Compressor Hub And Drive Plate Assembly; Compressor Replacement - Pontiac Grand Prix Service Manual

1A-10 1969
PONTIAC SERVICE MANUAL
4. While system is depressurizing, remove clutch
assembly and coil from old compressor as outlined
under COMPRESSOR CLUTCH, COIL AND SEAL
REPLACEMENT. 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.
CAUTION: High pressure may still exist at the
discharge fitting.
If
this pressure is released too rapidly,
there will be a considerable discharge of rejigerant and
oil.
6. When all pressure has been relieved, remove screw
and remove fittings assembly and O-ring seals.
7. Immediately cover compressor openings. A simple
way is with a plate (similar to the one on new
compressor) which can be attached with fittings
assembly 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 con-
denser, 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 CHECK-
ING COMPRESSOR OIL LEVEL AND ADDING
OIL.
COMPRESSOR REPLACEMENT
NOTE: Befoe installing a new compressor, rotate
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 jont face of the compressor thoroughly with a
clean dry cloth and, i f necessary, clean jont 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 compressor
fittings opening cover plate on compressor.
3. Remove cover plate over compressor openings very
slowly to bleed off pressure.
CA
UTZON: New compressors are charged with a
mixture of nitrogen, Refiigeran t-12 and
1 1
fluid
02s. of Frigidaire 525 viscosity oil, or equivalent.
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
TEST.
COMPRESSOR HUB 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)premove hub and
drive plate assembly lock nut from shaft (Fig. 1A-4).
2. Remove hub and drive plate assembly retainer ring,
using J 5403 (No. 21 Truarc pliers). Remove spacer
(Fig. 1A-5).
3. Screw threaded hub puller J 9401 into the hub.
Holding body of tool with a wrench, tighten the center
screw to remove hub and drive plate assembly (Fig.
1A-6). Remove J 940 1 puller.
4. Remove hub and drive plate assembly key from
shaft.
REPLACE
1. Insert square drive key into shaft so it projects
approximately 3/ 16" out of end of keyway (Fig. 1A-7).
Wedge into keyway with blunt tool.
2. Line up key in hub with keyway in shaft.
CAUTION: To avoid internal damage to the compres-
sor, DO NOT drive or pound on hub of drive plate
assembly or on .end of shaft. If proper took to remove
and replace clutch parts are not used, it is possible to
disturb the position of swash plate (keyed to main shaj)
and result in compressor damage.
3. Position hub and drive plate assembly into compres-
sor front end casting.
4. Place J 9480-2 "free" spacer on hub and drive plate
assembly and screw J 9480 drive plate, installing tool
on threaded end of compressor shaft approximately