Susteco BIGHANNA T120, Operation Manual, Page: 117 / 139

9.2.2 CHECK ALL WARNING LABELS
Replace warning labels if worn.
9.2.3 CLEAN VENTILATION PIPES TO FAN.
Clean all piping leading from front end to the fan (from number 6 to 8).
9.2.4 CHANGE VENTILATION FILTER IF WORN.
Change ventilation filter if worn. Article no 110090.
9.2.5 TEST FUNCTION OF HEATER AND INSPECT FOR WEAR.
Heater is positioned in the front end under the hood. Replace if worn.
9.2.6 INSPECT THE WHEELS FOR WEAR.