. MAINTENANCE MAINTENANCE PROCEDURE 4 - 59 Cleaning Fresh Air Filter 1. Pull u p pop-up rivet (4) of t he air in take duct a t the left rear of the op erator's seat. Cover (5) will be released automatically 2. Pull u p externa l filte r (6 3. Clean external filter (6) by compressed there is oil stuc k to t he f ilter or it is extremely d irty, wash it in a neutr After washing, sing again 4. Install cleaned filter (6) and then fi x cover (5). Insert f ilter (6), p aying attention to th e top and bottom