MAINTENANCE EVERY 250 OPERATING HOURS 29.6 AIR FILTER, REMOVING AND RE-INSTALLING THE FILTER INSERT, CHECKING AND CLEANING THE FILTER INSERT 29.6.1 STRUCTURE OF THE AIR FILTER The air filter consists of the air filter housing, the dust exhaust valve, the filter cartridge and the safety filter. 29.6.2 MAINTENANCE DEMAND If the air filter warning indicator (1) lights up, the air filter car- tridge is dirty. You must clean or exchange it immediately. 1 The filter insert has to be checked for perfect condition and be cleaned every 250 operating hours, no matter whether the con- trol light is lit or not. If the filter insert is damaged or deformed, it must be exchanged.
A dirty safety filter indicates that the filter cartridge is damaged. In this case, both - filter cartridge and safety filter - must be ex- changed. 75_244 tenance". 2 - Open the twistlocks on the cover of the air filter housing (2). 3 - Remove the cover of air filter housing. 4 - Pull out the filter cartridge (3). Clean thoroughly the interior of the filter housing with a cloth. 3 75_246 164 2 75 245 _