Maintenance of Major Components
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5.3.3. Cleaning filter elements
By compressed air
(wear goggles)
-
For the purpose, the air gun should be
fitted with a nozzle extension which is
bent 90° at the discharge end and
which is long enough to reach down
inside to the bottom of the element.
-
Moving the air gun up and down, blow
out the element from the inside
(maximum 500kPa - 5 bar) until no
more dust comes out of the filter pleats.
By washing
-
Before washing, the element should
be precleaned by means of
compressed air, as described above.
-
Then allow the element to soak in
lukewarm washing solvent for 10
minutes, and then move it to and for in
the solvent for about 5 minutes.
-
Rinse thoroughly in clean water,
shake out and allow drying at room
temperature. The cartridge must be
dry before it is reinstalled.
-
Never use steam sprayers, petrol
(gasoline), alkalis or hot liquids etc. to
clean the filter elements.
Knocking out dirt by hand
-
In emergencies, when no compressed air or cleaning agent is available, it is possible to clean the
filter cartridge provisionally by hitting the end disk of the cartridge with the ball of one's thumb.
-
Under no circumstances should the element be hit with a hard object or knocked against a hard
surface to loosen dirt deposits.
Checking the filter cartridge
-
Before reinstalling the cartridge, it must
be checked for damage e.g. to the paper
pleats and rubber gaskets, or for bulges
and dents etc. in the metal jacket.
-
Cracks and holes in the paper pleating
can be established by inspecting the
cartridge with a flashlight.
-
Damaged cartridges should not be
reused under any circumstances. In
cases of doubt, discard the cartridge
and install a new one.
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