IBC Water AST1041TC-CL, Installation & Operating Instructions Manual

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AS1041TC-CL Page
36
Drive Assembly
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 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 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, 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 wires into the holders and reconnect the motor, and
power plugs. Note the power lead to the socket on the back face is very fragile at the soldered joints.
The drive bracket must be removed to access the drive cap assembly and pistons or the drive gear cover. It is
not necessary to remove the PC board from the drive bracket to remove the drive bracket. To remove the
drive bracket start by removing the four pin plug for the power source. Un weave 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 drive 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. 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 hold, the wires are jammed between the drive bracket
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 instructions above regarding
removing the drive bracket from the drive back plate. 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 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 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