Pontiac tempest 1968 Service Manual page 52

CUSTOM A I R C O N D I T I O N I N G
1A-25
ASSEMBLE WITH NEW
PARTS
Be sure to install all new seals, gaskets and O-
rings. These are all included in the compressor
gasket kit.
1. Assemble a piston ring, scraper groove toward
the center of piston, to each end of three pistons
0
2. Place front half cylinder on J 9397 compressing
fixture with compressor main shaft (threaded end)
projecting downward through the fixture. Rotate
swash plate so high point is above cylinder base No.
1. With open end of ring toward center of com­
pressor, carefully assemble No. 1 piston (complete
with ball and a ZERO shoe on front end and ball
and numbered shoe on REAR end) over swash plate.
Compress and enter piston ring into front half cyl­
inder. Repeat this operation for pistons No. 2 and
No. 3.
3. Assemble one end of service discharge cross­
over tube into hole in front cylinder (Fig. 1A-37).
4. Rotate shaft to position pistons in a "stair
step" arrangement. Place rear half cylinder over
shaft and start pistons into cylinder bores.
5. Invert cylinder on fixture to complete assem­
bly as follows:
a. Compress piston ring on each piston so as
to permit its entrance into cylinder.
b. When all three pistons and rings are in their
respective cylinders, align end of the discharge
crossover tube with hole in rear half cylinder,
making sure flattened portion of this tube faces
inside of compressor (for swash plate clearance.)
c. When satisfied that all parts are in proper
alignment, tap with a fiber block mallet to "seat"
rear cylinder over locating dowel pins.
6. Generously lubricate all moving parts with
clean Frigidaire 525 viscosity oil. Check for free
rotation of mechanism.
7. Check operation and smoothness of piston travel
before proceeding with remainder of assembly. If
any improper operation is observed during this
check, the mechanism may have to be re gauged.
Complete assembly w h e n correct operation is
obtained.
8. Install crossover cover in cylinder.
9. Place internal mechanism in J 9397 compress­
ing fixture if cylinder head dowel pins are to be
replaced.
10. Replace two dowel pins in front cylinder if
previously removed.
NOTE: A rod drilled 1/4" deep to O.D. of dowel
pins will aid in installing pins.
11. Remove internal mechanism from J 9397
fixture.
REPLACE
1. Install service discharge crossover pipe front
O-ring and spacer (Fig. 1A-38).
2. Assemble suction reed valve to front end of
cylinder. Align dowel pin holes, suction ports and
oil return slot.
.BUSHING DISCHARGE CROSS-OVER TUBE BUSHING^
c a r - — 1 — - n n j p
R I N G SERVICE DISCHARGE CROSS-OVER TUBE KIT ° " R I N G
F i g . 1 A - 3 7 Installing Service Discharge Crossover Tube
F i g . 1 A - 3 8 Installing Service Discharge Crossover Parts