Goulds Pumps 3500XD - IOM - Manual (Page 21)

3. Negative Reading - Coupling half Y is to the left of
coupling half X. Correct by sliding driver evenly in
the appropriate direction (Fig. 13).
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.
4. Repeat steps 1 through 3 until indicator P reads .05
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.
COMPLETE ALIGNMENT
A unit is in complete alignment when both indicators A
(angular) and P (parallel) do not vary by more than .05 mm
(.002 in.) when measured at four points 90° apart.
Vertical Correction (Top-to-Bottom)
1. Zero indicators A and P at top dead center (12 o’clock)
of coupling half Y.
2. Rotate indicator to bottom dead center (6 o’clock).
Observe the needles and record the readings.
3. Make corrections as outlined previously.
Horizontal Correction (Side-to-Side)
1. Zero indicators A and 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 the
needle, measure and record the reading.
3. Make corrections as outlined previously.
4. Recheck both vertical and horizontal readings to
ensure adjustment of one did not disturb the other.
Correct as necessary.
NOTE: With experience, the installer will understand
the interaction between angular and parallel and will
make corrections appropriately.
Table 2
ALIGNMENT TROUBLESHOOTING
Problem Probable Cause Remedy
Cannot obtain horizontal
(Side-to-Side alignment,
angular or parallel)
Driver feet bolt bound.
Loosen pump hold down bolts and slide pump and driver
until horizontal alignment is achieved.
Baseplate not leveled
properly, probably twisted.
Determine which corner(s) of the baseplate are high or low
and remove or add shims at the appropriate corner(s) and
realign.
Cannot obtain vertical
(Top-to-Bottom) alignment,
angular or parallel
Baseplate not leveled
properly, probably bowed.
Determine if center of baseplate should be raised or
lowered and correct by evenly adding or removing shims
at the center of the baseplate.
3500XD IOM 8/07
17
3
Fig. 13