OM-06628
SFV & SFEV SERIES X‐PROOF PUMPS
PAGE E - 17
MAINTENANCE AND REPAIR
Use
Only Genuine Gorman-Rupp
re
placement parts. Failure to do so may cre
ate a hazard and damage the pump or di
minish optimal pump performance. Any
such hazard, damage or diminished per
formance is not covered by the warranty.
NOTE
When appropriate recycling facilities are available,
the user should recycle components and fluids
when doing any routine maintenance / repairs and
also at the end of the pump’s useful life. All other
components and fluids shall be disposed of ac
cording to all applicable codes and regulations.
PUMP END DISASSEMBLY
Preparing Pump for Disassembly
Use the hoisting bail to remove the pump from the
wet well or sump, and move it to a suitable location
for disassembly.
If the pump is designed for a guide rail application,
it is not necessary to remove the guide shoe for
most pump maintenance procedures. If removal of
the guide shoe is desired, disengage the hardware
securing the guide shoe to the pump casing and
remove the guide shoe and guide shoe seal.
If the pump is designed for a stand application, dis
engage the hardware securing the pump to the
stand before proceeding with pump maintenance.
Pump Casing Removal
Position the pump assembly on a flat surface and
use the lifting bail and lifting device to support the
pump in a vertical position. Remove the hardware
securing the motor assembly to the pump casing.
Using the lifting device, raise the motor assembly
out of the pump casing. It may be necessary to tap
around the circumference of the pump casing with
a soft‐faced mallet to break the seal between the
casing and motor. When the motor is free of the
pump casing, position the motor and remaining
pump end components horizontally on a flat sur
face for further disassembly. Chock the pump to
prevent rolling when positioned horizontally.
Remove the O‐ring from the outer shoulder of the
seal plate.
Draining Oil From Seal Cavity
The seal cavity oil must be drained to prevent the
oil from escaping as the impeller is removed.
Let the pump cool before removing the
seal cavity drain plug. Pressure built up
within a hot pump could cause the oil to
spray out when the plug is removed. Re
move the plug slowly and permit pressure
to vent to atmosphere.
Lay the pump on its side with one of the pipe plugs
facing up. Clean any dirt from around the plug. Re
move the plug slowly to release any pressure and
install a short pipe nipple in the hole. Roll the pump
and drain the seal oil into a
clean
container. In
spect the oil for water, dirt, or cloudy condition
which could indicate lower seal failure or poor O‐
ring seal.
Impeller Removal
Wedge a soft metal rod between the impeller vanes
to prevent impeller rotation.
NOTE
A strap wrench may also be used to immobilize the
impeller.
Remove the impeller nut or capscrew.
Remove the impeller washer. Remove the metal
rod or strap wrench used to immobilize the im
peller.
To remove the impeller, use two thin‐bladed screw
drivers positioned 180
_
apart to pry on the back of
the impeller and “walk” the impeller off the shaft.
Use increasingly larger screwdrivers (or wedges)
