Fayat Bomag BP 25/50 Operating Instruction, Maintenance Instruction page 69

Maintenance – Weekly
Assembling the air filter
Fig. 50
72
NOTICE!
Danger of engine damage!
– Insert the air filter .
14. Pull the foam rubber element (5) over the paper element (4).
15. Install the rubber seal (6).
16. Insert the air filter correctly and tighten it with the wing nut
(3).
17. Reassemble the housing cover (2) with the wing nut (1).
BP 25/50