Pontiac tempest 1968 Service Manual page 37

1A-10 1967 PONTIAC S E R V I C E M A N U A L
suction gauge fitting, and also at the discharge
gauge fitting.
2. Remove the flare nut from center connection on
gauge manifold or the plug in the gauge line attached
to the center connection. Wrap the line at the outlet
with a cloth to protect persons and car surfaces
from oil or refrigerant.
3. Slowly depressurize refrigeration system.
4. While system is depressurizing remove clutch
assembly and coil from old compressor as outlined
under COMPRESSOR CLUTCH, COIL AND S E A L
R E P L A C E M E N T . If parts are not oil soaked and are
in good condition, lay them aside on a clean surface
as they may be installed on the new compressor.
5. After the system is completely depressurized,
very slowly loosen screw which retains compressor
fittings assembly to compressor. As screw is being
loosened, work fittings assembly back and forth to
break seal and carefully bleed off any remaining
pressure.
CA UTION: High pressure may still exist at the
discharge fitting. If this pressure is released too
rapidly there will be a considerable discharge of
refrigerant and oil.
6. When all pressure has been relieved, remove
screw and remove fittings assembly and O-ring
seals.
7
0
Immediately cover compressor openings. A
simple way is with a plate (similar to the one on new
compressor) which can be attached with fittings as­
sembly screw, using the O-rings to provide a seal.
8. Disconnect compressor clutch coil wire and
remove compressor mounting plates to bracket bolts,
front and rear.
9. If there is any possibility that broken parts
from the compressor got into the discharge line or
the condenser, all refrigeration system parts should
be cleaned and a new receiver-dehydrator assembly
should be installed.
10. Drain all oil from compressor just removed
in a clean dry container and replace compressor
drain plug screw. Measure amount of oil drained.
See CHECKING COMPRESSOR OIL L E V E L AND
ADDING OIL.
COMPRESSOR REPLACEMENT
NOTE: Before installing a new compressor, ro­
tate compressor shaft four or five times. This
permits proper lubrication of compressor seal
over all its surface. Before compressor clutch is
mounted to the new compressor, wipe the front
face of the compressor thoroughly with a clean dry
cloth and, if necessary, clean front of compressor
with a solvent to remove any excess oil. Cleaning
compressor in this manner will prevent any oil
from being thrown onto the clutch surfaces which
would cause slippage and eventual clutch failure.
1. Stamp refrigerant charge of refrigerant system
on new compressor in space on plate provided for
this information.
NOTE: Follow procedure for replacing oil in new
compressor explained under REMOVING AND
INSTALLING COMPRESSOR.
2. Install new compressor on car, leaving com­
pressor f i t t i n g s opening c o v e r p l a t e on
compressor.
3. Remove cover plate over compressor openings
very slowly to bleed off pressure.
CA UTION: New compressors are charged with a
mixture of nitrogen, Refrigerant-12 and 11 fluid
ozs. of Frigidaire 525 viscosity oil. If the cover is
removed too rapidly, the oil will be blown out
violently with the sudden release of pressure.
4. Install coil and clutch parts if not already
installed.
5. Evacuate, charge and perform OPERATIONAL
T E S T .
•COMPRESSOR H U i AND DRIVE
PLATE ASSEMBLY
REMOVE AND REPLACE
REMOVE
1. Hold the clutch hub with J 9403 wrench and
using J 9399 (special thin wall 9/16" socket), remove
hub and drive plate assembly lock nut from shaft
(Fig. 1A-4).
2. Screw threaded hub puller J 9401 into the hub.
Holding body of tool with a wrench, tighten the cen­
ter screw to remove hub and drive plate assembly
(Fig. 1A-5). Remove J 9401 puller.
3. Remove hub and drive plate assembly retainer
ring, using J 5403 (No. 21 Truarc pliers). Remove
spacer (Fig. 1A-6).
4. Remove hub and drive plate assembly key from
shaft.
R E P L A C E
1. Insert square drive key into hub of drive plate
so it projects approximately 3/16" out of end of
keyway (Fig. 1A-7). Wedge into keyway with blunt
tool.