Service Instructions
24
Remove the valve cover to access the drive assembly.
Disconnect the power source plug (black wire) from the
PC board prior to disconnecting the motor or water meter
plugs from the PC board. The motor plug connects to the
two-pin jack on the left-hand side of the PC board. The
power source plug connects to the four-pin jack. The four-
pin jack is between the two-pin and three-pin jacks. The
water meter plug (gray wire) connects to the three-pin jack
on the far right-hand side of the PC board.
The PC board can be removed separately from the drive
bracket but it is not recommended. Do not attempt to
remove the display panel from the PC board. Handle the
board by the edges. To remove the PC board from the
drive bracket, unplug the power, water meter and motor
plugs from the PC board. Lift the middle latch along the
top of the drive bracket while pulling outward on the top
of the PC board. The drive bracket has two plastic pins
that fit into the holes on the lower edge of the PC board.
Once the PC board is tilted about 45° from the drive
bracket it can be lifted off of these pins. To reinstall the PC
board, position the lower edge of the PC board so that the
holes in the PC board line up with the plastic pins. Push
the top of the PC board towards the valve until it snaps
under the middle latch, weave the power and water meter
wires into the holders and reconnect the motor, water
meter and power plugs.
The drive bracket must be removed to access the drive cap
assembly and pistons or the drive gear cover. It is not nec-
essary to remove the PC board from the drive bracket to
remove the drive bracket. To remove the drive bracket start
by removing the plugs for the power source and the water
meter. Unweave the wires from the side holders. Two tabs
on the top of the drive back plate hold the drive bracket in
place. Simultaneously lift the two tabs and gently ease the
top of the drive bracket towards your body. The lower edge
of the drive bracket has two notches that rest on the drive
back plate. Lift up and outward on the drive bracket to dis-
engage the notches.
To reassemble 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.
To inspect drive gears, the drive gear cover needs to be
removed. The drive gear cover is held in place on the drive
bracket by three clips. The largest of the three clips is
always orientated to the bottom of the drive bracket.
Before trying to remove the drive gear cover, the drive
bracket must be removed from the drive back plate. The
drive gear cover can be removed from the drive bracket
without removing the motor or the PC board.
Simultaneously, push in and down on the large clip at the
bottom and the clip on the left-hand side of the drive
bracket behind the PC board. Keep your other fingers
behind the drive gear cover so the drive gears do not drop
on the ground.
Replace broken or damaged drive gears. Do not lubricate
any of the gears. Avoid getting any foreign matter on the
reflective coating because dirt or oils may interfere with
pulse counting. The drive gear cover only fits on one way,
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.
The drive bracket does not need to be removed from the
drive plate if the motor needs to be removed. To remove
the motor, disconnect the power and motor plugs from the
jacks on the PC board. Move the spring clip loop to the
right and hold. Rotate the motor at least a 1/4 turn in either
direction before gently pulling on the wire connectors to
remove the motor. Pulling directly on the wires without
rotating the motor may break the wires off the motor.
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 mesh-
es with the gears under the drive gear cover and the small
plastic bulge engages one of the slots on the motor hous-
ing. 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.
Drive Assembly
