Watts W100T Twin Alternating Series - Manual (Page 41)

W100T Twin Alternating Series Softeners 41
Servicing Transfer Cap Assemblies
The control valves backplate must be removed first to
allow access to removing the transfer cap assembly.
Hold slight downward pressure on the top left corner of
the backplate while using a thin flat screwdriver or knife
blade to push in on the locking tabs, this will release
the backplate and it will twist to the left off of the valve
body. For removal of the drive motor side you will need to
remove the drive cover assembly to access the motorized
drive. The drive motor can be removed by pressing the
spring clip loop to the right then rotate the motor a ¼ turn
and pull outward to remove the motor from the reducing
gear cover assembly. Remove the three Phillips head
stainless steel screws that retain the reducing gear cover
to the drive cap. Once the cover is removed you have
access to the reducing drive gears simply slide them off
of the gear axles with your fingers to inspect / check them
there are 3 small black gears with foil decals and 1 larger
black reducing gear. Remove the large white drive gear
from the stainless steel drive shaft. To remove the large white transfer drive gear firmly grab the outside edge of the gear with your fingers and
pull it outward away from the control valve assembly. Now you can use a 5/32” or 4mm allen wrench to remove the ¼-20 screws that retain the
transfer drive cap assemblies on both sides of the valve.
Once the screws are removed from retaining the inlet side transfer valve cap and the outlet drive motor transfer cap from the control valve the
cap will spring out away from the valve body. At this point the transfer discs may be removed by pulling the discs outward off of the shaft away
from the valve body with your hand. With the disc out you can inspect the flat surface area to be sure it’s clean and smooth free of any debris
or scratches. Note that the disc is keyed to the drive shaft so that it will only assemble in one orientation. The transfer discs may be chemically
cleaned with a dilute sodium bisulfate solution, vinegar or just wiped with a soft clean cloth.
To remove seals gently pull out on the outer lip of the seal to lift the seal out from its cavity
being careful not to damage the face surface of the seal. To reassemble re-seat seals
into the seal cavity of the control valve body being sure that the lip of the seal is facing
outward. With seals in place put a thin film of Dow #7 on the tops of the seals and the
flat surface of the discs. Prior to reinstalling the discs the drive shaft should be removed
and the O-rings cleaned, inspected and lubricated with Dow #7. The shaft can then be
installed into the disc prior to installation. With the outlet disc assembled to the shaft the
orientation of the shaft to inlet disc can be assured by installing the set with the through
hole on the outlet disc at the 6 o’clock position.
The easiest thing would be to remove both disc drives and assemble the outlet side first.
Then each disc could be fitted on the shaft individually. At this point the transfer valve cap
assemblies can be reinstalled.
Release locking tabs
from each side to
remove back plate.
Seal "Lip"
feature