Gorman-Rupp Pumps 83B52-GX390 1324570 and up - Manual (Page 26)

80 SERIES OM−04738
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 the hardware 12, 14 and
15).
Assemble the O-ring into the stationary seat and lu-
bricate the O-ring with light oil. Press the stationary
seat into the intermediate bore until fully seated. A
push tube cut from a length of plastic pipe would
aid this installation. 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 shaft sleeve (41) 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.
Continue to push the sleeve through the seal until it
seats squarely against the shaft shoulder.