OM-07264
S SERIES PUMPS
PAGE E - 9
MAINTENANCE AND REPAIR
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 (33) for damaged threads,
scoring, 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 rotor
and shaft must be replaced as an assembly (see
MOTOR DISASSEMBLY
).
The shaft seal assembly should not be reused be
cause wear patterns on the finished faces cannot
be realigned during reassembly. This could result
in premature failure. If necessary to reuse an old
seal in an
emergency
,
carefully
wash all metallic
parts in fresh cleaning solvent and allow to dry thor
oughly.
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 seal as illustrated in Figure 3.
O‐RING
O‐RING
STATIONARY
ELEMENT
RETAINER
SHAFT
SLEEVE
SPRING
SEAL
SEAT
DIFFUSER
IMPELLER
SHIMS
ROTATING
ELEMENT
BELLOWS
ASSEMBLY
ROTOR
SHAFT
ROTATING
ELEMENT
STATIONARY
ELEMENT
O‐RING
Figure 3. Seal Assembly