres-
sor gasket kit. Kit includes all of the necessary O-rings and
gaskets. An ample supply of piston rings should also be
obtained.
1. Remove drive plate and hub assembly.
2. Remove pulley and bearing assembly.
3. Remove clutch coil and coil housing assembly.
4. Remove compressor assembly, leaving fittings assem-
bly attached to refrigerant lines. Keep compressor
horizontal at all times. Placing the compressor on
either end will allow oil from the compressor sump
to enter the head.
5. Seal compressor fittings opening and openings in
compressor rear head.
6. Thoroughly clean exterior of compressor assembly
and blow dry with compressed dry air.
7. Clean compressor assembly on clean, dry work
bench.
CA UTI 0 N:
Under no circumstances shou/d
compressor be p/aced on the pulley end.
REMOVING REAR HEAD ASSEMBLY
1. Remove compressor oil plug, tik compressor and
drain oil into clean dry container. It may be possible
to get only 4 to 6 ozs. of oil from the compressor at
this time.
2. Attach J 9396 holding fixture to compressor and
mount in vise.
3. Remove compressor pressure relief valve.
4. Remove four lock nuts from threaded studs welded
to compressor shell and remove rear head. (NOTE:
Some oil may drain when the head is removed.)
5. Examine surface on rear head casting web. If any
damage is observed, the head should be replaced (Fig.
.ING
ACES
SWITCH
SENSING
TUBE
Fig. 1A-75 Sealing Surface on Head Casting W e b