TM 9-2320-361-20 14-32. PRIMARY HEATER AND DUCT REPLACEMENT (Contd) b. Duct Removal 1. Remove screw (3) and strap (2) from frame (1). 2. Remove two screws (8), screw (9), and strap (7) from deflector (11) and van wall (13). 3. Remove three screws (10) and deflector (11) from floor (12). 4. Remove clamp (5) and adapter (6) from duct (4). c. Duct Installation 1. Install adapter (6) and clamp (5) on duct (4). 2. Install deflector (11) on floor (12) with three screws (10). 3. Install strap (7) and deflector (11) on van wall (13) with two screws (8) and screw (9). Buckle strap (7) on adapter (6). 4. Install strap (2) on frame (1) with screw (3). Buckle strap (2) on duct (4). 14-50