Gorman-Rupp Pumps SE1 1/2B3-E.33 12V 1483930 and up - Manual (Page 19)

SE SERIES OM−06490
MAINTENANCE & REPAIR PAGE E − 5
Impeller Removal
Wedge a piece of wood between the vanes of the
impeller (8) and the inside of the pump casing (5).
Insert a large flat-bladed screwdriver into the slot in
the end of the shaft. Turn the shaft in a clockwise
direction to break the impeller loose. After the im-
peller breaks loose, remove the screwdriver and
wood block and unscrew the impeller from the
shaft. Use caution when unscrewing the impeller;
tension on the seal spring will be released.
Remove the impeller shims (7). For ease of reas-
sembly, tie and tag the shims or measure and re-
cord their thickness.
Seal Removal
(Figures 1 and 2)
Remove the spring centering washer and spring.
Lubricate the seal area of the rotor shaft with light
oil. To easily remove the seal, disengage the hard-
ware (3 and 4) securing the pump casing to the
motor (15). Use a soft-faced mallet to tap the pump
casing loose from the casing tube (1A).
Slide the pump casing and seal off the shaft. Press
the stationary portion of the seal out of the pump
casing from the back side.
Inspect the lower casing tube O-ring (2). If replace-
ment is required, remove it from the pump casing.
If no further disassembly is required, proceed with
PUMP END REASSEMBLY.
NOTE
Do not disassemble the motor unless it is neces-
sary and a clean, well-equipped shop is available. If
the motor housing components are to be serviced,
see
MOTOR DISASSEMBLY in this section. Do not
reassemble the end components at this time.
PUMP END REASSEMBLY
NOTE
Reuse of old O-rings, gaskets, or shaft seal parts
may result in premature leakage or reduced pump
performance. It is strongly recommended that new
gaskets and a new shaft seal assembly be used
during reassembly (see the parts lists for numbers).
Cleaning And Inspection Of Pump Parts
Carefully inspect any O-rings or gaskets before re-
moval and cleaning to determine if a proper seal
and compression existed prior to disassembly. If
sealing was faulty or questionable, the cause must
be determined and corrected before reassembly.
Replace any parts as required.
Thoroughly clean all reuseable parts with a soft
cloth soaked in cleaning solvent. Remove all O-
rings and gaskets, and clean the sealing surfaces
of dirt or gasket material. Be careful not to scratch
gasket surfaces.
Most cleaning solvents are toxic and
flammable. Use them only in a well-ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
Inspect the rotor shaft for damaged threads, scor-
ing, or nicks. Remove nicks and burrs with a fine
file or emery cloth to restore original contours. If the
shaft is bent or severely damaged, the motor must
be replaced as an assembly (see MOTOR DISAS-
SEMBLY).
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak-
age. The shaft seal assembly should not be reused
because wear patterns on the finished faces can-
not be realigned during reassembly. This could re-
sult in premature failure. If any components are
worn, replace the complete seal; never mix old
and new seal parts.
Handle a new seal with extreme care to prevent
damage. Be careful not to contaminate the preci-
sion finished faces; even fingerprints on the faces
can shorten seal life. If necessary, clean the faces
with a non-oil based solvent and a clean, lint-free
tissue. Wipe lightly in a concentric pattern to avoid
scratching the faces.
Install the shaft seal as illustrated in Figure 2.