Pontiac tempest 1968 Service Manual page 44

CUSTOM A I R C O N D I T I O N I N G 1A-17
placed Is of great importance. Any attempt to use
COMPRESSOR REAR HEAD ASSEMBLY
makeshift or inadequate equipment may result In
damage and/or improper operation of compressor. REMOVE
PRESERVATION AND PACKING
SERVICE PARTS
A l l parts required for servicing w i l l be protected
by a preservation process and packaged i n a manner
which w i l l eliminate the necessity of cleaning, wash­
ing or flushing of the parts. The parts can be used
in the mechanism assembly just as they are r e ­
moved from the service package.
In addition, some parts w i l l be Identified on the
piece part to denote its size or dimension. This
w i l l apply 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 w i l l contain these neces­
sary parts. The gasket k i t should be used whenever
i t is necessary to overhaul or rebuild entire com­
pressor internal mechanism, or when replacing some
individual internal part.
OVERHAUL COMPRESSOR
Anytime a major overhaul or rebuilding opera­
tion is to be performed on this compressor, obtain
and install compressor gasket k i t . This k i t includes
a l l of the necessary O-rings and gaskets. Obtain
also, an ample supply of piston rings.
1. Remove compressor o i l plug, t i l t compressor
and drain o i l Into clean dry container. I t may be
possible to get only 4 to 6 ozs. of o i l from the
compressor at this time.
2. Attach J 9396 holding fixture to compressor and
mount i n 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 teflon surface on the rear head casting
webs. I f any damage Is observed, the head shoule be
replaced (Fig, 1A-18).
6. Remove suction screen and examine for damage
or contamination. Clean or replace as necessary.
7. Remove o i l pump gears noting how they are
mated (end-to-end) and inspect for damage. Replace
both gears i f one or both show damage. Keep gears
mated as they were when removed.
8. Remove rear head to compressor shell O-ring
seal and inspect for damage, cuts, nicks or imper­
fections. A damaged seal may be the cause of a
refrigerant leak. In any event, this O-ring seal must
be replaced with a new one.
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
assembly attached to refrigerant lines. Keep com­
pressor horizontal at a l l times. Placing the com­
pressor on either end w i l l allow o i l from the
compressor sump to enter the head.
T E F L O N
^ G A S K E T
S U R F A C E
5. Seal compressor fittings opening and openings
in compressor rear head.
6. Thoroughly clean exterior of compressor as­
sembly and blow dry with compressed dry a i r .
7. Clean compressor assembly on clean, dry work
bench.
NOTE: Under NO circumstances should compres­
sor be placed on the pulley end.
Fig. 1 A - 1 8 Sealing Surface on Head Casting Web