TM 9-4120-407-14
3-18. FRESH AIR DAMPER REPAIR AND REPLACEMENT. (Cont)
(b) Install Actuator Mounting Bracket Panel.
1
Install panel (5) Figure 3-23 and eight screws (4).
Be careful when moving refrigerant tubing, a kink or any other
damage can result in a leak or reduced refrigerant flow.
2 Carefully insert the actuating linear cylinder (3) and place on panel (5). Install two
nuts (2).
3
Place damper arms (6) onto actuating linear cylinder (3) and install two new self locking
nuts (1). Do not tighten self locking nuts.
4
Check that damper vanes (7) are in the closed position. Tighten two self locking
nuts (1).
5 Install actuating cylinder cover. See paragraph 3-14.
(2) Panel/Cover.
(a) Be sure fresh air damper is in open position. Rotate knob (1) Figure 3-22 in OPEN direction if
necessary.
(b) Install panel (9) and eight screws (4).
Over tightening the retaining hardware can cause binding of the
assembly and affect operation of the equipment.
(c) Adjust the fresh air damper knob (1) in CLOSE direction to align holes in arm (10) and
bracket (11). Install screw (7), bushing (8), flat washer (6), and new self locking nut (5).
Tighten only as needed to secure the components and still allow free movement of the arm and
bracket.
(d) Install two covers (3) and 20 screws (2).
NOTE
FOLLOW-ON MAINTENANCE:
Install air filters. See para 3-16.
3-78
