Chevrolet 1977 10 Series, Repair Manual, Page: 16 / 468

IB-10
OVERHAUL MANUAL
Fig. 2 4 - C o m p r e s s o r I n s ta lle d in H o ld in g Fixture
REAR
HEAD
SHELL
HOLDING
FIXTURE
3. Invert compressor and Holding Fixture J-9396 with
front end of compressor shaft facing downward. (Fig. 24).
A dditional oil may leak from compressor at this time.
All oil must be drained into a container so th at TO TA L
am ount can be measured. A liquid measuring cup may be
used for this purpose. D rained 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. 24)
5. W ipe excess oil from all sealing surfaces on rear head
casting webs, and examine sealing surfaces (Fig. 25). If any
damage is observed, the head should be replaced.
6. Remove suction screen and examine for any damage
or contam ination. Clean or replace if necessary.
7. Paint an identifying m ark on exposed face of inner
and outer oil pum p gears and then remove gears. Identifying
marks are to assure that gears, if reused, will be installed
REAR D IS C H A R G E REED R ETA IN ERS
Fig. 2 6 - R e m o v i n g Rear D is c h a r g e V alve Plate
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. 26).
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. 27).
Do not pry up on horseshoe­
shaped reed valves .
12. Examine reeds for damage, and replace if necessary.
13. Using Oil Pick-Up Tube Rem over J-5139 (Fig. 28),
remove oil pick-up tube. Remove O-ring from oil inlet.
14. Loosen com pressor from Holding Fixture J-9396,
place Internal Assembly Support Block J-21352 over oil
pump end of shaft and, holding Support Block in position
with one hand, lift compressor from Holding Fixture with
other hand. Invert com pressor and position on bench with
Internal Assembly Support Block resting on bench.
15. Lift front head and com pressor shell assembly up,
leaving internal mechanism resting on Internal Assembly
Support Block.
CAUTION: To prevent damage to shaft, DO N O T
TAP O N EN D OF COMPRESSOR SH AFT to
remove internal mechanism. I f mechanism will
not slide out o f compressor shell, tap on front head
with a plastic hammer.
16. Rest com pressor shell on its side and push front
head assembly through compressor shell,
being careful
not to damage sealing areas on inner side of front
E A L IN G
S U R F A C E S
U C T IO N SC R E E N
EAR H E A D
HELL T O H E A D
O ' R IN G
O IL P U M P
R O T O R S
R e a r
Suction R ee d
Fig. 2 5 -R e ar Head Removal
Fig. 27-R em oving Rear Suction Reed