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5.3 Filter Replacement and Restriction Maintenance
Filter replacement and restriction maintenance methods
■ Introduction
Contamination from the instrumentation air that collect in the restriction unit of the
device can be removed during maintenance. For the instrumentation air, use dry air
which has been cleared of solid particles up to 3 µm in size (or less). Be sure to use a
Phillips head screwdriver for the procedure below.
■ Replacement and maintenance procedure
Step Procedure
1 Cut off the air supply to the device.
2
Remove the setscrews from the changes of the A/M switch unit.
Note
When removing the screws, be careful not to drop the washers, corrugated washers, etc.,
from the A/M switch cover plate.
3 Rotate the A/M switch in the MAN direction.
4
Use nippers or the like to cut the holder and remove the old filter.
Note
Dispose of the old holder and filter appropriately.
5
Use wire (diameter 0.3mm) or the like to remove contaminants from the throttle.
Note
When removing the contaminants, be careful not to damage the restriction. Do not use an
air gun. Also, make sure that there is no oil on the restriction.
6 Wrap the new filter around the A/M switch, and press it into place with the holder.
7 Screw down the A/M switch until it stops, and insert the O-ring into the groove.
8 Assemble the product nameplate of the A/M switch unit with the A/M switch cover plate
using the setscrews.
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