S SERIES
OM--05096
MAINTENANCE & REPAIR
PAGE E -- 9
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.
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 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 3.
ROTOR
SHAFT
IMPELLER
OIL SEAL
ROTATING
ELEMENT
PUMP HOUSING/
OIL CHAMBER
OIL CHAMBER
COVER
UPPER STATIONARY
SEAT
SPRING
BELLOWS
UPPER
SEAL
RETAINER
LOWER
STATIONARY
SEAT
LOWER
STATIONARY
ELEMENT
LOWER
SEAL
BELLOWS
SPRING
RETAINER
ROTATING
ELEMENT
UPPER
STATIONARY
ELEMENT
Figure 3. Seal Assemblies
Seal Installation
(Figures 1, 2 and 3)
NOTE
The seal for this pump consists of two identical seal
assemblies installed back-to-back in tandem. The
two seals are provided for repair under one part
number for the mechanical seal kit.
Do not unwrap the new seal(s) until time of installa-
tion. Cleanliness of seal components is critical, es-
pecially the seal faces.
Clean the rotor shaft and seal cavity area. Be sure
the area is dry and free of lint and dirt. Check the
seal bore for burrs or nicks that might prevent a
good seal. Apply a
light
coating of oil to the bore.
Carefully remove the material stuffed into the seat
bore (or unwrap the shaft).
Be sure
no debris
stopped by the material falls into the motor cavity.
NOTE
When pressing seal components onto the shaft,
use hand pressure only.
Ensure that the upper stationary element is subas-
sembled into the stationary cup seat. Position this
subassembly in the oil chamber bore with the seal-
ing face up, and cover the seal face with a clean,
