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Removal of Old Seal
1. After unscrewing impeller, carefully remove rotating part
of seal by prying up on sealing washer, using two screw-
drivers (see Figure 1A). Use care not to scratch motor
shaft.
2. Remove seal plate from motor and place on flat surface,
face down. Use a screwdriver to push ceramic seat out
from seal cavity (see Figure 1B).
Installation of Floating Seat (Figure 1C)
1. Clean polished surface of floating seat with clean cloth.
2. Turn seal plate over so seal cavity is up, clean cavity
thoroughly.
3. Lubricate outside rubber surface of ceramic seat with
soapy water and press firmly into seal cavity with finger
pressure. If seat will not locate properly in this manner,
place cardboard washer over polished face of seat and
press into seal cavity using a 3/4" socket or 3/4" piece of
standard pipe.
4. Dispose of cardboard washer. Be sure polished surface
of seat is free of dirt and has not been damaged by
insertion. Remove excess soapy water.
5309 0306
Mechanical seal
rotating half
A
Seal removal-rotating half
Figure 1
Mechanical seal
stationary half
Seal Plate
B
Seal removal-stationary half
Installation of Rotating Part of Seal Unit
(Figure 1D)
1. Reinstall seal plate using extreme caution not to hit
ceramic portion of seal on motor shaft.
2. Inspect shaft to make sure that it is clean.
3. Clean face of sealing washer with clean cloth.
4. Lubricate inside diameter and outer face of rubber drive
ring with soapy water and slide assembly on motor shaft
(sealing face first) until rubber drive ring hits shaft shoulder.
5. Screw impeller on shaft until impeller hub hits shaft
shoulder. This will automatically locate seal in place
and move the sealing washer face up against seat facing.
Replacing O-Rings
1. Remove the old O-rings.
2. Clean the O-Ring seating areas.
3. Seat the large O-Ring in the step on the edge of the seal
plate.
4. Seat the small O-Ring between the raised ridges on the
inlet of the Nozzle / Diffuser / Venturi assembly.
Overhaul Kits
Replace seal and O-Rings as described, but use the new
Nozzle / Diffuser / Venturi assembly, and impeller.
Reassemble the pump, being careful to align all parts and
do not over-tighten the 4 capscrews.
3/4" socket
or pipe
Cardboard
washer
(supplied w/seal)
Polished
surface
Rubber
surface
C
Stationary half installation
Shaft
shoulder
Rubber drive
ring
Sealing
face
Impeller
D
Rotating half installation
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