- Remove the switch and control panel 3 in the cab.
- Remove the glove storage compartment with drawers 1 in the cab.
- Remove the cover sheet 2 in the cab.
- Remove the left and right air hoses 1 from the cover sheet 2 (Fig. B 1313).
- Disconnect the terminal board from the temperature sensor 4 under the cover plate 2.
- Remove the filter from the distribution box.
- Clean or replace the filter with a new one.
- When installing a filter, follow the procedure in reversed order.