Gorman-Rupp Pumps SE2C3 115V 1P 1483930 and up - Manual (Page 32)

OM−06492 SE SERIES
MAINTENANCE & REPAIR PAGE E − 10
vent the rotor from falling on the stator windings. If
necessary, tap the impeller end of the rotor shaft
with a block of wood or soft-faced mallet to loosen
the seal between the bearing and the motor hous-
ing bore.
Bearing Removal
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and rotor
assembly is removed.
Before removing the bearings from the rotor shaft,
clean and inspect the bearings in place as follows.
Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area; free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
Rotate the bearings by hand to check for rough-
ness or binding. If rotation is rough, replace the
bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the mounting
plate (17) and motor housing (10). Replace the
shaft and rotor (as an assembly), motor housing or
mounting plate if the proper bearing fit is not
achieved.
If replacement is required, use a bearing puller to
remove the bearings from the rotor shaft.
Centrifugal Switch Actuator Removal
Remove the snap ring securing the switch actuator
to the shaft. Use a felt tip ink marker to scribe the
location of the actuator on the shaft. Use a suitable
puller to remove the actuator from the shaft.
Stator Removal
Do not remove the stator (55) unless it is defective
(open windings, insulation resistance low, or stator
core damaged).
To remove the stator, position an expandable tool,
such as a split disc, approximately 2 inches (51
mm) inside the stator, and expand it tightly and
squarely on the I.D. Attach a lifting device to the lift-
ing eye of the tool, and raise the assembly approxi-
mately 1 inch (25 mm) off the work surface. Take
care not to damage the stator end turns.
The motor housing (10) must be heated with a
torch to expand it enough for the stator to be re-
moved. Apply heat evenly to the outside of the mo-
tor housing; excessive heat is not required. When
the motor housing is sufficiently heated, use a soft-
faced mallet to rap alternate edges of the motor
housing, and walk" the stator out. Continue this
process until the stator clears the motor housing.
Use caution not to damage the stator end
turns during removal from the motor hous-
ing.
After the stator has been removed, wrap it in clean,
dry rags or other suitable material until reassembly.
The stator must be kept clean and dry. When han-
dling the stator, do not set it on the end windings;
lay it on its side.
Do not attempt to rewind the stator. Wind-
ing tolerances and materials are closely
controlled by the manufacturer, and any
deviation can cause damage or operating
problems. Replace the stator, or return it to