Gorman-Rupp Pumps 04B3-B 806819 and up - Manual (Page 29)

OM-01214 0 SERIES
MAINTENANCE & REPAIR PAGE E - 9
This seal is not designed for operation at
temperatures above 160
_F (71_C). Do not
use at higher operating temperatures.
Lay the seal plate (8) on a flat surface with the im­
peller side facing up. If the wear ring (59) was re­
moved, press the replacement ring into the seal
plate until it seats squarely against the bore shoul­
der.
The wear ring must seat squarely in the
seal plate bore or binding and/or exces­
sive wear will result.
Subassemble the O‐ring onto the stationary ele­
ment and use even pressure to press this subas­
sembly into the seal plate until it seats squarely
against the shoulder bore
Carefully slide the assembled seal plate and sta­
tionary seal element over the shaft. Use caution not
to nick or damage the stationary seat. Secure the
seal plate to the pedestal with the machine screws
(11).
Subassemble the rotating element into the retainer
and bellows. Lubricate the I.D. of the bellows with
water and slide this subassembly over the shaft
sleeve until the seal face is just flush with the under­
cut end of the sleeve.
Slide the assembled shaft sleeve and rotating por­
tion of the seal and onto the shaft until the polished
faces contact. Continue to push the sleeve through
the seal until it is fully seated against the shaft
shoulder.
Install the seal spring.
Impeller Installation
Inspect the impeller and replace it if cracked or
badly worn.
For maximum pump efficiency, the impeller should
be centered within the volute scroll.
To verify the impeller positioning, measure the
pump casing and impeller as shown in Figure 4.
Use these measurements to calculate the required
impeller location (dimension E). Add or remove im­
peller adjusting shims (12) until dimension E is ob­
tained.
D
B
2
A B
2
C D
E
Step 2 Step 1 Step 3
A+
B
2
C+
D
2
E = -
Figure 4. Centering Impeller Within Volute Scroll
Install the correct thickness of impeller shims and
install the impeller key (58) in the shaft keyway.
Align the impeller keyway with the key and slide the
impeller onto the shaft until fully seated. Make sure the seal spring seats squarely over the shoulder on
the back side of the impeller.