OM-07089
S SERIES PUMPS
PAGE E - 19
MAINTENANCE AND REPAIR
motor housing, and “walk” the stator out. Continue
this process until the stator clears the motor hous
ing.
Take care 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.
Remove the stator key (73). The stator
must
be
kept clean and dry. When handling 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
one of The Gorman‐Rupp Authorized Sub
mersible Repair Centers or The Gorman‐
Rupp factory, if defective.
MOTOR REASSEMBLY
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
one of The Gorman‐Rupp Authorized Sub
mersible Repair Centers or The Gorman‐
Rupp factory, if defective.
NOTE
Reuse of old O‐rings, gaskets, shaft seal parts will
result in premature leakage or reduce pump per
formance. It is strongly recommended that new O‐
rings and shaft seal assemblies be used during
reassembly (see the parts lists for numbers).
Stator Installation
(Figure E-2)
NOTE
Stator installation involves heating the motor hous
ing. This process must be done quickly. Therefore it
is recommended that these steps be performed by
two people to promote efficient installation of the
stator.
Clean all O‐ring surfaces, completely removing
any old gasket and cement material. Inspect the
sealing surfaces for burrs, nicks and pits which
could cause a poor seal, and replace defective
parts as required.
Thoroughly clean the inside of the motor housing
(70) with fresh solvent. The interior
must
be dry
and free of dirt or lint.
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.
After the motor housing is thoroughly cleaned, po
sition it on a flat surface with the discharge end
down. Do not unwrap the stator (53) until the motor
housing has been prepared for stator installation.
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 and block it from rolling.
Test the new stator as indicated in
Electrical Test
ing
in
TROUBLESHOOTING
, Section B, to ensure
that no damage has occurred during transit or han
dling.
NOTE
Remove any drops of varnish from the ends of the
stator before installation to ensure proper stack‐up
height when assembled.
Position an expandable tool, such as a split disc,
approximately 2 inches (51 mm) down inside the
stator (opposite the lead wire end), and expand it
