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Replace the motor if necessary. Do not lubricate the motor or the gears. When reinstalling the motor gently turn the
motor while inserting so that the gear on the motor meshes with the gears under the drive gear cover and the small
plastic bulge engages one of the slots on the motor housing. Reconnect the motor plug to the two pronged jack on the
lower left hand side of the PC board. If motor will not easily engage with drive gear when reinstalling, lift and slightly
rotate motor before reinserting.
Replace the valve cover. After completing any valve maintenance, press and hold NEXT and REGEN buttons for 3
seconds or unplug power source jack (black wire) and plug back in. This resets the electronics and establishes the
service piston position. The display should flash all wording, then flash the software version and the cycle number,
(e.g. 164) and then reset the valve to the service position.
DRIVE CAP ASSEMBLY, MAIN PISTON AND REGENERANT PISTON
The drive assembly must be removed to access the drive cap assembly. The drive cap assembly must be removed to
access the piston(s). The drive cap assembly is threaded into the control valve body and seals with an o-ring. To
remove the drive cap assembly use the Service Wrench, V3193, or insert a ˘" to 5/16" flat bladed screwdriver in
to one
of the slots around the top 2" of the drive cap assembly so it engages the notches molded into the drive back plate
around the top 2" of the piston cavity. See Figure 5. The notches are visible through the holes. Lever the screwdriver
so the drive cap assembly turns counter clockwise. Once loosened unscrew the drive cap assembly by hand and pull
straight out.
figure 5
The drive cap assembly contains the drive cap, the main drive gear, drive cap spline, piston rod and various other
parts that should not be dissembled in the field. The only replaceable part on the drive cap assembly is the o-ring.
Attached to the drive cap assembly is the main piston and if a regenerant is used, a regenerant piston.
The regenerant piston (the small diameter one behind the main piston) is removed from the main piston by pressing
straight sideways to unsnap it from its latch. Chemically clean in dilute sodium bisulfite or vinegar or replace the
regenerant piston if needed. To remove the main piston, fully extend the piston rod by turning the main drive gear
counter clockwise, and then unsnap the main piston from its latch by pressing on the numbered side. Chemically
clean in dilute sodium bisulfite or vinegar or replace the main piston.
