6.7 Reassembly
6.7.1 Install the impeller
CAUTION:
Check for magnetism on the pump shaft and demagnetize the shaft if there is any
detectable magnetism. Magnetism attracts ferritic objects to the impeller, seal, and bearings
which can result in excessive heat generation, sparks, and premature failure.
NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improp-
erly setting the clearance or not following any of the proper procedures can result in sparks,
unexpected heat generation, and equipment damage.
1.
Insert the key (178) into the shaft (122).
2.
Determine the correct positioning of the impeller (101) on the shaft (122).
Facing the coupling-end of shaft, determine the proper rotation of the unit.
3.
For S group pumps, install the retaining ring (361H) in the inboard (coupling-end) retaining groove.
4.
Slide the impeller (101) on the shaft and drive the impeller flush with the retaining ring (361H).
5.
If you are reinstalling the shaft and impeller, then line up the impeller hub with the mark made on the
shaft during disassembly.
6.
Install the shaft sleeve.
Pump group
Instructions
S
1.
Install the retaining ring so that the tapered side is facing the out-
board end of the shaft.
The inward pressure asserted by the double taper automatically cen-
ters the impeller and eliminates lateral play.
The outboard (thrust-end) retaining ring groove and retaining ring
(361H) are tapered.
2.
If the pump does not use the optional sleeve, then you are finished. If the
pump uses the optional sleeve, then continue to complete the following
steps.
3.
Make sure that the shaft is free of dirt, grease, and bonding compounds.
4.
Apply a thin coat of Loctite 635 or equivalent to the shaft sleeve area and
the inside of the sleeve.
5.
Slide the sleeve on the outboard end of the shaft and seat the sleeve firmly
against the shaft shoulder.
M, L, XL
1.
Place the sleeve-to-impeller gasket (428) on the impeller (101).
Make sure that the gasket is aligned with the key (178).
2.
Slide the sleeve (126) onto the shaft.
3.
Slide the O-rings (497) onto the shaft by stretching them over the threaded
end.
6.7 Reassembly
Model 3410 Installation, Operation, and Maintenance Manual
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