Gorman-Rupp Pumps 11 1/2A3-B 348418 and up - Manual (Page 32)

OM-00565 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
SEAL PLATE
IMPELLER
SHAFT
STATIONARY
SEAT
ROTATING
ELEMENT
IMPELLER
SHIMS
IMPELLER
SPRING
SHAFT
SLEEVE
SPRING CENTERING
WASHER
BELLOWS
STATIONARY
ELEMENT
STATIONARY
SEAT
RETAINER
Figure 3. Seal Assembly
This seal is not designed for operation at
temperatures above 160
_
F (71
_
C). Do not
use at higher operating temperatures.
Position the seal plate (36) on a flat surface with the
impeller side down. Press the stationary subas­
sembly (consisting of the stationary seat and sta­
tionary element) into the seal plate until the station­
ary seat bottoms against the seal plate bore.
Slide the seal plate over the shaft until fully seated
against the pedestal (25). Be careful not to dam­
age the stationary element on the shaft threads.
Temporarily secure the seal p late using two caps­
crews and nuts (3/8‐16 UNC X 1-1/2 inch long, not
supplied).
Slide the rotating subassembly (consisting of the
rotating element retainer and bellows) onto the lu­
bricated shaft sleeve until the rotating element is
just flush with the chamfered end of the sleeve.
Slide the sleeve and rotating subassembly onto
the shaft until the seal elements contact. Continue
to push the sleeve through the seal until it bottoms
against the shaft shoulder.
Install the seal spring and spring centering washer
(21).
Impeller Installation And Adjustment
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (22) as previously removed, and screw the
impeller onto the shaft until tight.
A clearance of .010 to .012 inch (0,25 to 0,30 mm)
between the impeller and the seal plate is neces­
sary for maximum pump efficiency. Measure this
clearance and add or remove impeller shims until
this clearance is reached.
NOTE
Be sure the seal plate is tight against the pedestal
while measuring this clearance.