Chevrolet Chevelle 1977 Repair Manual page 17

OIL PICK-UP TUBE REMOVER J-5139
OIL PICK-UP TUBE
Fig. 28--Removing Oil Pick-U p Tube
head.
D iscard O-ring.
It may be necessary to tap on outside of front head,
using a plastic hammer, to overcome friction of O-ring seal
between front head and compressor shell.
17. Wipe excess oil from sealing surfaces on front head
casting webs and examine sealing surface. If any surface
damage is observed, the head should be replaced.
18. Remove front discharge valve plate assembly and
front suction reed plate. Examine reeds and seats. Replace
necessary parts.
19. Remove suction cross-over cover by prying with
screwdriver between cylinder casting and cover (Fig. 29).
20. Examine internal mechanism for any obvious
damage. If internal mechanism has sustained major damage,
due to loss of refrigerant or oil, it may be necessary to use
the Service internal mechanism Assembly rather than
replace individual parts.
INTERNAL M ECHA NISM
Disassembly
Use Parts Tray J-9402 (Fig. 33) to retain compressor
parts during disassembly.
1. Remove internal mechanism from compressor as
CYLINDER
ASSEMBLY
Fig. 2 9 - R e m o v in g S u c tio n Cross Over Cove r
■ |
AIR CONDITIONING
described in "Compressor Internal Mechanism" Removal
procedure.
means, each piston num bering them as 1,2, and 3 (Fig. 30).
like manner, so th at pistons can be replaced in their original
locations.
mallet (Fig. 31). M ake certain that discharge cross-over tube
does not contact axial plate when separating cylinder halves
(a new Service discharge cross-over tube will be installed
later).
the pistons and set the front cylinder half, with the piston,
shaft and axial plate in Compressing Fixture J-9397.
previously identified as No. 1, with balls and shoe discs,
from axial plate.
or metal particles imbedded in exposed ring surface and
SUCTION
PASS COVER
Piston
Fig. 3 0 - N u m b e r i n g Piston and C y lin d e r Bores
2. Identify by pencil mark, or some other suitable
Num ber the piston bores in the front cylinder half in
3. Separate cylinder halves, using a wood block and
CAUTION: UNDER NO CIRCUMSTANCES
SHOULD SH A FT BE STRU CK A T EITHER
END in an effort to separate upper and lower
cylinder halves because the shaft and the axial
plate could be damaged.
4. Carefully remove the rear half of the cylinder from
5. Pull up on compressor shaft and remove piston
Inspect the Teflon piston rings
a.
Fig. 3 1--Separating C y lin d e r Halves
IB-11
Front
Cylinder Half
SUPPORT
for nicks, cuts