WIK USER INSTRUCTIONS ENGLISH BO2662 5/09
Page 28 of 76
18) Check hold down bolt positions on the graph or
otherwise determine the amount of shims to be
added for the vertical correction, and the
movement required for the horizontal correction,
if either exceeds maximums. If maximums are
exceeded:
a) Release driver hold down bolts, if installed
b) Using lifting equipment, lift driver and shim
under feet for height correction
Jacking bolts, if installed should control
horizontal movements.
c) Place dial indicators at the base adjacent to
the inboard and outboard hold down bolt
area so that the exact amount of horizontal
movement can be controlled;
d) Make necessary horizontal corrections while
monitoring with indicators;
e) Repeat steps 11 through 19 above to verify
alignment setting.
19) Torque hold down bolts using procedure
specified in section 10.3, then repeat step 10
through 18.
20) Remove dial indicators and brackets and detach
lifting equipment.
21) Check both pump and driver for soft foot at each
hold down bolt as follows:
a) Tighten all hold down bolts to the torque
recommended by the equipment
manufacturer.
b) Install a dial indicator to read the vertical
motion of an equipment foot. Loosen the
hold down bolt for that foot until it is finger
tight. Record the vertical motion of the
equipment foot. The vertical motion should
not exceed 0.05 mm (0.002 in.). Re-torque
the hold down bolt to the recommended
torque.
c) Repeat step b above for all remaining
equipment feet on the baseplate.
22) See section 4.6.1, and connect piping, as
required.
23) Repeat steps 11 through 18 above and record
readings. If TIR at either position of dial indicator
exceeds 0.05 mm (0.002 in.), correct distortion
caused by piping, and recheck alignment; pump,
piping, and driver must be secured in correct
alignment before proceeding with hot alignment.
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.
Unless hub is strapped down, it will vibrate
when the motor is started in step 25.
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 previously done.
28) Install coupling guard.
29) Using a machinist's scale, ensure that the
aligning key underneath the discharge end of
the casing is aligned within 0.79 mm (0.031 in.)
of the exact center of the keyway in the pump
casing [1100]. If not, then reposition the aligning
key and recheck the alignment.
. Gear-type couplings must be
lubricated before running pump (see coupling
manufacturer's instructions in the section 10).
4.8.4 Hot alignment
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 section 5.7 and section 5.8), then
shutdown (see section 5.9).
Check the alignment immediately after shutdown
(ideally, within 10-15 minutes thereof) 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. The dial indicators,
brackets, and shims should be available at the pump
before shutdown. Requirements for a hot alignment
check are:
1) Remove coupling guard.
2) Remove coupling spacer, if applicable.
3) Complete step 9 through 17 under COLD
ALIGNMENT (section 4.8.3) above.
TIR in either the vertical or horizontal
plane shall not exceed maximum allowable (see
section 10.3). Readings on opposite sides must be
opposite signs. Total angularity must not exceed
0.03 mm per 305 mm (0.001 in. per 12 inches).
