SVCN 7 INSTALLATION, OPERATION, & MAINTENANCE
20. Tighten hold down bolts, then repeat steps 11 through 19.
21. Remove dial indicators and brackets and detach lifting equipment.
22. See paragraph 2.1.2, “Piping”, on page 2-1, and connect piping, as required.
23. Repeat steps 10 through 18 above and record readings. If TIR at either position of dial
indicator exceeds 0.002 in (0.05 mm), correct distortion caused by piping, and recheck
alignment; pump, piping, and driver must be secured in correct alignment before proceeding
with hot alignment.
NOTE
Steps 24 and 26 apply only if your coupling is the gear type.
24. Install flat strap across hub of driver half-coupling by bolting to flange in two places.
NOTE
Unless hub is strapped down, it will vibrate when the motor
is started in step 24.
25. Briefly operate driver in accordance with manufacturer's instructions and observe rotation of
shaft; its rotation must correspond to the direction in which the pump is designed to turn.
26. Remove flat strap.
27. Secure coupling spacer between half-couplings, if not done previously.
28. Install coupling guard.
2.2.6 HOT ALIGNMENT
CAUTION
Gear-type couplings must be lubricated before running pump
(see coupling manufacturer's instructions).
After completing a cold alignment of driver and pump, but before the pump is allowed to operate for
an extended period, the pump must be operated for a short period until it reaches normal operating
temperature (see paragraphs 3.4.3 and 3.4.5), then shutdown (see paragraph 3.4.6). Check the
alignment immediately after shutdown (ideally, within 10-15 minutes) in order to determine whether
the centerlines of the driver and pump shafts coincide when both units are hot. This coincidence is
necessary to assure efficient extended operation of the pump. Requirements for a hot alignment check
are:
1. Remove coupling guard.
2. Complete steps 10 through 18 of paragraph 2.2.5 starting on page 2-10 above.
NOTE
TIR in either the vertical or horizontal plane shall not
exceed 0.002 in (0.05 mm). Readings on opposite sides must
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