Chevrolet 1977 10 Series, Repair Manual, Page: 24 / 468

IB-18
OVERHAUL MANUAL
cross-over tube with the hole in the rear half of the cylinder.
8. When all parts are in proper alignment, tap with a
clean wood block and mallet to seat the rear half of the
cylinder over the locating dowel pins. If necessary, clamp
the cylinder in Compressing Fixture J-9397, to complete
drawing the cylinder halves together.
9. Generously lubricate all moving parts with clean 525
viscosity refrigerant oil and check for free rotation of the
parts.
10. Replace the suction cross-over cover (Fig. 55).
Compress the cover as shown to start it into the slot, and
then press or carefully tap it in until flush on both ends.
A-6 COMPRESSOR INTERNAL M EC H A N ISM
Re-Install
1. Place internal mechanism on Internal Assembly
Support Block J-21352, with
rear-end
of shaft in block
hole.
2. Now install new O-ring and bushing on
front-end
of discharge cross-over tube (Fig. 56). The O-ring and
bushing are Service parts only for internal mechanisms that
have been disassembled in the field (see Fig. 52).
3. Install new dowel pins in front cylinder half, if
previously removed.
4. Install front suction reed plate on front cylinder half.
Align with dowel pins, suction ports, oil return slot, and
discharge cross-over tube (Fig. 57).
5. Install front discharge valve plate assembly, aligning
holes with dowel pins and proper openings in front suction
reed plate (Fig. 58).
Front discharge plate has a large diam eter hole in the
center (Fig. 59).
6. Coat sealing surfaces on webs of com pressor front
head casting with 525 viscosity refrigerant oil.
7. Determ ine
exact
position of front head casting in
Fig. 5 3--I n sta 11 i ng D is c h a rge Cro ss ove r T ub e
Fig. 54--A-6 Pistons P o sit io n e d in S ta ir -S te p A r r a n g e m e n t
relation to dowel pins on internal mechanism. M ark
position of dowel pins on sides of front head assembly and
on sides of internal mechanism with a grease pencil.
Carefully lower front head casting into position (Fig. 61),
making certain th a t sealing area around center
bore of head assembly does not contact shaft
as
head assembly is lowered.
Do not rotate head
assembly
to line up with dowel pins, as the sealing areas
Fig. 5 5-- In sta llin g S u c tio n Cr oss-ove r Cover
PISTONS IN " S T A I R S T E P " POS ITION
R EA R T H R U S T
RACES A N D
B E A R I N G
F R O N T
C Y L I N D E R H A L F
COM PRESSING F IX T U R E