Chevrolet 1977 Monte Carlo, Руководство по ремонту

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AIR CO N D ITIO N IN G COMPRESSOR OVERHAUL 1 D-35
disassem bly o f the internal R -4 com pressor cylinder and
shaft assem bly.
If the R -4 C om pressor Internal C ylinder and Shaft
A ssem bly is to be serviced or replaced, then the oil in the
R -4 com pressor m ust be drained, m easured and replaced
according to "C.C.O.T. Refrigerant Oil Distribution" in the
A ir C onditioning section to determ ine addition o f proper oil
quantity to n ew assembly.
A clean workbench, preferably covered with a sheet o f
clean paper, orderliness in the work area and a place for all
parts being rem oved and replaced is o f great im portance, as
is the use o f the proper, clean service tools. A n y attem pt to
use m ake-shift or inadequate equipm ent m ay result in
dam age a n d /o r improper com pressor operation.
These procedures are based on the use o f the proper
service tools and the condition that an adequate stock o f
service parts is available. A ll parts required for servicing the
internal com pressor are protected by a preservation process
and packaged in a m anner w hich w ill elim inate the necessity
o f cleaning, washing or flushing o f the parts. The parts can
be used in the internal assem bly just as they are rem oved
from the service package.
R-4 COMPRESSOR SHAFT SEAL
Seal Leak Detention
A shaft seal should not be changed because o f an oil-
line on the hood insulator. T he Seal is designed to seep som e
oil for lubrication purposes. O nly change a Shaft Seal when
a leak is detected by evidence o f oil sprayed in large am ounts
and then only after actual refrigerant leakage is determined
by test.
Should an R -4 C om pressor Shaft Seal ever have to be
replaced because it was determ ined to be the cause o f
excessive signs o f oil leakage in the A /C system , then the
accum ulator in this R -4 system m ust also be rem oved from
the vehicle; the oil in the accum ulator then m ust be drained,
m easured and replaced according to "C.C.O.T. Refrigerant
O il Distribution" in the A ir C onditioning section to
determ ine oil loss.
R-4 COMPRESSOR SHAFT SEAL
REPLACEMENT
Remove (On Car)
1. "Discharge the Refrigerant System" according to the
D IS C H A R G IN G , A D D I N G O IL, E V A C U A T IN G A N D
C H A R G IN G P R O C E D U R E S F O R C.C .O .T. A /C
SYSTE M S in the A IR C O N D IT IO N IN G section.
2. Loosen and reposition com pressor in m ounting
brackets.
3. R em ove Clutch Plate and H ub assembly from
com pressor as described in "R-4 C om pressor Clutch Plate
and H ub Assem bly" R em oval procedure.
4. R em ove the shaft seal seat retainer ring using Snap
R ing Pliers J-5403 # 2 1 ) . See Figure ID -21.
5. T horoughly clean inside o f com pressor neck area
surrounding the shaft, the exposed portion o f the seal seat
and the shaft itself.
This is absolutely necessary to
prevent any d irt or foreign material from getting
into compressor.
6. Place Seal Protector J-22974 over the end o f the shaft
to prevent chipping the ceram ic seat. Fully engage the
knurled tangs o f Seal Seat R em over-Installer J-23128 into
the recessed portion o f the seal seat by turning the handle
clockwise.
R em ove the Seal Seat from the com pressor w ith
a rotary-pulling m otion (Figure IB -93). D iscard the Seat.
NOTICE:
D O N O T tighten the handle with a wrench
or pliers; however, the handle m ust be hand-tightened
securely to rem ove the Seat.
Figure 1D-93 Removing R-4 Ceramic Seal Seat (On Car)
7. W ith Seal Protector J-22974 still over the end o f the
shaft, set Seal R em over-Installer J-9392 down onto shaft
end, turning
clockwise, while pressing down
to engage
Rem over tangs with the tabs on the Seal assembly. Then lift
the Shaft Seal assem bly out (see Figure IB -94). D iscard the
Seal.
Figure 1D-94 Removing R-4 Seal (On Car)
8. R em ove and discard the seal seat O-ring from the
com pressor, neck using O -R ing R em over 9553 (Figure 1D-
95).
9. R echeck the shaft and inside o f the com pressor neck
for dirt or neck foreign m aterial and be sure these areas are
perfectly clean before installing new parts.
Inspection
Seals should not be re-used. A lw ays use a new
specification service seal kit on rebuild (see Figure ID -20).
Be extrem ely careful that the face o f the Seal to be installed
is not scratched or dam aged in any way. M ake sure that the
C f 'R A . M I C
S E A L j
SEAT I