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FIG. 31 – REMOVING INTERSTAGE LABYRINTH SEALS
REMOVING LABYRINTH SEALS AND COMPRESSOR
ROTOR
1. Remove the oil reservoir and balance piston ring.
(See Removing the Discharge End Seal Ring and
Balance Piston Seal). (See Figs. 23 & 24).
2. Remove the piston ring housing (28) from the high
stage diffuser and the exit vane plate (190) (Fig.
31). Compressors with 8 vane diffuser and more
than two stages often have internal equalizer tubes.
These tubes will be apparent when the last stage
exit plate has been removed. The tubes must be re-
moved before the diffusers can be disassembled.
YORK INTERNATIONAL
Be careful not to damage cast iron
seals when removing the balance pis-
ton vent tubes. Check the tubes care-
fully for any evidence of damage.
3. Reinstall the oil reservoir and the PRV housing snug
to the casing. Hold each one with three cap screws
(26). Slack off rigging before snugging cap screws.
Tighten snugly. Install assembly bearings to allow
rotor to freely rotate.
4. The diffusers of various compressor models vary in
construction details, but each one essentially con-
FORM 220.11-NM2 (602)
4
LD07347
57
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