Chevrolet 1977 Monte Carlo, Руководство по ремонту

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1D-16 AIR C O N D IT IO N IN G COMPRESSOR OVERHAUL
rests on hub o f axial plate. Then add one thrust bearing and
a S E C O N D Z E R O T H R U S T R A C E onto shaft. Lubricate
races and bearing with petrolatum. A t this point, BO TH
front end and rear end o f axial shaft will have a stack-up
o f one Z E R O race-one bearing-one Z E R O race.
T H R U S T BEAR*
RACE
F R O N T
C Y L IN D E R
HA LF
T H R U S T RACE
C O M P R E S S IN G
FIX T U R E
J -9 3 9 7
H O L D IN G F IX T U R E
J -9 3 9 6
Figure 1D-41 Installing A-6 Rear Thrust Races and Bearings
6. Lubricate ball pockets o f the N o. 1 Piston with 525
viscosity refrigerant oil and place a ball in each socket. U se
balls previously rem oved if they were considered acceptable
for re-use.
7. Lubricate cavity o f a Z E R O SH O E disc with 525
viscosity refrigerant oil and place shoe disc O V E R B A L L
IN F R O N T E N D o f piston (Figure ID -42).
Front end of
piston has an identifying notch in casting web
(Figure
ID -37).
NOTICE:
Exercise care in handling the Piston and
R ing A ssem bly, particularly during assem bly into and
rem oval from the cylinder bores to prevent dam age to
the Teflon piston rings.
SHOE DISCS SHOULD NOT BE INSTALLED ON
REAR of piston during following "Gaging" operation.
8. R otate shaft and axial plate until high point o f axial
plate is over the N o. 1 Piston cylinder bore.
9. Lift the axial shaft assem bly up a little out o f front
cylinder h a lf and h old front thrust race and bearing
assem bly ("zero" race-bearing-"zero" race) against axial
plate hub.
10. P osition N o. 1 Piston over N o. 1 cylinder bore
(notched end o f piston being on bottom and piston
straddling axial plate) and low er the shaft to allow N o. 1
Piston to drop in to its bore (Figure ID -43).
11. Repeat Steps 6 through 10 for Pistons N o. 2 and
N o. 3.
12. N O W IN S T A L L R E A R C Y L IN D E R H A L F
O N T O P IST O N S, aligning cylinder with discharge cross­
over tube h ole in front cylinder half. Tap into place using
a plastic m allet or piece o f clean w ood and ham m er (Figure
ID -44).
13. Position discharge cross-over tube opening between
a pair o f C om pressing Fixture J-9397 b olts to permit access
for feeler gage.
14. Install top plate on Com pressing Fixture J-9397.
Tighten nuts to 15 lb. ft. (20 N -m ) torque using a 0-25 lb.
ft. (0-60 N *m ) torque wrench.
Gaging Procedure (Steps 15 thru 18)
The gaging operations w hich follow have been worked
out on a sim ple basis to establish and provide necessary
running tolerances. T w o gaging procedures are necessary.
The first is made to choose the proper size shoe discs
to provide, at each piston, a .0016" to .0024" total preload
between the seats and the axial plate at the tightest place
through the 360-degree rotation o f the axial plate. The
bronze shoe discs are provided in .0005" variations,
including a basic ZE R O shoe.
The second,
performed at the rear shaft thrust race
and bearing stack-up, is designed to obtain .0 0 2 5 ” to
.0 0 3 0 ” preload between the hub surfaces o f the axial
plate and the front and rear hubs o f the cylinder. A total
4979
Figure 1D-42 Installing A-6 Front Shoe Disc
P IS T O N DR IVE
BALL O N L Y
A T REAR
Figure 1D-43 Installing A-6 Piston During Gaging Operation
REAR NE E D LE
T H R U S T B E A R IN G
A N D "Z E R O ” T H R U S T
RACES
r
F R O N T