Waukesha Cherry-Burrell Maintenance
10/2010 95-03009 Page 35
Backplate/Impeller Assembly
1. Place the impeller on a clean flat surface, shaft-end up, and slide the
assembled backplate onto the impeller shaft.
NOTE: Avoid hitting
the stationary seal against the impeller shaft, as it
could break the seal.
2. Carefully place the rotary seal in position
over the impeller shaft and
down against the stationary seal.
3. Lubricate and slide the seal o-ring onto the impeller shaft. Use the
spri
ng retainer as a tool to push the o-ring into the rotary seal (Figure
30).
4. Slide the tabbed washer (Figure 29, item F) over the impeller shaft
and engage the tabs of the washer into no
tches on the outside of the
rotary seal (Figure 31, items F and H).
5. Install the three seal springs into the holes in the spring retainer (Fig-
ure 31, items C and E). Hold the springs in place with R
TV silicone
sealant.
6. Slide the spring retainer over the impeller shaft until the slots in the
spri
ng retainer engage the drive tabs on the washer and the springs
rest against the washer (Figure 31).
7. With the backplate against the impeller, push the spring retainer
down to
compress the springs until the length of visible spring is
approximately 1/8".
8. Lock the spring retainer in place by tightening the set screws (Figure
31, item D).
9. Install the deflector onto the impeller shaft (Figure 31, item B).
10. If your system has a water cascade, thread the water cascade hose
through the adapter and install the cascade block on the backplate
(Figure 32, items A and B).
11. Slide the motor shims onto the shaft. Use the same number of shims
that
were removed when the pump was disassembled.
12. Install the impeller assembly on the stub shaft of the motor.
13. Hand-tighten the impeller retainer bolt on the shaft.
Figure 30 - Installing O-ring Using Spring
Retainer
Figure 31 - Type 1 Seal Assembly
Figure 32 - Installing Water Cascade
System
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