Installation and Service Manual – L Series Reverse Osmosis System
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Page 25
Mechanical Seal Changeout
(refer to figures above)
This procedure is best completed with the pump held in a vertical position, motor down.
First, complete “Disassembly” instructions 1 through 5 under “Impeller Stack Changeout.” (see previous page)
6. Remove 4 capscrews holding pump body to motor. Pump handle will come off with top capscrews.
7. Unscrew pump shell from pump body, turning clockwise (left hand threads).
8. Remove mechanical shaft seal spring and rotating half from motor shaft. Use care not to scratch motor shaft when
removing rotating half.
9. Remove pump body from motor and place on flat surface, face down. Again, use care not to scratch motor shaft.
10. Use a screwdriver to push ceramic seat out from seal cavity as shown.
11. Installation of ceramic seat:
a. Turn pump body over so seal cavity is up; clean cavity thoroughly.
b. Clean polished surface of ceramic seat with a clean cloth.
c. Lubricate outside rubber surface of seat with soapy water. Place cardboard washer over polished face of
seat and press into seal cavity using a 3/4" socket or a piece of 3/4" standard pipe.
d. Be sure polished surface of seat is free of dirt and has not been damaged by insertion. Remove excess
soapy water. Dispose of cardboard washer.
12. Installation of rotating half and spring:
a. Reinstall pump body on motor using extreme caution not to hit ceramic portion of seal on motor shaft.
Reattach pump body to motor using capscrews. Be sure to reinstall pump handle at this time.
b. Inspect shaft to make sure that it is clean.
c. Clean face of rotating half of seal with a clean cloth.
d. Lubricate inside diameter of rotating half with soapy water and slide onto motor shaft (sealing face first).
e. Place spring over motor shaft so it rests on rotating half.
13. To complete reassembly from this point, reverse instructions 1 through 5 under “Impeller Stack Changeout.”
NOTE:
Lubricate suction and discharge O-Rings with soapy water for easier installation of shell.
