Goulds Pumps 3296M - IOM - Manual (Page 18)

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. 7B).
4. Repeat steps 1 through 3 until indicator A reads
.002 in. (.05 mm) 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 .002 in.
(.05 mm) as measured at four points 90° apart at
operating temperature. Note the preliminary 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. 6).
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. 8A).
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 P reads
within .002 in. (.05 mm) 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. Observe needle and
record reading (3 o’clock).
3. Negative Reading - Coupling half Y is to the left
of coupling half X. Correct by sliding driver
evenly in the appropriate direction (Fig. 8B).
Positive Reading - Coupling half Y is to the
right of coupling half X. Correct by sliding driver
evenly in the appropriate direction.
NOTE: Failure to slide motor evenly will affect
horizontal angular correction.
14
3296 M Group 6/05
Fig. 7B
Fig. 8A
Fig. 8B