Separating Cylinder Halves; Compressor Parts In Tray; Identification Of Front End Of Piston - Pontiac Grand Prix Service Manual

CUSTOM AIR CONDITIONING 1A-19
1. Number-pistons (1, 2 and 3) and their bores so parts
can be replaced in their original locations (Fig. 1A-22).
2. Turn compressor shaft to position swash plate
towards front of compressor in area of discharge
crossover tube. Using J 9492, drive discharge crossover
tube out of rear head assembly toward front of
compressor or use a wooden block as shown in Fig.
1A-23. Use care so that discharge crossover tube is not
damaged by swash plate.
3. Separate front and rear cylinder assemblies being
careful not to damage any parts during separation.
4. Remove rear half cylinder from pistons.
5. Drive discharge crossover pipe from front head,
using J 9492.
6. Push on compressor shaft and carefully remove
pistons, piston rings, shoes and balls; one assembly at
a time. Place parts in the J 9402 tray to keep parts
together (Fig. 1A-24). The front end of piston has an
identifying notch in the casting web (Fig. 1A-25).
7. Remove all piston shoe discs, examine for indication
of failure or probable cause of failure, then discard all
shoe discs.
8.
Examine piston balls and, if satisfactory for reuse,
put aside in assembly tray in compartment associated
with proper end of piston.
9. Remove rear combination of thrust races and thrust
bearing. Discard all three pieces (Fig. 1A-26).
10. Push on shaft to remove shaft from front half
cylinder.
11. Remove front combination of thrust races and
thrust bearing. Discard all three pieces.
Fig.
1A-24
Compressor Parts in Tray
12. Examine swash plate surfaces for excessive scoring
or damage. If satisfactory, reuse. If necessary, replace
main shaft and swash plate assembly.
13. Wash all parts to be reused in a tank of clean
alcohol or similar solvent. Blow dry all parts using a
source of clean, dry air.
14. Examine the front and rear cylinder halves and
replace if cylinder bores are deeply scored or damaged.
NOTE: The service cylinder assembly will contain a
Jiont and rear half doweled together. This assembly will
abo include two main bearings; one main bearing
pressed into the proper location in the front half and the
other in its proper location in the rear ha&
15. Check main shaft bearings for roughness and
replace as necessary. Use J 9432 to replace bearings.
GAGING
FOR
NEW PARTS
Obtain the parts discussed in the introduction of this
section.
Fig.
1A-23
Separating Cylinder Halves
Fig. 1A-25 Identification of Front End of Piston