Chevrolet 1977 Monte Carlo, Руководство по ремонту

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AIR CO N D ITIO N IN G COMPRESSOR OVERHAUL 1.D-9
Systems"). T h e sam e h olds ture for any disassem bly o f the
internal A -6 com pressor cylinder and shaft assembly.
If the A -6 C om pressor Internal Cylinder and Shaft
A ssem bly is to be serviced or replaced, then the oil in the
com pressor 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 addition o f proper oil
quantity to new 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 im proper com pressor operation.
T h ese 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, w ashing 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.
Piston shoe discs and shaft thrust races w ill be
identified by "number" on the parts them selves for reference
to determ ine their size and dim ension (see Figure ID -38).
A-6 COMPRESSOR SHAFT SEAL
SEAL LEAK DETECTION
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 determ ined
by test.
Should an A -6 com 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
oil in the A -6 com pressor m ust be drained, measured and
replaced according to "C.C.O.T. Refrigerant Oil
Distribution" in the A ir C onditioning section to determ ine
oil loss. T he accum ulator in this A -6 system m ust then also
be rem oved - oil drained - m easured, etc. according to sam e
section.
S P E C I F I C A T I O N P A R T S
S E A L I C A R S O N M A T E R I A L .
L A R G E C H A M F E R O N
I N S I D E D 1 A M T E R .
S E A T ! C E R A M I C M A T E R I A L
W I T H P O L I S H E D
F A C E .
O R I N G S I N E O P R E N E , T H U S
I C A P A B L E O F
: G I V I N G H E A T
R E S IS T A N C E A N D
___________ | L I F E E X P E C T A N C Y .
0858
Figure 1D-20 Specification A-6 and R-4 Compressor Shaft Seal
Kit
Remove
1. "Discharge the Refrigerant System" according to the
D IS C H A R G IN G , A D D I N G OIL, 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
SYSTEM S in the A IR C O N D IT IO N IN G section.
2. R em ove the C lutch Plate and H ub assembly and
shaft key as described in "A-6 C om pressor C lutch Plate and
H ub Assembly" R em oval procedure.
3. Pry out the sleeve retainer and rem ove the absorbent
sleeve. R em ove the shaft seal seat retaining ring, using Snap-
R ing Pliers J-5403 ( # 2 1 ) . See Figure ID -21.
4. 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 dirt or foreign material from getting into
compressor.
5. 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 ID -22). D iscard the Seat.
Figure 1D-21 Removing or Installing A-6 Shaft Seal Seat
Retaining Ring
NOTICE:
D O N O T tighten the handle w ith a wrench
or pliers; however, the handle m ust be hand-tightened
securely to rem ove the seat.
6. W ith Seal P rotector J-22974 still over the end o f the
shaft, seat Seal R em over-Installer J-9392 down over shaft
end,
turning clockwise, while pressing down,
to engage
remover tangs with the tabs on the Seal assembly. Then lift
the Shaft Seal assem bly out (see Figure ID -23). D iscard the
Seal.
7. R em ove and discard the seal seat O -Ring from the
com pressor neck, using O -R ing R em over J-9533 (see Figure
ID -22).
8. R echeck the shaft and inside o f the com pressor neck
for dirt or foreign material and be sure these areas are
perfectly clean before installing new parts.