Gorman-Rupp Pumps 13E52-GX390 1368838 and up - Manual (Page 26)

10 SERIES OM−04734
MAINTENANCE & REPAIR PAGE E − 8
age. Clean and polish the shaft sleeve, or replace it
if there are nicks or cuts on either end. If any com-
ponents are worn, replace the complete 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, sleeve and bellows with water or a very small
amount of oil, and apply a drop of light lubricating
oil on the finished faces. Assemble the seal as fol-
lows (see Figure 3).
IMPELLER SHAFT
IMPELLER
SHIMS
O-RING
IMPELLER
SPRING
CENTERING
WASHER
SPRING RETAINER
SHAFT
SLEEVE
STATIONARY
SEAT
BELLOWS
ROTATING
ELEMENT
INTERMEDIATE
Figure 3. 25285−855 Seal Assembly
This seal is not designed for operation at
temperatures above 160
_F (71_C). Do not
use at higher operating temperatures.
Inspect the engine stub shaft for damage. Small
scratches or nicks may be removed with a fine file
or emery cloth. If the stub shaft is bent or exces-
sively worn, replace the shaft (see the engine ser-
vice manual).
Position the intermediate against the engine bell-
housing and secure it with nuts (11).
Assemble the O-ring into the seal stationary seat.
Postion the stationary seat in the intermediate bore
with the sealing face toward the impeller end of the
shaft. Press the stationary element and O-ring into
the intermediate until fully seated. A push tube cut
from a length of plastic pipe would aid this installa-
tion. The I.D. of the tube should be approximately
the same as the I.D. of the seal spring.
Subassemble the rotating element into the retainer
and bellows. Apply a drop of light oil on the preci-
sion finished faces; never use grease. Use even
pressure to carefully press this subassembly onto
the sleeve (37) until the rotating element is just
flush with the chamfered end of the sleeve.
Slide the sleeve and assembled rotating portion of
the seal onto the shaft until the seal faces contact.