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1/2 value. With the one piece cover just slide
it over the pins and torque to approximately
1/2 value.
7. After positioning the oil pump housing, check the
axial clearance of the rotor. Set up a dial indicator
on the compressor shaft to read to a reference point.
Shift the rotor axially to the full extent, forward
and reverse. The difference is the axial thrust clear-
ance (See Fig. 22). Add or remove pump housing
gaskets as necessary to achieve axial clearance
within specifications. When the axial spacing is
acceptable, torque the pump housing bolts to full
value and recheck the axial clearance. Readjust if
required.
8. Before installing the oil jet pump be sure the nozzle
is free of dirt and the jet pump body isn't dam-
aged. Check to insure all the 90 degree elbow
clamping nuts are tight after the jet body rests on
the nozzle bolted solidly into place.
REMOVING DISCHARGE END SEAL RING AND
BALANCE PISTON SEAL RING (REFER TO FIGS. 23,
24 AND 25, AND TABLE 14)
If it becomes necessary to replace the discharge end
seal ring or the balance piston seal ring, the oil reser-
voir housing must be removed.
FIG. 23 – REMOVING THE OIL RESERVOIR
50
Proceed as follows:
1. Refer to Removing Oil Pump, Thrust Bearings, and
Oil Reservoir End Journal Bearing.
2. Remove all oil tubing (piping) and electrical con-
nections attached to the reservoir.
3. Remove cap screws from the flange holding the
oil reservoir in place. Insert guide pins in the holes.
Install a cardboard tube around the shaft, or if
equipped with probes, install the protective sleeve.
4. Insert oil reservoir guide pins and remove cap
screws (Fig. 20) which secure the oil reservoir hous-
ing to the compressor casing.
5. Support the weight of the oil reservoir from a chain
hoist. Use jacking screws through the oil reservoir
flange and carefully ease the oil reservoir out of
the compressor casing. The seal ring, housing (36)
is bolted to the back of the oil reservoir. A piston
ring (31) is used to seal between the balance pis-
ton space and the compressor discharge and is lo-
cated in the oil reservoir.
It may be necessary to loosen several
bolts (6-8) back to the compressor split
line to minimize interference of the
casing to the oil reservoir (or PRV
housing).
FORM 220.11-NM2 (602)
LD07339
YORK INTERNATIONAL
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