Compressor Rear Head And Internal Mechanism Pressure Relief Valve - Chevrolet 1973 Overhaul Manual

Fig. 11-R em oving Seal Seat and " 0 " Ring
slightly (to release it from the seal) and remove
Tool J-9392.
3. Coat the seal face of the new seal seat with clean
refrigeration oil. Grip the seal seat with Tool
J-23128 and push into place with a rotary motion,
so as not to disturb the "O " ring and to also effect a
seal with this "O" ring. Remove Tool J-23128.
4. Install the new seal seat retainer ring with Tool
J-5403, with the flat face against the seal seat. Press
on the retainer ring until it snaps into place.
Remove Tool J-22974 from the end of the shaft.
5. Leak test the compressor as described under "Leak
Testing the Compressor" in this section. Correct
any leaks found.
6. Install the new absorbent sleeve by rolling the
material into a cylinder, overlapping the ends, and
slipping the sleeve into the compressor neck with
the overlap toward the top of the compressor. With
a small screw driver or similar instrument, carefully
spread the sleeve until the ends of the sleeve butt at
the top vertical centerline.
7. Position the new metal sleeve retainer so that its
flange face will be against the front end of the
sleeve. Tool J-9395 may be used to install the
retainer. Press and tap with a mallet, setting the
retainer and sleeve into place (retainer recessed
approximately 1/32" from the face of the
compressor neck).
8. Reinstall the clutch hub and drive plate assembly.
Compressor Rear Head and Internal
Mechanism
Service operations to the rear head or internal
mechanism of the compressor should be performed with
the compressor removed from the vehicle to insure that
the necessary degree of cleanliness may be maintained.
Clean hands, clean tools and a clean bench, preferably
covered with clean paper, are of extreme importance.
AIR C O N D IT IO N IN G COM PRESSOR
Fig. 12-C hecking for W obble Plate Position on Shaft
Fig. 13-R eplacing Seal and " 0 " Ring
Pressure Relief Valve
When a faulty pressure relief valve, located in the rear
head casting, is encountered, the valve assembly should
be removed after purging the system and a new valve
and gasket installed. The entire system should then be
evacuated and recharged.
1-7
STRAIGHT EDGE
WIRE G A U G E
.029" SHOULD " G O "
.072" SHOULD "N O T G O "
OR SHOULD "JUST G O "
ABSORBENT SLEEVE
SLEEVE RETAINER
SEAL SEAT
RETAINER R IN G
SEAL SEAT
G " R IN G
SEAL ASSEM BLY
OVERHAUL MANUAL