Goulds Pumps 3498 - IOM - Manual (Page 26)

Method 2 - Dial Indicators (Fig. 10):
A dial indicator can be used to attain more accurate
alignment.
Fasten the indicator stand or magnetic base to the pump
half of the coupling and adjust the assembly until the
indicator button is resting on the other half coupling
periphery.
Set the dial to zero and chalk mark the coupling half where
the button rests. Also place a separator between the
coupling halves so bearing slack does not affect the
readings. (Chalk and separators are not necessary on the
elastomeric couplings that have not been disconnected.)
Rotate both shafts by the same amount; i.e., all readings
must be made with the button on the chalk mark.
The dial readings will indicate whether the driver has to be
raised, lowered or moved to either side. Accurate alignment
of shaft centers can be obtained with this method even
where faces or outside diameters of the coupling are not
square or concentric with the bores. After each adjustment,
recheck both parallel and angular alignments.
Permissible coupling misalignment should be per the
coupling manufacturer's recommendation.
NOTE: Gross deviations in squareness or concen-
tricity may cause rotation unbalance problems and if
so must be corrected.
DOWELING
Pump units may, if desired, (or required in specification) be
doweled on diagonally opposite feet. This should not be
done until the unit has been run for a sufficient length of
time and alignment is within the above alignment tolerance.
3498 IOM 12/04
23
3
Fig. 10