Goulds Pumps ANSI FAMILY IOM (ATEX Compliant) - IOM - Manual (Page 129)

APPENDIX III
Alignment
Alignment procedures must be followed to
prevent unintended contact of rotating
parts. Follow coupling manufacturer’s
coupling installation and operation
procedures.
SET UP
1. Mount two dial indicators on one of the coupling
halves (X) so they contact the other coupling half
(Y) (Fig. III-1).
2. Check setting of indicators by rotating coupling
half X to ensure indicators stay in contact with
coupling half Y but do not bottom out. Adjust
indicators accordingly.
MEASUREMENT
1. To ensure accuracy of indicator readings, always
rotate both coupling halves together so indicators
contact the same point on coupling half Y. This
will eliminate any measurement problems due to
runout on coupling half Y.
2. Take indicator measurements with driver feet
hold-down bolts tightened. Loosen hold down
bolts prior to making alignment corrections.
3. Take care not to damage indicators when moving
driver during alignment corrections.
ANGULAR ALIGNMENT
A unit is in angular alignment when indicator A
(Angular indicator) does not vary by more that .002 in.
(.05 mm) as measured at four points 90° apart.
Vertical Correction (Top-to-Bottom)
1. Zero indicator A at top dead center (12 o’clock) of
coupling half Y.
2. Rotate indicators to bottom dead center
(6 o’clock). Observe needle and record reading.
3. Negative Reading - The coupling halves are
further apart at the bottom than at the top. Correct
by either raising the driver feet at the shaft end
(add shims) or lowering the driver feet at the other
end (remove shims), (Fig. III-2).
Positive Reading - The coupling halves are
closer at the bottom than at the top. Correct by
either lowering the driver feet at the shaft end
(remove shims) or raising the driver feet at the
other end (add shims).
4. Repeat steps 1-3 until indicator A reads .002 in
(.05 mm) 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.
ANSIFAM IOM - 5/08
127
8
Fig. III-1
Fig. III-2