OM-06111
S SERIES PUMPS
PAGE E - 15
MAINTENANCE AND REPAIR
rotor shaft. Remove the bearing cap (32) and gas
ket (33) from the rotor shaft.
NOTE
It may be necessary to use the bearing cap (32) and
capscrews (26) in conjunction with a bearing puller
to remove the lower bearing.
Stator Removal
(Figure E-1)
Do not remove the stator (5) 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.
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.
The motor housing (1) must be heated with a torch
to expand it enough for the stator to be removed.
Apply heat evenly to the outside of the motor hous
ing; excessive heat is not required. 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.
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 E-1)
It is recommended that the pressure relief valve
(42) 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
(45) to remove the pressure relief valve. If the nip
ple is removed, apply `Loctite Retaining Com
pound No. 680 or No. 620' or equivalent com
pound on both ends of the nipple
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 E-1)
If the hoisting bail (46) requires replacement, re
move the hardware (52, 53 and 54) securing the
bail to the motor housing. Make sure the bushings
(51) are in place when installing the hoisting bail.
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
