Goulds Pumps 3500XD - IOM - Manual (Page 20)

4. Repeat steps 1-3 until indicator A reads .05 mm (.002
in) or less.
Horizontal Correction (Side-to-Side)
1. Zero indicator A on left side of coupling half Y, 90°
from top dead center (9 o’clock).
2. Rotate indicators through top dead center to the right
side, 180° from the start (3 o’clock). Observe needle
and record reading.
3. Negative Reading - The coupling halves are further
apart on the right side than the left. Correct by either
sliding the shaft end of the driver to the left or the
other end to the right.
Positive Reading - The coupling halves are closer
together on the right side than the left. Correct by
either sliding the shaft end of the driver to the right or
the other end to the left (Fig. 11).
4. Repeat steps 1 through 3 until indicator A reads .005
mm (.002 in.) or less.
5. Re-check both horizontal and vertical readings to
ensure adjustment of one did not disturb the other.
Correct as necessary.
PARALLEL ALIGNMENT
A unit is in parallel alignment when indicator P (parallel
indicator) does not vary by more than .005 mm (.002 in.) as
measured at four points 90° apart at operating temperature.
Note the preliminary vertical cold setting criteria, Table 1.
Vertical Correction (Top-to-Bottom)
1. Zero indicator P at top dead center of coupling (12
o’clock) half Y (Fig. 9).
2. Rotate indicator to bottom dead center (6 o’clock).
Observe needle and record reading.
3. Negative Reading - Coupling half X is lower than
coupling half Y. Correct by removing shims of
thickness equal to half of the indicator reading under
each driver foot.
Positive Reading - Coupling half X is higher than
coupling half Y. Correct by adding shims of thickness
equal to half of the indicator reading from each driver
foot (Fig. 12).
NOTE: Equal amounts of shims must be added to or
removed from each driver foot. Otherwise the vertical
angular alignment will be affected.
4. Repeat steps 1 through 3 until indicator reads within
.05 mm (.002 in.) or less when hot, or per Table 1
when cold.
Horizontal Correction (Side-to-Side)
1. Zero indicator P on the left side of coupling half Y,
90° from top dead center (9 o’clock).
2. Rotate indicators through top dead center to the right
side, 180° from the start (3 o’clock). Observe needle
and record reading.
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3500XD IOM 8/07
Fig. 11
Fig. 12
Fig. 10