Macnaught FTWM120-001, Инструкция по эксплуатации

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DISASSEMBLY/REASSEMBLY
The meter can disassemble easily into its primary components without removing the body from
the pipes.
METER UNIT
Disassemble the meter unit as follows:
1. Remove the reset knob by firmly pulling it straight out.
2. Loosen four retaining screws (#22).
3. Loosen two screws (#5).
To reassemble the unit, reverse the above procedure.
MEASURING CHAMBER
To enter the measuring chamber, operate as follows:
1. Disassemble the meter unit as the above steps 1-3.
2. Loosen the eight screws (#7).
3. Remove the body cover (#6), together with the gear unit.
Be careful not to damage the sealing gasket (#16).
4. Remove the whole measuring chamber (#27) by lifting it from the meter body and at the
same time pulling it back towards the inlet in order to remove the O-ring (#17) from its seat
at the outlet.
5. Remove the O-ring (#17) and divide the measuring chamber (#27) into two half to check the
inside of the chamber containing the nutating disk.
To reassemble the chamber, reverse the above procedure. Be sure to:
1. Verify that the nutating disk rotates freely in the assembled chamber.
2. Install the gaskets (#16, #17) properly after inspecting and lubricating them with grease.
3. Make sure that when reattaching the cover to the body of the meter, the nutating disk needle
does not hit the driving lever (#14), which must remain free to be moved by the disk needle.
4. Tighten the screws (#7) completely.
GEAR UNIT
To reach the gear unit components:
1. Remove the cover Assy. (#28).
2. Loosen the screws (#13).
3. Remove the plate (#12). Now all gears can be reached for inspection.
4. Should the gasket (#10) be replaced, remove the bevel gear (#8) from the shaft by pulling
straight out, and then remove the gear unit (#11) together with the shaft.
To reassemble, reverse the above described procedure paying particular attention to:
1. Lubricating the O-ring with grease before installation.
2. Checking that the gear unit can rotate freely before reattaching the cover.
MAINTENANCE
No ordinary maintenance is required if the meter is properly installed and used according to
recommendations. An incorrect filtering on the meter inlet may block or wear out the measuring
chamber, thus affecting the meter accuracy. Should this problem occur, disassemble the
measuring chamber, as shown in section DISASSEMBLY/REASSEMBLY, and evaluate the
filter’s condition.
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