Clack Valves WS1.5, Инструкция по установке и обслуживанию

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Page 12 WS1.5", 2" and 2"QC Drawings and Service Manual
Service Instructions
1) Drive Assembly
Disassembly and Inspection:
Remove the valve cover to access the drive assembly.
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. Disconnect the power source plug (4 pin, black cable)
from the PC board prior to disconnecting any other plugs from the PC board. Disconnect and MAV/ AUX drive motors (2 pin,
black cable) from the PC board. Disconnect the water meter plug (3 pin, grey cable), located on the far right side of the PC board.
Unweave the wires from the side holders. Two tabs on the top of the drive back plate hold the drive bracket in place. Si mul ta neous ly
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 disengage the notches.
To inspect the drive reduction 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. 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 re
fl ective coating because dirt or oils may interfere with pulse counting.
The drive bracket does not need to be removed from the drive plate if the motor needs to be removed. To remove the motor,
dis con nect 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 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. Visually inspect the motor for free spinning and remaining brush
life (visible through slots on the size of the motor). Check the pinion gear for endplay. If the pinion gear is pushed tight against the
motor housing, eliminating endplay, slide it away from the housing so the end of the shaft is
fl ush with the end of the gear.
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
fi t 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.
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 de
fl ecting 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.