Gorman-Rupp Pumps 81 1/2E9-B 334698 and up - Manual (Page 29)

80 SERIES OM−00772
MAINTENANCE & REPAIR PAGE E − 8
SEAL CAP
IMPELLER
SHAFT
STATIONARY
SEAT
SEALING
WASHERS
IMPELLER
SHIMS
IMPELLER
SEAL
SPRING
SPACER
WASHER
ROTATING
ELEMENT
SEAL PLATE
SEAL
RETAINER
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.
Install the sealing washers and stationary seal seat
in the intermediate the seal cap as shown in Figure
3. Secure the seal cap to the intermediate with the
hardware (12 and 13).
Carefully slide the assembled intermediate and
stationary portion of the seal over the shaft (20) un-
til the intermediate seats against the bearing hous-
ing (23). Use caution not to damage the stationary
seat on the shaft threads. Secure the intermediate
to the bearing housing with the hardware (9, 10
and 11).
Slide the rotating portion of the seal onto the shaft
until the seal faces contact and install the seal
washer (19).
Impeller Installation
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (18) as previously removed. Apply ‘Loctite
Retaining Compound No. 242’ or equivalent com-
pound on the shaft threads and screw the impeller
onto the shaft until tight.
A clearance of .008 to .015 inch ( 0,20 to 0,38mm)
between the impeller and the vane plate (27) is
necessary for maximum pump efficiency. Position
the vane plate over the impeller, and use a feeler
gauge to measure this clearance. Add or remove
impeller shims until the proper clearance is
achieved.
After the impeller clearance is set, secure the im-
peller to the shaft with the impeller nut (32).
Vane Plate and Pump Casing Installation
Before installing the vane plate, clean all of the old
adhesive from the mating surfaces of the vane
plate and the intermediate. These surfaces must
be completely clean before installation.