WIK USER INSTRUCTIONS ENGLISH BO2662 5/09
Page 26 of 76
1) Make certain that driver end space has been
established and that driver is positioned on
clean mount pads with the space between driver
and pump shafts as specified on the Outline
drawing in section 8 (see
Figure 4-10
Measuring Distance Between Ends Of Pump
And Driver Shafts above).
2) Verify that half-couplings are installed (see
section 4.5.5).
3) Attach dial indicator bracket to driver half-
coupling or shaft. Bracket must be rigid for
accurate readings.
4) Set the bracket to the horizontal (9 o'clock)
position and rotate both shafts 180 degrees to
the 3 o'clock position. Total indicator reading
(TIR) in horizontal plane (between 9 o'clock and
3 o'clock points) shall not exceed maximum
allowable TIR (see section 10.3). If TIR is
excessive:
a) Hold distance between half-couplings and
move driver frame to correct alignment in
horizontal plane
b) Again rotate shafts and check readings
c) Repeat steps a and b until maximum
allowable TIR in horizontal plane is not
exceeded.
5) Reverse position of dial indicator and bracket
and repeat step 4 above.
6) Remove dial indicator and bracket.
7) Scribe location of hold down bolts on mounting
pads, then remove driver from pad.
8) Drill and tap hold down bolt holes.
Since an accurate cold alignment is
dependent upon both pump and driver being at
ambient temperature, circulating oil (if applicable)
must also be at ambient temperature.
4.8.3 Cold alignment
The term "cold alignment" refers to the alignment of
pump and driver when they are at ambient
temperature. Since thermal growth affects their
alignment, cold alignment should be considered a
preliminary yet essential task that must be
performed diligently before the pump is operated for
the first time. To bring the driver shaft in cold
alignment with pump shaft, proceed as follows:
1) Verify that the requirements of the following
paragraphs in this subsection have been
satisfied:
a) Alignment Preconditions
b) Installing Coupling
c) Setting Driver Shaft End space
d) Tapping Driver Mount Pads
2) Attach lifting equipment to driver and set it on its
mount pads.
3) Check hubs for run out or possible bent shaft
conditions and correct, if necessary, before
proceeding with alignment.
When using a double-reverse dial indicator
setup, each bracket must be checked for bar sag.
Do not assume that similar brackets have identical
sag.
4) Determine the distance from the bracket
mounting point to the indicator reading point.
5) Securely attach the bracket to a length of rigid
pipe, and install the indicator at the distance
determined in step 4 above. (See
Figure 4-4
Determining Bar Sag)
6) Hold the pipe with the indicator facing up and set
at "0". Without touching bracket, rotate the pipe
180 degrees so that the indicator is facing down.
Read the indicator and record the reading. This
is the amount of bar sag.
7) Rotate the pipe again so that indicator is facing
up. It must return to "0".
8) Repeat steps 6 and 7 to confirm reading.
AII indicator readings must be taken on the
opposite bracket or coupling hub or shaft. They must
be recorded as viewed from the fixed unit (see
Figure 4-5
Alignment Orientation).
9) Attach one bracket to the driver coupling hub or
shaft, and the other to the pump hub or shaft.
Each indicator will read on the opposite bracket,
coupling hub, or shaft. (See
Figure 4-6
Dial
Indicator Setup for Alignment)
10) Set the bar sag amount(s) determined in steps 4
through 8 above into the indicator(s) as a plus
amount (example: an indicated -0.003 would be
set in as a +0.003) while in the upright (12
o'clock) position.
Use of a shaft alignment graph, such as
Flowserve Shaft Alignment Calculator (see
Figure 4-
11
Shaft Alignment Calculator) aids and simplifies
the alignment process. Further information may be
obtained through the Flowserve service department.
