Cavitator
07/2014 456424-US Page
11
Internal shaft seal
7.2
Disassembly
1. Undo the housing screws and carefully remove the Cavitator
housing. Unscrew the cap nut from the shaft and take off the rotor.
2. Remove the stationary seal face with the O-ring mounted in the back
plate.
3. Remove the rotary seal face with the O-ring from the rotor.
4. Clean the stator and rotary seal face locations, if necessary with air
or water.
5. Check the seal drive pins in the rotor for damage and for correct
length: max. 2.5 mm / min. 2 mm (max. 0.98” / min. 0.79”).
6. New parts can now be mounted.
Assembly
1. Fit the stationary seal face with the O-ring in the back plate without
using tools. Moisten the O-ring with water. The “notches” in the
stationary seal face must mate with the drive pins on the carrier in
the back plate.
2. Fit the rotary seal face with the O-ring in the rotor. Ensure that the
slot in the seal ring is aligned with the pin in the rotor.
External shaft seal
7.3
Disassembly
1. After the rotor has been dismantled, loosen the screws and bracket
that fit the back plate to the extension frame. Carefully remove the
back plate by taking it over the shaft.
2. Remove the stationary seal face with the O-ring from the fixing kit
mounted on the back plate.
3. Remove the rotary seal face with the O-ring from the shaft.
4. Clean the stator and rotary seal face locations (if necessary) with air
or water.
5. Mount the new parts.
Assembly
1. Fit the stationary seal face by hand with the O-ring in the fixing kit.
Moisten the O-ring with water. The “notches” in the stationary seal
face must mate with the driving dogs on the carrier in the back plate.
2. Fit the rotary seal face with the O-ring in the shaft.
NOTE:
Do not use oil or grease when mounting the rotary seal face
on the shaft.
