Gorman-Rupp Pumps SE2C3A 115V 1P 1483930 and up - Manual (Page 29)

OM−06493 SE SERIES
MAINTENANCE & REPAIR PAGE E − 8
spring cannot be compressed and held in place
until the pump casing is installed.
Unpack the lower stationary seat and element.
Place a clean tissue over the sealing face of the sta-
tionary element and subassemble the stationary
element into the stationary seat.
Apply a light coating of oil to the seal seat bore in
the pump casing (2). Position the stationary subas-
sembly in the pump casing bore with the sealing
face up and cover the seal face with a clean tissue.
Use your thumbs to press the assembly into the
bore. Apply equal pressure on opposite sides until
the seat contacts the bore shoulder. Remove the
tissue and inspect the seal face to ensure that it is
clean and dry. If cleaning is necessary, use clean
tissue to wipe lightly in a concentric pattern. After
cleaning, apply a drop light oil to the seal face.
Inspect the face of the lower rotating element to
make certain that it is clean. If cleaning is neces-
sary, use a clean tissue to wipe lightly in a circular
pattern. After cleaning, apply a drop of light oil to
the seal face.
Carefully position the assembled pump casing,
stationary seat and element over the shaft until the
sealing faces contact. Secure the pump casing to
the motor housing by tightening the hardware (94
and 95) in an alternating pattern.
Position the shaft sleeve (76) on the shaft with the
chamfer on the O.D. toward the impeller end of the
pump, and slide the sleeve onto the shaft until fully
seated.
Postion the dust seal (71) in the pump casing bore
as shown in Figure E-1 and press it into the pump
casing until fully seated.
Impeller Installation
Inspect the impeller (2) for cracks, broken vanes,
or wear from erosion, and replace it if damaged.
Clean the threads on the rotor shaft to remove any
old thread locking material.
Install the impeller key (76) in the shaft keyway,
align the impeller keyway, and press the impeller
onto the shaft until it seats firmly against the shaft
sleeve.
Install the impeller hardware (88, 89 and 90).
Wedge a block of wood between the vanes of the
impeller to prevent shaft rotation, and tighten the
impeller lock nut (90).
Remove the block of wood, and turn the impeller to
check for free rotation. Check the front clearance
after installing the impeller cover (87).
Install the impeller cover gasket (84). Position the
impeller cover (87) over the pump casing (1) and
secure the cover with the hardware (85 and 86).
Impeller Clearance
For best performance, there should be a clearance
of .010 to .020 inch (0,25 to 0,51 mm) between the
impeller cover and the face of the impeller. Use a
feeler gauge to measure this clearance.
If the impeller scrapes against the back of the im-
peller cover when the impeller is turned by hand,
remove the impeller cover and add another impel-
ler cover gasket (84). Reinstall the impeller cover,
and recheck clearance.
Strainer Installation
Inspect the strainer (91) for cracks, distortion or
erosion, and replace it if defective.
Position the strainer squarely on the shoulder of
the impeller cover (87) and secure with the hard-
ware (92 and 93). Make certain that the strainer
seats properly against the shoulder of the impeller
cover.
See VACUUM/PRESSURE TESTING and LU-
BRICATION before putting the pump back into
service.
MOTOR DISASSEMBLY
Disassembly of the motor is rarely required except
to replace the rotor, stator, bearings or motor hous-
ing. Do not disassemble the motor unless it is nec-
essary and a clean, well-equipped shop is avail-
able.
NOTE
It is recommended that a pump with a defective mo-
tor be returned to Gorman-Rupp, or to one of the
Gorman-Rupp authorized Submersible Repair