Pontiac tempest 1968 Service Manual page 47

1A-20 1968 P O N T I A C SERVICE M A N U A L
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.
12. Examine swash plate surfaces for excessive
scoring or damage. If satisfactory, reuse. If neces­
sary, 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 con­
tain a front and rear half doweled together. This
assembly will also 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 half
15. Check main shaft bearings for roughness and
replace as necessary. Use J 9432 to replace
bearings.
GAUGING FOR NEW PARTS
Obtain the parts discussed in the introduction of
this section.
F i g . 1 A - 2 6 Removing Rear Thrust Races and Bearings
NOTE: If thrust bearings and races are to be re­
placed, use parts as outlined below; otherwise use
existing bearings and races.
1. Secure four ZERO thrust races, three ZERO
shoe discs and two new thrust bearings.
2. Stack a ZERO thrust race, a new needle thrust
bearing and a second ZERO thrust race. Assemble
this "sandwich" of parts to FRONT end of com­
pressor main shaft.
3. Place FRONT half of cylinder on J 9397 com­
pressing fixture. Insert threaded end of shaft (with
front bearing assembly) through front main bearing
and allow thrust race assembly to rest on hub of
cylinder.
4. Stack a ZERO thrust race, a new thrust bear­
ing and a second ZERO thrust washer. Assemble
this "sandwich" of parts to REAR of compressor
main shaft so it rests on hub of swash plate (Fig.
1A-28).
5. Apply a light coat of clean refrigerant oil to
ball pockets of each of three pistons.
6. Place balls in piston pockets.
7. Apply a light coat of clean refrigerant oil to
cavity of three new ZERO shoe discs.
8. Place a ZERO shoe over each ball in FRONT
end of piston. Front end of piston has an identifying
notch in casting web (Fig. 1A-30).
9. Place a ball only in rear ball pocket of each of
three pistons (Fig. 1A-29).
NOTE: Do not assemble any piston rings at this
time.
10. Rotate shaft and swash plate until high point
of swash plate is over piston cylinder bore, which
had been identified as No. 1. Insert front end of No. 1
piston (notched end) in cylinder bore (toward the
front of compressor) and at same time, place front
ball and shoe and rear ball only over swash plate
(Fig. 1A-31).
NOTE: It may be necessary to lift shaft assembly
to aid in installing pistons. Hold front thrust bear­
ing pack tightly against swash plate hub while lift­
ing shaft (Fig. 1A-30).
11. Repeat this operation for No. 2 and No. 3
pistons. Balls and shoes must adhere to piston dur­
ing this assembly.
12. Align rear cylinder casting with bores, suction
passage, discharge crossover holes, dowel pins, etc.
Tap into place using a hard wood or plastic block
and mallet (Fig. 1A-31).