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Service
moving Driven/Drive Coupling Disk). Remove the com-
pressor shaft seal. (Refer to Removing the Shaft Seal).
Remove the oil sump cover, the oil pump assembly and
thrust bearings. (Refer to Removing Oil Pump Assem-
bly). Although the drive shaft doesn't have to be re-
moved to lift the casing top half, it may be easier to
work if it is removed. (Refer to Removing Compressor
Drive Shaft).
1. Read instruction Preparation for Service thoroughly.
FIG. 29 – LIFTING TOP HALF OF COMPRESSOR
CASING
2. Remove cap screws (26) that hold the PRV assem-
bly and oil reservoir to top half of casing. Remove
cap screws Fig. 4B, which secure horizontal joint
the top half of the compressor casing to the bottom
half of the casing. Loosen the remaining cap screws
(26) in the PRV and oil sump flanges so that both
can be pulled back approximately 1/8-1/4".
Some model compressors have four
cap screws assembled from the bottom
half of casing to the top half. These
screws must be removed to remove the
top casing half.
3. Remove the four casing flange dowel pins (115)
and nuts (116).
4. Screw the four guide studs (shipped with the tools)
into four of the holes from which the casing cap
56
screws were removed – one stud near each cor-
ner. The purpose of guide studs is to insure that the
casing is being lifted, or lowered, evenly to avoid
damaging internal parts (See Fig. 29).
5. Using four of the cap screws (removed from the
casing flange) as jack screws, turn the screws up
into their tapped holes in each corner of the lower
casing flange until the ends of the screws bear
against the underside of the top casing flange. Nor-
mally, four jack screw holes are furnished with two
pry positions provided at the corner nearest the suc-
tion connection and discharge connection.
6. Carefully break the horizontal joint by turning the
jack screws evenly about 1/4 a turn at a time until
the top half is free. Use a knife or flat tool to sepa-
rate the top flange from the gasket (1). Make sure
a new gasket (1) is available for replacement.
Remove the vent tube between the
casting and PRV housing. Before at-
tempting to lift the top 1/2 of the
compressor.
7. With a chain hoist rigged to the lifting hooks cast
into the upper casing half, check the level and care-
fully lift the casing vertically until it is clear of the
LD07345
guide studs (See Fig. 29). Place the top casing on
blocks and remove the jack screws from the lower
casing flange.
FIG. 30 – AFTER LIFTING TOP HALF OF COM-
PRESSOR CASING WITH SUMP HOUS-
ING REMOVED
FORM 220.11-NM2 (602)
LD07346
YORK INTERNATIONAL
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