OM-06511
SF SERIES
PAGE E - 7
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.
Carefully inspect any O‐rings before removal and
cleaning to determine if a proper seal and com
pression existed prior to disassembly. If sealing
was faulty or questionable, the cause must be de
termined and corrected before reassembly. All O‐
rings
must
be replaced if disturbed.
PUMP END DISASSEMBLY
Preparing Pump for Disassembly
Use the hoisting bail to remove the pump from the
wet well or sump. If installed in a trash application,
remove the discharge piping and move the pump
to a suitable location for disassembly.
If installed in a slide rail application, it is not neces
sary 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 installed in a trash application, it is not necessary
to remove the optional discharge elbow for most
pump maintenance procedures. If removal of the
discharge elbow is desired, disengage the hard
ware securing the elbow to the pump casing and
remove the elbow and gasket.
If the pump is equipped with a trash stand, disen
gage the hardware securing the pump to the stand
before proceeding with pump disassembly.
Suction Head and Wear Ring Removal
(Figure E-1)
Position the pump horizontally on a flat work sur
face and remove the hardware (9 and 10) securing
the suction head (8) to the pump casing (1).
Use a pair of suitable tools to pry the suction head
and assembled wear ring (6) out of the pump cas
ing.
Inspect the wear ring for excessive wear or scoring.
If replacement is required, install two M12 x 1.75 x
76 mm long capscrews (not supplied) in the
tapped holes in the suction head. Turn the screws
evenly in an alternating sequence to press the
wear ring out of the suction head.
Pump Casing Removal
(Figure E-1)
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
(10 and 13) securing the motor assembly (12) to
the pump casing (1).
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 (25) from the outer shoulder of
the seal plate (24).
Draining Oil From Seal Cavity
(
Figure E-2)
The seal cavity oil must be drained to prevent the
oil from escaping as the impeller is removed.
