WIK USER INSTRUCTIONS ENGLISH BO2662 5/09
Page 20 of 76
4) That pump hold down bolts are tight.
5) That suction and discharge piping is not
connected to pump until after completion of
initial cold alignment;
6) That the pads on baseplate or soleplate(s) and
driver feet are thoroughly cleaned.
For installation of keyless coupling using
hydraulic pressure, see the coupling installation
drawing in the back of this manual; or refer to the
coupling manufacturer's instructions in section 10.
4.5.5 Installing coupling
For an outline of coupling removal and installation
tasks, see section 6.7.2 and section 6.9.8.
4.5.6 Alignment procedure
You should begin work by aligning the centerline of
the baseplate of the principal unit, usually the turbine
or the high-speed pump, with your plant's
benchmarks, thereby establishing a common
centerline with which the centerlines of the other
baseplates that are in train may be. Proceed with
your aligning and leveling work as follows:
1) Verify that your foundations as described under
section 4.3 have had ample curing time;
otherwise they may not support weight of
baseplates and operating units.
2) To assure sufficient grouting, provide for a
minimum space of 25 mm (1 in.) between
baseplates and their foundations by placing
shims adjacent to each foundation bolt hole or
beneath each leveling screw.
3) Set all baseplates on shims or leveling screws,
bending anchor bolts as necessary to align them
with holes in baseplates.
Pump feet and their hold down bolts are
inaccessible with lagging in place.
4) Remove lagging, if installed, from top of pump;
also, to eliminate any torsional affect that the
pump might exert on baseplate, loosen hold
down bolts at each pump foot.
5) Thoroughly clean surfaces of all mounting pads
including exposed edges of pads at each pump
foot.
If foundation bolts prevent precise
alignment, relocate them to ensure that the
centerline of every baseplate will match the common
centerline; also, before making a final check of the
centerlines for exact match, the baseplate should be
almost level.
6) Using optical alignment equipment, align
centerline of every baseplate within 0.38 mm
(0.015 in.) of a common centerline.
7) Level each baseplate using optical alignment
equipment or machinist level on shims and/or
leveling screws within the required leveling
gradient of 0.05 mm per 305 mm (0.002 in. per
12 inches). If a machinist level is used, ensure
that the baseplate is leveled lengthwise and
crosswise at both ends. Then tighten down
anchor nuts and recheck for nominal gradient. If
baseplate is not level, loosen anchor nuts, re-
Ievel it, retighten nuts, and recheck for nominal
gradient. Continue this process until each
baseplate is anchored and level.
8) Set units (that is, driver, pump, etc.) in place on
baseplates (or soleplates) and loosely install
enough hold down bolts in each unit to ensure
that all holes in units and baseplates (or
soleplates) line up.
9) Install half-couplings on shafts.
Check hubs for run out or possible bent
shaft conditions before attempting alignment of units.
10) Check alignment of all connectable shafts as
described by the following steps.
a) Determine the distance from the bracket
mounting point to the indicator reading point.
b) Securely attach the bracket to a length of
rigid pipe, and install the indicator at the
distance determined in the previous step a
above. (See
Figure 4-4
Determining Bar
Sag below)
BRACKET SPAN
PIPE
BRACKET
DIAL INDICATOR
Figure 4- 4 :
Determining Bar Sag
c) Hold the pipe with the indicator facing up
and set at "0". Without touching bracket,
rotate the pipe 180° so that the indicator is
facing down. Read the indicator and record
the reading. This is the amount of bar sag.
d) Rotate the pipe again so that indicator is
facing up. It must return to "0".
e) Repeat the two previous steps c and d
above to confirm reading.
