Chevrolet 1977 10 Series, Repair Manual, Page: 23 / 468

AIR CONDITIONING 1B-17
Fig. 4 8 -- T u r n in g Piston and Ring Asm. in to Ring Sizing T oo l
A-6 COMPRESSOR INTERNAL M EC H A N ISM
Assembly
A fter properly performing the "Gaging Procedure",
choosing the correct shoe discs and thrust races, and
installing any needed Teflon Piston Rings, the cylinder
assembly may now be reassembled. Be sure to install all
N EW seals and O-rings. All are included in the compressor
O-Ring Service Kit.
Assembly procedure is as follows:
1. Support the F R O N T half of the cylinder assembly
on Compressing Fixture J-9397. Install the shaft and axial
plate, threaded end
down
, with its front bearing race pack
(ZER O race, bearing N U M B E R E D race), if this was not
already done at the end of the "G aging Procedure".
2. Apply a light sm ear of petroleum jelly to the
"num bered" shoe discs chosen in the gaging procedure and
install all balls and shoe discs in their proper place in the
piston assembly.
3. R otate the axial plate so that the high point is above
cylinder bore No. 1. Carefully assemble Piston No. 1,
com plete with ball and Z ER O shoe disc on the
front
A N D
ball and N U M B E R E D shoe disc on the
re a r
, over the axial
plate. H old front thrust bearing pack tightly against axial
plate hub while lifting hub. Insert the Piston Assembly into
Fig. 49~G aging Piston Ring Size
Fig. 5 0 - l n s t a l l i n g 1st A-6 Piston A s s e m b ly Into F ront
C y lin d e r Ha lf
the front cylinder half (Fig. 50).
4. Repeat this operation for Pistons No. 2 and No. 3
(Fig. 51).
5. W ithout installing any O-rings or bushings, assemble
one end of the new Service discharge cross-over tube into
the hole in the front cylinder half (Fig. 52 and 53).
Be sure the flattened portion of this tube faces the
inside
of the com pressor to allow for axial plate clearance
(Fig. 53).
6. Now rotate the shaft to position the pistons in a
stair-step arrangem ent; then
carefully
place the rear
cylinder half over the shaft and start the pistons into the
cylinder bores (Fig. 54).
7. W hen all three Piston and Ring assemblies are in
their respective cylinders, align the end of the discharge
" Z E R O " F R O N T
SHOE DISC
" Z E R O " T H R U S T
RACES. LI FT
SHAFT UPWARD
AND HOLD THE
THRUST RACES
AND BEARING
AGAINST HUB
THRUST BEARING
"SELECTED"
REAR THRUST RACE
I
THRUST BEARING
"SELECTED" REAR SHOE DISC
Fig. 5 1 -ln s ta llin g 2nd A-6 Piston
FRONT THRUST RACES AND BEARINGS
________ f i i ________________________
REAR THRUST RACES
AND BEARING
BALL AND
FRONT AND R