72 05-7177-00.fmMaintenance and Servicing5.4.4 Cleaning the solution tank1. Empty the solution tank, see section 5.4.3.2. Turn and remove the cover of the maintenance opening Fig. 28-29.3. Unscrew the cover of the cleaning opening Fig. 28-21.4. Feed the water hose through the cleaning opening and clean the solutiontank thoroughly.5. After cleaning the tank, close the cleaning opening with the cover.6. Place the cover onto the maintenance opening and screw tight.7. After filling the solution tank, check the cover of the maintenance unit forleak tightness. If necessary, screw the cover tighter.5.4.5 Cleaning the fresh water filterCheck the filter sieve Fig. 30-B of the fresh water filter Fig. 28-24 weekly andclean or replace it as required.1. Close the ball cock Fig. 28-B.2. Turn and remove the filter cover Fig. 30-A.3. Remove the filter sieve Fig. 30-B from the filter housing and clean it underrunning water. Replace the filter sieve as required.4. Reinsert the filter sieve and filter cover and open the ball cock.AttentionOverflowing water! Only open the cleaning opening Fig. 28-21 whenthe solution tank is empty.NoteTo facilitate loosening and closing the cover of the maintenanceunit, use the supplied handle Fig. 28-A.Fig. 30:AB