FORD 2011 F-550 v.2 - Manual (Page 159)

To remove an air filter:
1. Turn the vehicle off.
2. Push up on the outside rigid edge
of the filter until the tabs are
released, then rotate the air filter
toward the front of the vehicle.
3. Remove filter.
To install a filter:
1. First, position the filter in
itshousing making sure that the far
forward end is all the way up in the
housing.
2. Push in on the center of the
outside edge of the filter and rotate
up into the housing until it clips into
position.
Seating and Safety Restraints
159
2011 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)