Drive Assembly
Remove the valve cover to access the drive assembly.
WARNING:
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 power source plug
connects to the four-pin jack. The motor plug connects to the
two-pin jack on the left-hand side of the PC board. The water
meter plug (grey 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
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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 neces-
sary 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 forward.The lower edge of the drive bracket
has two notches that rest on the back plate. Lift up and
outward on the drive bracket to disengage 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 toward 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. Main-
tain a slight engaging force on top of the drive bracket while
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side of the upper right corner. This helps the drive gears
mesh with the drive cap assembly. The drive bracket is prop-
erly 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 drivebracket and drive back plate, or
the gear is not engaging the drive cap assembly. To inspect
the drive gears, the drive gear cover needs to be removed.
Before trying to remove the gear cover, the drive bracket
must be removed from the drive back plate. (Refer to the
proceeding instructions regarding removing the drive bracket
from the drive backplate. The drive gear cover can be
removed from the drive bracket without removing the motor
or the PC board.) 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. With the
PC board facing up, push in and down on the large clip on the
drive gear cover. Handle the cover and the gears carefully so
that the gears do not fall off of the pegs in the cover.
Replace broken or damaged drive gears. Do not lubricate
any of the gears. Avoid getting any foreign matter on the
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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 ¼ turn in either direction so
the wires are vertical (up & down) 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. 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 wires are horizontal and 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 PC
board. If the motor will not easily engage with the drive gears
when reinstalling, lift and slightly rotate the motor before
reinserting. Reconnect the power.
Replace the valve cover. After completing any valve mainte-
nance, 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
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valve to the service position.
5-3
SECTION 5: CONTROL VALVE SERVICE INSTRUCTIONS
