29
2005 Doctor Martin Luther King Jr Street
Indianapolis, IN 46202
Rev 07-2021
Check the threads and faces of the
bottom of the top shaft for any nicks or
burrs, and correct as required. Wire
brush and clean the threads with solvent.
Coat the threads and face with anti-seize
compound.
Lift the top shaft up and center it in
the hollow shaft of the motor prior to
lowering it. Lower it slowly through the
motor hollow shaft.
As the lower end of the shaft comes
out the bottom of the motor hollow shaft,
check for any foreign material on the
face and threads of the shaft that may
have been picked up while the shaft was
being lowered.
Prior to lowering the shaft into the
coupling, remove the protective plastic
or cloth. Check to be sure the coupling
center hole is still at the face of the head
shaft.
While holding the coupling in place,
screw the top shaft into the coupling
until the faces mate. Approximately the
same number of threads should be
exposed outside the coupling on both
ends, if the coupling is properly
centered.
With the top shaft tightened to the
head shaft, go to the top of the motor and
check to see if the top shaft is concentric
with the motor hollow shaft, and that the
motor shaft rotates freely when turned
by hand.
If the top shaft is not concentric
with the hollow shaft of the motor,
determine the cause of the eccentricity.
Eccentricity may be due to a bent shaft
section or to misalignment caused by
foreign particles between butting ends of
shaft sections or between the discharge
head and column flange.
Mark where the shaft is leaning
toward the motor hollow shaft, lift up on
the pump shaft, and rotate it 180°. If the
lean follows the rotation of the shaft, it is
due either to a defective coupling or a
bent shaft. If the lean remains at the
same location, it would be due to
eccentricity or “out-of-squareness” of
the mating surfaces of the discharge
head and column. If either condition
exists, it must be investigated and
corrected prior to proceeding with the
installation.
Prior to energizing the motor for
rotation check, be sure the motor has
been properly lubricated as per the
manufacturer’s instructions.
If the motor is oil lubricated, the
drain plug should be removed and a
sample of the oil inspected for
condensation or foreign material. If any
contaminants or condensation is found in
the oil sample, the oil reservoir needs to
be flushed with clean oil until all
evidence of contamination is removed.
Replace the drain plug and fill the oil
reservoir in accordance with
manufacturer’s specifications for type
and quantity of oil.
Make temporary wiring connections
to the motor. The motor voltage rating is
given on the nameplate. DO NOT USE
ANY OTHER VOLTAGE.
The motor can now be checked for
proper rotation (counter-clockwise,
when viewed from above). When
checking direction of rotation, simply
“bump” the power; do not hold the
switch closed.
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