59Maintenance and Service5.10.5 Inserting panel air filters1. Insert the thoroughly cleaned or newpanel air filter (Fig. 24/5) from thecorrect side in the filter supportframe.Pay attention to the labeling onthe side of the panel air filter(Fig. 24/5)!2. Replace the filter cover (Fig. 24/8).3. Close the bottom filter cover locks:Pivot the hinged locks (Fig. 24/6)over the edge of the filter cover(Fig. 24/8).4. Close the top filter cover locks:Screw the knurled screws (Fig. 24/1)on the threaded pins (Fig. 24/4).5. Close the hood (Fig. 24/7) so that itaudibly locks.5.10.6 Checking the suction turbine1. Switch the machine on,refer to paragraph 3.3.1.2. Clean a dusty surface for testpurposes, refer to paragraph 3.3.4.3. Switch the machine off,refer to paragraph 3.3.5.4. Remove the dirt hopper, refer toSection 5.9.1.5. Check whether dust hasaccumulated on the inner side of thepanel air filter (Fig. 24/5).6. If you have the impression that thesuction turbine does not work or dustescapes from the machine, contact aHako service center.Do not open the hood(Fig. 24/7) when the engine isrunning. Risk of injury throughbelt drive and rotatingfan(Fig. 24/3)!5.10.7 Checking the filter system forleaksDo not open the hood (Fig. 24/7) when the engine is running.Risk of injury through belt driveand rotating fan (Fig. 24/3)!1. When the engine is switched off,hood (Fig. 24/7) is open and filtercover (Fig. 24/8) removed, checkwhether dust escapes at the edgesof the panel air filter (Fig. 24/5).2. If this is the case, check the sealingstrips (Fig. 24/2), refer to paragraph5.10.4 and replace, if necessary.3. Check the panel air filter (Fig. 24/5)and replace, if necessary. The frameof the panel air filter(Fig. 24/5) must not be twisted norshow signs of damage. Ensure thatthe panel air filter (Fig. 24/5) hasbeen inserted true to side, refer toparagraph 5.10.5.4. Repeat this test a certain time aftercleaning. If dust continues to escapeat the edges of the panel air filter(Fig. 24/5), contact a Hako servicecenter.