A-C Fire Pump 8200 Series - Manual (Page 25)

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12. Remove casing rings (3-003-9) from
impeller (4-002-0).
13. Remove set screw (3-902-9) from shaft
nuts. Remove shaft nuts (3-015-9),
O-rings (3-914-9), sleeves (3-009-9),
interstage bushing (3-231-0), and
impellers (4-002-0).
NOTE: Apply heat uniformly to the shaft
sleeve to loosen the sealant between the
shaft and sleeve.
CAUTION:
DO NOT EXCEED 275°F. Failure to follow
these instructions could result in injury or property
damage.
To further assist in removing the sleeves,
hold the shaft vertically and drop it on a block
of wood. The impeller weight should force
both the impellers and sleeves from the shaft.