MAINTENANCE EVERY 250 OPERATING HOURS CLEANING OR EXCHANGING THE FILTER CAR- TRIDGE Depending on the degree of contamination, the air-filter insert can be cleaned using compressed air or water to which a mild detergent can be added. The air-filter insert must be replaced, if the air-filter con- trol light lights up only short time after cleaning. Do not clean the safety filter (refer to chapter "Air Filter, Replacing the Filter Insert, Replacing the Safety Filter"). a) Cleaning with compressed air Whirled up dust particles may hurt the eyes! Use goggles if you clean the filter cartridges with com- pressed air. Dangerous dust particles may irritate the lung!
Use a dust-protection mask if you clean the filter cartridg- es with compressed air. Blow out the air filter cartridge with dry compressed air (max. 6 bars) starting with the interior and then proceeding to the out- side. The air nozzle is to be moved up and down the paper with a minimum distance of 1.181 in (3 cm). You can stop the clean- ing if no more dust comes out. Do not clean the cartridge by hitting it or by beating it against other objects. b) Cleaning with water and cleaning agents After the dust has been blown out, the filter cartridge can also be additionally cleaned using warm water with a mild cleaning agent max. 122°F (50°C) to remove adhering oil, grease, soot, etc.
For this purpose, swing the cartridge back and forth in the solution. Then, rinse the filter cartridge with clean water starting with the inside and then proceeding to the outside (max. 3 bars) and let it dry at a temperature of max. 122°F (50°C). 7-50