Gorman-Rupp Pumps U4B65S-B 1298951 and up - Manual (Page 35)

OM-05667 SUPER U SERIES
MAINTENANCE & REPAIR PAGE E - 11
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.
Inspect the seal component 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.
If a replacement seal is being used, remove it from
the container and inspect the precision finished
faces to ensure that they are free of any foreign
matter.
To ease installation of the seal, lubricate the O‐
rings and shaft with water or a very small amount
of oil, and apply a drop of light lubricating oil on the
finished faces. Assembly the seal as follows, (see
Figure 5).
SEAL PLATE
O‐RINGS
IMPELLER
SHAFT
STATIONARY
SEAT
STATIONARY
ELEMENT
ROTATING
ELEMENT
DRIVE BAND
BELLOWS
IMPELLER
SHIMS
IMPELLER
SPRING
SPRING
CENTERING
WASHER
SEAL
WASHER
Figure 5. 46512-074 Seal Assembly
This seal is not designed for operation at
temperatures above 160
_
F (71
_
C). Do not
use at higher operating temperatures.
Lubricate the stationary seat O‐rings with water or
light oil, and install them in the stationary seat.
Install the stationary seal element in the stationary
seat. Press this stationary subassembly into the
front of the seal plate until it seats squarely against
the bore shoulder.
Install the seal plate gasket (4). Position the seal
plate (3) over the shaft and secure it to the bearing
housing with the hardware (25 and 26). Be careful
not to damage the stationary element on the shaft
threads.
NOTE
It is recommended that a tapered sleeve be
installed over the threads of the impeller shaft to
ease installation of rotating seal components.
Lubricate the shaft with a small amount of light oil
and slide the rotating subassembly (consisting of
the rotating element, bellows and retainer) onto the
shaft. Apply firm, steady pressure on the seal re­