OM-06511
SF SERIES
PAGE E - 9
MAINTENANCE AND REPAIR
housing until the female terminal (15) can be ac
cessed. Pull the female terminal off the male termi
nal (16) 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 REASSEM
BLY
.
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
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
damaged, the rotor and shaft must be replaced as
an assembly (see
MOTOR DISASSEMBLY
).
Neither of the shaft seal assemblies should be
reused because wear patterns on the finished
faces cannot be realigned during reassembly. This
could result in premature failure. If necessary to re
use an old seal in an
emergency
,
carefully
wash
all metallic parts in fresh cleaning solvent and allow
to dry thoroughly.
Handle the seal parts 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 circular pattern to avoid
scratching the faces.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak
age. If any components are worn, replace the com
plete seal;
never mix old and new seal parts.
Install the shaft seals as illustrated in Figure E-3.
