. MAINTENANCE MAINTENANCE PROCEDURE MAINTENANCE MAINTENANCE PROCEDURE at the top, install to the air cover, then release at 3 and 4 - 19 7. Set cover cleaner bo dy, then secure wit h clip 8. Press the b utton of dust indicator ( 1) to r eturn the red piston to its original position. Replacing Ele 1. Open up t he engin places and detach c ove clips (2) 2. Remove o uter element (4). Do not rem ove inne r element (5) a t this time, howeve 3. Clean the interior air body (3) evacuator valve (6). 4. Remove in immediatel 5. Set the ne w outer e lement (4) in p ositio