poured to expel the air and completely fill the space under the bedplate to the level of the grout
hole. Strike along top of dam with trowel to give a neat finished appearance. Allow grout to hard-
en at least 48 hours.
8.
Tighten foundation bolts.
9.
Tighten pump hold-down bolts.
2.5 Alignment procedures
General
Alignment of the pump and driver is of extreme importance for trouble-free mechanical operation. The
following are suggested steps to establish the initial alignment of the unit.
NOTICE:
This is an initial alignment. The final alignment is done after the unit has been run under actual
operating condition. The final alignment procedure is outlined in
and must be followed. Make sure motor starting switch is locked out to prevent accidental
rotation.
Any coupling manufacturer's instruction sheets, sent with the pump, should be studied and used when
installing, aligning, or servicing coupling. Note that coupling hubs are not necessarily mounted flush with
the shaft ends.
If instructions are not available, the following procedure may be used. The procedure is given for two ba-
sic coupling types:
1.
Flexible Coupling - Normally furnished on all units except back pull-out. Normally not assembled
(except spider-insert type which are pre-assembled).
2.
Flexible Spacer Coupling - Furnished as standard on all back pull-out units. Contains a remova-
ble spacer piece located between coupling hubs.
NOTICE:
Alignment in one direction may alter alignment in another. Check through each alignment pro-
cedure after making any alignment alteration.
Parallel alignment
Unit is in parallel misalignment when the shaft axes are parallel but not concentric. Shift driver as re-
quired.
In order to obtain vertical parallel alignment under actual operating conditions, the driver shaft may have
to be set higher or lower (using thin shim stock) than the pump shaft due to differences in expansion
rates. Pump expansion rates vary with pump design. The following is a suggested cold setting for motor
driven units:
Frame mounted units
Figure 6: Frame mounted units
2.5 Alignment procedures
Model 3415 Installation, Operation, and Maintenance Manual
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