12
6. Place valve guide assembly on valve plate. Tighten all bolts
and bend tabs on lock washer and lock plates. Replace cylin-
der head.
Fig. 14 — Suction and Discharge Valve Assembly
Fig. 15 — Valve Clips in Place Cylinder and
Unloader Sleeves
DISASSEMBLY
Remove cylinder head, suction and discharge valve assembly, and
pump-end bearing head. Whenever cylinder sleeve or valve plate
is replaced, use a new suction valve disc. (See Fig. 16.)
1. Tum crankshaft until piston is in mid-position.
2. Insert a sleeve puller into cylinder and push it down onto top
of piston.
3. Tighten nut on top of sleeve puller to expand puller in sleeve.
4. Tum crankshaft, forcing sleeve upward until it can be
removed.
5. Remove unloader snap rings (5H compressors only). Disas-
semble un1oader sleeve, pins and springs.
INSPECTION
Examine bore of sleeve for wear. Check suction valve seats for
scratches and wear. Check unloader sleeves, pins and springs for
wear and freedom of movement. (See Table 5.)
REASSEMBLY
When new rings are being installed in a used cylinder sleeve,
break the hard, glazed surface of cylinder sleeve to reduce wear-
ing-in period of new rings. Clean sleeves thoroughly after break-
ing glaze.
To reassemble:
1. Rotate crankshaft to position piston at top center.
2. Lubricate piston rings and beveled surface at lower edge of
cylinder sleeve.
3. Stagger ring gaps around piston.
4. With turning motion, work sleeve over piston and rings.
Compress and align each ring with beveled edge of sleeve.
5. Seat sleeve in suction manifold partition and cylinder deck
recess.
6. Rotate sleeve so that any 2 valve lifter-pin holes lie equal dis-
tances from longitudinal axis of compressor (see Fig. 16). In
this position, lifter pins line up with suction valve springs.
Fig. 16 — Position of Cylinder Sleeves
CAUTION
Never operate compressor with heads or valve plate removed.
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