Gorman-Rupp Pumps SE1 1/2A3A 115V 1P 1483930 and up - Manual (Page 33)

OM−06489 SE SERIES
MAINTENANCE & REPAIR PAGE E − 12
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 (63 and 71) 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.
Rotor And Shaft Installation
With the stator installed and the motor housing up-
right, carefully ease the rotor/shaft (66) and as-
sembled bearings through the stator so that the
lower bearing (71) seats squarely in the bore of the
motor housing (10).
Wrap the impeller end of the shaft in a clean cloth to
protect it during installation of the head and power
cable.
Head And Power Cable Installation
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Make certain that the plug
on the pump power cable is discon-
nected from its receptacle.
Clean the exterior of the power cable with warm
water and mild detergent. Check for obvious physi-
cal damage. Check the cable for continuity and in-
sulation resistance (see Electrical Testing in
TROUBLESHOOTING). Do not attempt repairs
except to cut off either end of the cable; splicing is
not recommended. Reinstall any wire tags or ter-
minals which may have been removed.