Gorman-Rupp Pumps SE2D3A 115V 1P 1483930 and up - Manual (Page 33)

OM-06495 SE SERIES
MAINTENANCE & REPAIR PAGE E - 12
stator to slide into the motor housing before the
housing cools.
Heat the motor housing with a torch to expand it
enough for the stator to be installed; when heating
the motor housing, make sure that the stator is
clear to avoid a fire hazard or damage to the wind­
ings. Apply heat evenly to the outside of the hous­
ing; excessive heat is not required.
When the motor housing is sufficiently heated, po­
sition the stator so that the leads are in line with the
terminal opening. Carefully lower the stator into the
motor housing until fully seated against the hous­
ing shoulder. Be careful not to damage the stator
lead insulation during reassembly. If the stator
“cocks” in the motor housing, remove it and try
again.
After the stator is fully and squarely seated on the
motor housing shoulder, remove the expandable
disc tool. Untape or remove the protective sleeve
from the stator leads.
Cover the motor housing with a clean, lint‐free
cloth while the rotor is being assembled.
Centrifugal Switch Actuator Installation
Press the centrifugal switch actuator (21) on the ro­
tor shaft so that the actuator flange sits just flush
with the snap ring groove. The lower side should
align with the scribed mark on the shaft. Secure the
switch with the snap ring.
Bearing Installation
Inspect the rotor shaft for damaged threads, scor­
ing in the seal area, and a nicked or damaged
keyway. If the bearings were removed, inspect the
bearing areas for scoring or galling. Remove nicks
and burrs with a fine file or emery cloth. Inspect the
rotor area for separated laminations. If the shaft is
bent or damaged, or if the laminations are sepa­
rated, replace the shaft and rotor (a single assem­
bly).
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.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear­
ings should never be heated with a direct flame or
directly on a hot plate.
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor­
oughly filtered.
Heat the bearings (18 and 22) to a uniform tem­
perature no higher than 250
_
F (120
_
C). Slide the
bearings onto the shaft, one at a time, until they are
fully seated against the shaft shoulders. This
should be done quickly, in one continuous motion,
to prevent the bearings from cooling and sticking
on the shaft.
Use caution when handling hot bearings to
prevent burns.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
out of position in shrinking. If movement has oc­
curred, use a suitably sized sleeve and a press to
reposition the bearings. Make certain that they are
seated squarely against the shaft shoulders.
If heating the bearings is not practical, use a suit­
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings on the shaft.
When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.