Gorman-Rupp Pumps S8B1-E100 460/3 1432260 and up - Manual (Page 41)

OM-06259 S SERIES PUMPS
PAGE E - 15 MAINTENANCE AND REPAIR
The motor housing (18) 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 E-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 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 (16, Figure E-2)
so that there is enough room for the terminal hous­
ing to clear.
Hoisting Bail
(Figure E-1)
If the hoisting bail (21) requires replacement, re­
move the hardware (22, 23 and 24) securing the
bail to the motor housing. Make sure the bushings
(20) 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
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
gaskets and shaft seal assemblies be used during
reassembly (see the parts lists for numbers).
Stator Installation
(Figure E-1)
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 gasket and O‐ring surfaces of the motor
housing (18), 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.