Drive Assembly - Reassembly:
If the drive gear cover was removed, reinstall it with the large clip orientated towards the
bottom. If all three clips are outside of the gear shroud on the drive bracket the drive gear
cover slips easily into place.
To reinstall the drive bracket, seat the bottom of the drive bracket so the notches are
engaged at the bottom of the drive back plate. Push the top of the drive bracket towards the
two latches. The drive bracket may have to be lifted slightly to let the threaded piston rod
pass through the hole in the drive bracket. Maintain a slight engaging force on top of the
drive bracket while deflecting the bracket slightly to the left by pressing on the side of the
upper right corner. This helps the drive gears mesh with the drive cap assembly. The drive
bracket is properly seated when it snaps under the latches on the drive back plate. If
resistance is felt before latching, then notches are not fully engaged, the piston rod is not in
hole, the wires are jammed between the drive bracket and drive back plate, or the gear is
not engaging the drive cap assembly. Replace the motor if necessary. Do not lubricate the
motor or the gears. To reinstall the motor, move the spring clip loop to the right and hold.
Gently turn the motor while inserting so that the gear on the motor meshes with the gears
under the drive gear cover. Release the spring clip loop and continue to rotate the motor
until the motor housing engages the small plastic bulge inside the drive bracket motor
retainer. Reconnect the motor plug to the two-pronged jack on the lower left hand side of
the circuit board. If the motor will not easily engage with the drive gear when reinstalling, lift
and slightly rotate the motor before reinserting. Reconnect the power plug.
Replace the valve cover. After completing any valve maintenance, press and hold NEXT
and REGEN buttons for 3 seconds. This resets the electronics and establishes the service
piston position. The display should flash all wording, then flash the software version and
then reset the valve to the service position.
Drive Cap Assembly - Disassembly and Inspection
After removing the drive bracket assembly the drive back plate can be removed by
squeezing the 2 locking tabs (located at 3 and 9 o-clock around the white gear) and rotating
the back plate counter clockwise. The four screws can then be removed and the drive cap
pulled straight back out of the valve. Turning the main gear counter clockwise drives the
piston in and may aid in pushing out the cap.
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. Visually inspect the
drive cap for damage and free operation of the gear and threaded rod. The only replaceable
part on the drive cap assembly is the O-ring.
Main Piston and Brine Piston - Disassembly and Inspection
Attached to the drive cap assembly is the main piston and the brine piston. The brine piston
(the small diameter one behind the main piston) is removed from the main piston by
unsnapping it from its disassembly latch. To remove the main piston, fully extend the piston
rod and then unsnap the main piston from its latch by pressing on the side with the number.
Chemically clean the piston in dilute sodium bisulfite or vinegar, or replace them.
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