4-17. DAMPERACTUATOR AND VENTILATION DAMPER. - Continued.
(6) Open and close ventilation damper (21) by rotating actuator nut (10) and check damper actuator
mechanism for smooth operation. If binding occurs or door does not open as required. Repeat steps (2) through (5) until
proper operation is observed.
(10) Install ventilation air filter and guard (see para. 3-23).