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CUSTOM AIR CONDlTlONlNG
18-41
SYSTEM O F REFRIGERANT and a new valve and gasket
installed
(see
DISCHARGING,
ADDING
OIL,
EVACUATING AND CHARGING PROCEDURES FOR
C.C.O.T. A/C SYSTEMS).
- .
Fig. 18-50 1977 A-6 High Pressure Relief Valve
A-6 COMPRESSOR INTERNAL
MECHANISM
Service operations to the rear head or internal
mechanism of the compressor "should be performed with the
compressor removed from the vehicle to insure that the
necessary degree of cleanliness may be maintained. Clean
hands, clean tools and a clean bench, preferably covered with
clean paper, are of extreme importance.
An inspection should be made of the internal mechanism
assembly to determine if any service operations should be
performed. A detailed inspection of parts should be made to
determine if it is economically feasible to replace them.
Remove
1. Before proceeding with disassembly, wipe exterior
surface of compressor clean.
2. All oil in compressor should be drained and measured.
Assist draining by positioning compressor with oil drain plug
down. Record the amount of oil drained from the
compressor
3. Invert compressor and Holding Fixture J 9396 with
front end of compressor shaft facing downward (Fig. 1B-5 I).
Additional oil may leak from the compressor at this
time. All oil must be drained into a container so that TOTAL
amount
can
be measured. A liquid measuring cup may be
used for this purpose. Drained oil should then be discarded.
4. Remove four locknuts from threaded studs on
compressor shell and remove rear head. Tap uniformly
around rear head if head is binding (Fig. 1B-51).
5. Wipe excess oil from all sealing surfaces on rear head
casting webs, and examine sealing surfaces (Fig. 1B-52). If
any damage is observed, the head should be replaced.
6. Remove suction screen and examine for any damage
or contamination. Clean or replace if necessary.
7. Paint an identifying mark on exposed face of inner and
outer oil pump gears and then remove gears. Identifying
Fig. 18-5 1 1977 A-6 Compressor Installed in Holding
Fig. 18-52 1977 A-6 Rear Head Removal
marks are to assure that gears, if reused, will be installed on
identical position.
8. Remove and discard rear head to shell O-ring.
9. Carefully remove rear discharge valve plate assembly.
Use two small screwdrivers under reed retainers to pry up
on assembly (Fig. 1B-53). Do not position screwdrivers
between reeds and reed seats.
10. Examine valve reeds and seats. Replace entire
assembly if any reeds or seats are damaged.
11. Using two small screwdrivers, carefully remove rear
suction reed (Fig. 1B-54). Do not pry up on horeshoe-
shaped reed valves.
12. Examine reeds for damage, and replace if necessary.
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