S SERIES PUMPS
OM-07264
MAINTENANCE AND REPAIR
PAGE E - 14
Stator Removal
(Figure 1)
Do not remove the stator (32) unless it is defective
(open windings, insulation resistance low, or stator
core damaged). If the stator must be removed, re
move the terminal housing as indicated in
Termi
nal Housing And Power Cable Disassembly.
Remove the pipe plug (12) located in the motor
housing, and loosen the allen head setscrew (13)
located underneath the pipe plug.
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. At
tach a lifting device to the lifting eye of the tool, and
raise the assembly approximately 1 inch (25 mm)
off the work surface. Take care not to damage the
stator end turns.
The motor housing (11) 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. Use a
soft‐faced mallet to rap alternate edges of the mo
tor 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.
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
one of The Gorman‐Rupp Authorized Sub
mersible Repair Centers or The Gorman‐
Rupp factory, if defective.
Relief Valve
(Figure 1)
It is recommended that the relief valve assembly
(29) be replaced at each overhaul, or at any time
the pump motor overheats and activates the valve.
Never replace this valve with a substitute which has
not been specified or provided by the Gorman‐
Rupp Company.
It is not necessary to remove the heavy pipe nipple
(30) to remove the relief valve assembly. If the pipe
nipple is removed, apply `Loctite Retaining Com
pound No. 620 or 680' or equivalent compound to
the pipe nipple threads in the motor housing
only
.
When installing the relief valve, use `Loctite Pipe
Sealant With Teflon No. 592' or equivalent com
pound on the threads. Position the valve out of the
way, next to the terminal housing (1, Figure 2) so
there is enough room for the terminal housing to
clear.
Hoisting Bail
(Figure 1)
If the hoisting bail (23) requires replacement,re
move the hardware (25, 26 and 27) securing the
bail to the motor housing (11). Remove the bush
ings (24).
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
