16Maintenance & CareWasherThe top of the hand piece isequipped with a white washer (art.no. 4571). This washer has to bereplaced by a new one every 50operation hours, unless exchang-ing it, water could enter the handpiece and cause of damages ofthe internal parts. The LED (8)will light if a change of the wash-er is necessary.Exchanging the washerRemove the washer with tool (art.no. 6475).Put on the tool between theLEDs. If you set the tool onthe LED, they may break.Push the new washer in the top.Now press button (9) to make theLED (8) go out.Water FilterEven smallest parts of dirt couldblock the nozzle, which sits in thetop. Avoiding such blockages, thereis a water filter installed in the capof the tank. We recommend tochange this every time, when it iscovered with some dirt, at leasttwice a year. Still make sure, noparts of dirt enter the tank and rinseit quite regularly.Changing the water filterTake off the cap of the tank. Holdthe metal piece (A) in one hand andscrew off the water filter (B).Now you can screw on the newfilter.