Shaft Seal Assembly - Chevrolet 1973 Overhaul Manual

22. Valve and head locator (dowel) pins.
23. Service discharge crossover tube kit.
(a)To be used each time a compressor is rebuilt.
All parts required for servicing are protected by a
preservation process and packaged in a manner which
will eliminate the necessity of cleaning, washing or
flushing of the parts. The parts can be used in the
mechanism assembly just as they are removed from the
service package.
Piston ball seats and shaft thrust races will be identified
on the parts themselves to denote their size and
dimension.

Shaft Seal Assembly

When replacing the shaft seal assembly, even if the
compressor remains on the vehicle during the operation,
it will be necessary to purge the system of refrigerant as
outlined in the Chassis Service Manual.
Removal
1. After first purging the system of refrigerant,
remove the clutch hub and drive plate, and the
shaft key.
2. Pry out the sleeve retainer and remove the
absorbent sleeve. Remove the seal seat retaining
ring using Snap Ring Pliers J-5403.
3. Thoroughly clean the area of the compressor neck
surrounding the shaft, the exposed portion of the
seal seat, and the shaft itself of any dirt or foreign
material before removing the seal seat.
AIR C O N D IT IO N IN G COM PRESSOR
Fig. 9— In sta llin g Coil Housing
4. Place Tool J-22974 over the end of the shaft to
prevent chipping the ceramic seat. Fully engage the
knurled tangs of Tool J-23128 into the recessed
portion of the seal seat by turning the handle
clockwise. Lift the seat from the compressor with a
rotary motion (fig. 11).
DO NO T tighten the handle with a
CAUTION:
wrench or pliers; however, the handle must be
hand tightened securely to remove the seat.
5. With Tool J-22974 still over the end of the shaft,
engage the tabs on the seal assembly with the tangs
on Tool J-9392 by twisting the tool clockwise while
pressing the tool down. Then lift the seal assembly
out.
6. Remove the seal seat "O " ring from the compressor
neck using Tool J-9553 (fig. 11).
7. Recheck the shaft and inside of the compressor
neck for dirt or foreign material and be sure these
areas are perfectly clean before installing new
parts.
Inspection
Seals should not be reused. Always use a new seal kit on
rebuild. Be extremely careful that the face of the seal to
be installed is not scratched or damaged in any way.
Make sure that the seal seat and seal are free of lint and
dirt that could damage the seal surface.
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