Goulds Pumps AF (Axial Flow) (6"-36) MXR Bearings" - Manual (Page 26)

24 AF (6-36) IOM
Good alignment is achieved when the dial indicator
readings, for both parallel and angular misalignment,
are .003" (.076mm) Total Indicated Reading (T.I.R.)
or less when the pump and driver are at operating
temperature (Final Alignment). Fig. 19 describes
what to look for.
1. Mount two dial indicators off one half of the
coupling (X) so they contact the other coupling
half (Y) (Fig. 20).
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 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.
Keep this instruction manual handy for reference.
Further information can be obtained by contacting the
Goulds Pumps, Ashland Operations, 500 E. Centre
St. Ashland, Pa 17921 or your local representative.
ALIGNMENT PROCEDURE
On gear driven AF pumps angular and parallel
misalignment are corrected in the vertical direction by
means of shims under the motor or gearbox mounting
feet, and in the horizontal direction by adjusting bolts
that slide the motor or gearbox in the proper direction.
After each adjustment, it is necessary to recheck the
alignment of the coupling halves. Adjustment in one
direction may disturb adjustments already made in
another direction. It should not be necessary to adjust
the pump in any way.
ANGULAR ALIGNMENT
Couplings are in angular alignment when indicator “A“
(Angular Indicator), Fig 20, does not vary by more than
.003” (.076mm) as measured at four points on the
coupling periphery 90
 apart at operating temperature.
Outlined below are two acceptable methods to achieve
the desired alignment.
METHOD 1 - Dial Indicator Method
For steps 1 through 5 refer to Fig. 21.
1. Zero indicator “A” at position 1 of coupling half (Y).
Mark this position on both flanges.
2. Rotate both flanges 180
 to position 3. Observe
needle and record reading.
3. Negative Reading - The coupling halves are
further apart at position 3 than position 1.
Positive Reading - The coupling halves are closer
at position 3 than position 1.
4. Correct any misalignment by shimming the under
the motor or gearbox feet to attain the proper
alignment.
Directions for viewing coupling
View from front end of pump
Fig. 21
Fig. 20