Gorman-Rupp Pumps 12B9-B 723228 and up - Manual (Page 32)

OM-00582 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
SEAL CLAMP
IMPELLER
SHAFT
STATIONARY
SEAT
ROTATING
ELEMENT
IMPELLER
SHIMS
IMPELLER
SPRING
SHAFT
SLEEVE
RETAINER
GASKETS
DISC
SEAL PLATE
SEALING
WEDGE
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 (35) on a flat surface with the
impeller side down. Assemble the stationary seat
and gaskets in the seal clamp (12) with the white
gasket toward the seal cavity side of the stationary
seat. Secure the seal cap and stationary seal com­
ponents to the seal plate with the nuts (32).
Slide the seal plate over the shaft until fully seated
against the pedestal (25). Be careful not to dam­
age the seal stationary seat on the shaft threads.
Align the pipe plug (11) with the pedestal opening
and temporarily secure the seal plate to the pedes­
tal using two capscrews and nuts (3/8‐16 UNC X 1
1/2 inch long, not supplied).
Slide the rotating portion of the seal onto the lubri­
cated shaft sleeve to the dimension (or scribed
line) noted during disassembly. Secure the station­
ary portion of the seal to the sleeve by tightening
the setscrews in the seal retainer.
Slide the sleeve and rotating portion of the seal
onto the shaft until the seal elements contact.
Impeller Installation and Adjustment
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (10) as previously removed, and screw the
impeller onto the shaft until tight.
A clearance of .020 to .040 inch (0,51 to 1,02 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.