5.6.3. Cleaning filter elements z 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 500 kPa - 5 bar) until no more dust comes out of the filter pleats. EA6O5014 z 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 EA6O5015 before it is reinstalled. Never use steam sprayers, petrol (gasoline), alkalis or hot liquids etc. to clean the filter elements. z 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.
z 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. EA6O5016 Maintenance of Major Components - 144 -