FORD 2009 F-550 v.1 - Manual (Page 402)

3. Pull air filter cover toward passenger side of vehicle and up to release
the tabs. Lift air filter element up and out of housing.
The air filter box needs to be free of any debris before installing a new
air filter.
4. Install a new air filter element into the tray assembly.
5. Return air filter cover to original
position making sure the four tabs
are engaged and secure the three
clamps. Tighten clamp on air tube
and reconnect sensor.
2009 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)
Maintenance and Specifications
402