Gorman-Rupp Pumps SFV3A 1473393 and up - Manual (Page 35)

SF SERIES OM-06396
MAINTENANCE AND REPAIR PAGE E - 8
work oil under the bellows assembly. Pull the rotat­
ing portion of the seal off the shaft.
Work a pair of stiff wires with hooked ends between
the rotor shaft and the stationary element and pull
the stationary element and seat out of the seal
plate (14).
NOTE
An alternate method of removing the stationary ele­
ment is to remove the screws (16) securing the seal
plate (14) to the motor assembly (7). Pry the as­
sembled seal plate and stationary element off the
shoulder of the intermediate (7, Figure E-2). Re­
move the O‐ring (6) and press the stationary ele­
ment and seat out of the seal plate from the back
side.
If no further disassembly is required, proceed to
the appropriate areas in PUMP END REASSEMB­
LY.
Upper Seal Removal
(Figures E-2 and E-3)
Unless cracked or otherwise worn, it is not neces­
sary to remove the intermediate (7) for access to
the upper seal assembly (8).
Remove the seal plate (14, Figure E-1) as de­
scribed above in Lower Seal Removal.
Remove the seal retaining ring (10) using snap ring
pliers. Use caution when removing the retaining
ring; tension on the seal spring will be released.
Remove the spring centering washer (9) and seal
spring.
Lubricate the seal area of the rotor shaft (3) and
work oil up under the bellows. Use the hooked
ends of two stiff wires to hook the retainer and pull
the rotating portion of the seal off the shaft.
Slide the hooked ends of two stiff wires along the
shaft and under the stationary seal seat. Hook the
back side of the seat and pull it from the intermedi­
ate bore.
If no further disassembly is required, proceed to
the appropriate areas in PUMP END REASSEMB­
LY.
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 pump end components at this time.
PUMP END REASSEMBLY
NOTE
Reuse of old O‐rings or shaft seal parts will result in
premature leakage or reduced pump performance.
It is strongly recommended that new O‐rings and
shaft seal assemblies be used during reassembly
(see the parts lists for numbers).
Cleaning and Inspection of Pump Parts
(Figures E-1 and E-2)
With the pump inverted, stuff a clean tissue into the
stationary seal seat bore of the intermediate (8, Fig­
ure E-2) or wrap a small rag around the shaft to
prevent foreign material from entering the motor
cavity.
Carefully inspect any O‐rings before removal and
cleaning to determine if a proper seal existed prior
to disassembly. If sealing was faulty or question­
able, 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 clean the sealing 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 (3, Figure E-2) for dam­
aged threads, scoring, or nicks. Remove nicks and
burrs with a fine file or hand honing stone to restore
original contours. If the shaft is bent or severely