5.
Slide rotary unit of mechanical seal (383A) over splined end of pump shaft (122) and against retain-
ing ring (361D). Use care to avoid cutting rubber bellows on splined teeth.
6.
With bearing frame assembly remounted on support structure in the vertical position, bolt casing
adapter (108) to end cover (109C), install O-ring (412K).
7.
Slide splined end of pump shaft (122) into splined insert of stub shaft (380). Ensure rotary seal ring
does not drop out of rotary seal.
8.
Install impeller key (178) in shaft (122).
9.
Check to ensure that the drive collar is properly located. To do this, it is first necessary to be sure
the pump shaft is in its proper operating position, which is with the splined end of the shaft bottomed
in the stub shaft. Push the shaft down firmly until it bottoms in the stub shaft. The mechanical seal
will tend to raise the shaft, pressure must be maintained to keep the shaft bottomed. Lay a straight
edge across the casing adapter and against the shaft. There should be a gap between the top of
the drive collar and the straight edge of up to approximately one-eighth inch. If the drive collar is too
high, a problem exists with parts. recheck the drive collar (524) location to ensure it is seated prop-
erly.
7.4 Reassembly of liquid end
3335 Installation, Operation and Maintenance Instructions
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