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Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 1-800-260-2758 Fax (805) 278-5468
Figure 5. Shaft Seal Removal
9. The mechanical shaft seal is a two-part device,
consisting of a larger, spring-loaded rubber sleeve
and a smaller white ceramic disc with a rubber outer
cover. See Figure 6 and Figure 7. At no time should
the contact surfaces of the two halves be touched
with bare hands or fingers, as this will contaminate
the surface. The disc is pushed into the indentation
in the center of the seal plate with the white ceramic
side facing outward, toward the impeller. Wetting
the rubber outer cover may be helpful. Do not use
lubricant. Press the disc completely into place until
it is fully seated and level. A clean rubber glove or
the rounded handle of a screwdriver may be used
to push the seal into place. The spring portion of the
seal is pushed on to the stem on the back side of
the impeller, again making sure bare hands do not
come in contact with the smooth surface of the black
ceramic point of contact.
Figure 6. Spring Loaded Seal
Figure 7. Ceramic Disc
10. Reattach the flange/seal plate to the motor with the
shaft protruding through the disc, and reinstall the
four bolts to secure.
11. Again, holding the motor shaft stationary with the
screwdriver as before, thread the impeller onto
the shaft, turning clockwise until tight. The spring
will compress and hold the two halves of the seal
together.
12. Using a small screwdriver, pry the old O-ring from
the slot on the diffuser, lubricate the new O-ring, and
install in the slot. See Figure 8.
Figure 8. Diuser O-ring
13. Attach the diffuser to the flange/seal plate with the 3
provided screws.
14. Locate the existing large O-ring on the inside of the
flange/seal plate and replace with the new one, using
appropriate lubricant.
15. Rejoin pump motor and flange with the pump volute,
pushing forward until seated, and reattach with four
bolts. Tighten bolts by alternating across, turning
each one a few turns until they are all tight.
16. Open water valves, if installed, and make sure the
pump is filled with water.
17. Check for leaks.
18. Reconnect the electrical and turn on power.