Pontiac FIREBIRD 1972 Service Manual page 136

CUSTOM AIR CONDITIONING 1A-77
FRONT HALF
CYLINDER
REAR HALF
CYLINDFR
-
PISTON
PISTCN
LOCATION
Fig. 1A-79 Pistons and Cylinders
11. Remove suction crossover cover by sliding out of
slots.
DISASSEMBLE:
Obtain clean J 9402 assembly parts tray to retain compres-
sor parts during disassembly.
1. Number pistons (1, 2 and 3) and their bores so that
parts can be replaced in their original locations (Fig.
1A-79).
2. Turn compressor shaft to position swash plate to-
ward front of compressor in area of discharge cross-
over tube. Drive discharge crossover tube out of rear
Fig. 1A-8 1 Compressor Parts in Tray
head assembly toward front of compressor using a
wooden block as shown in Fig. 1A-80. Use care so
that discharge crossover tube is not damaged by
swash plate.
Separate front and rear cylinder assemblies being
careful not to damage any parts during separation.
Remove rear cylinder half from pistons.
Drive discharge crossover pipe from front head.
Push on compressor shaft and carefully remove pis-
tons, piston rings, shoes and balls; one assembly at a
time. Place parts in J 9402 tray to keep parts together
(Fig. 1A-81). The front end of piston has an identify-
ing notch in the casting web (Fig. 1A-82).
Remove all piston shoe discs, examine for indication
of failure or probable cause of failure, then discard all
shoe discs.
Examine piston balls and, if satisfactory for reuse, put
aside in assembly tray in compartment associated
with proper end of piston.
Fig. 1A-80 Separating Cylinder Halves Fig. 1A-82 Piston Front End Identification