TM 9-4120-399-14
c. Installation.
Be sure back edge of filter lays on top
(1) Install air conditioning filter (5) into unit.
of filter bracket.
(2) Install three retainers (4), three flat washers (3), three lock washers (2), and three
screws (1).
(3) Install intake (return air) guard. (See para. 3-5).