Pentair Pool Products Delta D2CX20-21 Installation & Service Manual With Parts List page 9

Fig. 14
Fig. 15
Fig. 16
23833A596
REPLACING LOWER SEAL
1. Use steps 1 through 5 for removing grinder
ring and grinder impeller.
2. Before removing any other parts use a mark-
ing pen to mark joining parts so that they can
be replaced in same position as removed.
See Figure 12.
3. Remove oil fill plug slowly from seal chamber
as pressure may have built up in this cavity,
and pour out oil. See Figures 13 & 14.
4. Remove volute case bolts and pull off volute
casing. Plastic hammer can be used to bump
on casing discharge to loosen. Place gasket
in oil to prevent drying out.
5. Insert large flat blade screwdriver in slot
provided in pump shaft and hold impeller hub
with vise grip pliers. Turn impeller counter-
clockwise to loosen. It may be necessary to
give pliers a sharp blow with plastic hammer to
loosen impeller. See Figure 15. Turn counter-
clockwise to loosen.
6. Use wire brush and putty knife and clean
casting before removing seal.
7. Remove Allen socket head screws from seal
plate. See Figure 16.
8. Pry carbon portion of seal from shaft by using
flat blade screwdrivers on each side of shaft.
DO NOT SCRATCH SHAFT. It does not
matter if carbon cracks as it may be replaced
with new part. See Figure 17.
9. Remove ceramic seal face and rubber retain-
ing boot by prying seal out with flat blade
screwdrivers. (Seal can be pressed out with a
screwdriver from the opposite side.) Be
careful not to scratch bronze bushing. Dam-
age to seal is not important, as a new part
must be installed. See Figure 18.
10. Thoroughly clean inside of seal chamber and
pocket where new seal is to be installed. See
Figure 19. Use rags and solvent cleaner.
11. Use care to avoid touching sealing faces with
hands, use protective cardboard circle pro-
vided with seal, while handling. Use an artists
brush to coat bottom outside portion of rubber
retaining boot with conservative application of
STP or equivalent lubrication to ease installa-
tion. See Figure 20.
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