16
10. Check the impeller thrust rings and bushing for wear. See Figures 27 & 28.
11. Remove the barrier (item 9) from the clamp ring (item 11). Pry the barrier out
with your hand. See figure 29.
12. Check the impeller shaft for signs of cracking, chipping, scoring or wear. The
shaft is molded into the barrier and cannot be removed.
13. Inspect the inside and outside of the barrier for signs of rubbing.
14. Remove the o-ring (item 8) from the barrier and inspect for chemical attack,
swelling, brittleness, cuts, etc.
15. Visually inspect the outer drive (item 15) for rubbing, damage, corrosion or
loose magnets.
Thrust Ring Replacement
1. Thrust ring (item 2A) is held in-place with a snap fit with a ridge. Using a razor knife or side cutters, cut a notch out of the thrust ring.
Pull ring up and out of the holder. See figures 30-31.
2. If thrust ring is made of SiC, ring cannot be replaced & new impeller assembly (item 2) must be ordered.
3. To reinstall, align the two flats on the thrust ring with the flats in the bore of the impeller. Using a piece of wood, press into place
using an arbor press until the thrust ring is completely seated in the impeller.
Figure 27 - Impeller
Thrust Ring (2A)
Figure 28 - 1st stage
impeller bushing (item 2B)
Figure 29
Figure 30
Figure 31
