Gorman-Rupp Pumps SFDV4B 1520149 and up User Manual
Page 32
SF SERIES
OM-06407
MAINTENANCE AND REPAIR
PAGE E - 8
Apply oil to the sleeve and work it up under the rub
ber bellows. Slide the rotating portion of the seal off
the shaft sleeve.
Work a pair of stiff wires with hooked ends between
the rotor shaft and the stationary seat and pull the
stationary seat and O‐ring out of the seal plate (15).
NOTE
An alternate method of removing the stationary ele
ment is to remove the screws (17) securing the seal
plate (15) to the motor assembly (7). Pry the as
sembled seal plate and stationary element off the
shoulder of the intermediate (8, 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.
Remove the seal sleeve O‐ring (18) from the rotor
shaft.
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)
With the pump end and lower seal removed, se
cure the pump in an inverted position for further
disassembly.
Remove the seal plate (15, 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 and seal
spring.
Lubricate the seal area of the rotor shaft (3) and
work oil up under the bellows. Remove the hard
ware (11 and 12) securing the intermediate (8) to
the motor subassembly (1).
Carefully pull the assembled intermediate, rotor
shaft (3) and bearings (2 and 5) out of the motor
housing until the female terminal (14) can be ac
cessed. Pull the female terminal off the male termi
nal (15) and remove the intermediate, rotor shaft
and bearings from the motor assembly. Remove
the O‐ring (6) from the intermediate shoulder.
Remove the snap ring (4) from the groove in the in
termediate and pull the assembled rotor shaft and
bearings out of the intermediate. Cover the motor
assembly with a clean rag to prevent foreign mate
rial from entering the motor cavity.
With the rotor shaft and bearings removed, press
the stationary seal element and O‐ring out of the in
termediate from the back side.
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)
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