TM 9-2320-280-20-3
11-199. DUCT DOOR CONTROL CABLES MAINTENANCE (Cont’d)
g. Cable Adjustment
1. Heater intake cable adjustment.
(a) Place top lever (2) on control box (1) in A/C-VENT position.
(b) Adjust turnbuckle (6) on cable (7) until duct door arm (5) is all the way up (duct door fully
2. Evaporator intake cable adjustment.
(a) Place bottom lever (3) on control box (1) in UNIT OFF position.
(b) Adjust tumbuckle (8) on cable (9) until duct door arm (4) is all the way up (duct door fully
3. Heater/air-conditioning outlet cable adjustment.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
Remove two screws (13) and lockwashers (12) from plate (11) and evaporator duct (10). Discard
lockwashers (12).
Remove two capscrews (14), lockwashers (15), and plate (11) from evaporator duct (10). Discard
lockwashers (15).
Place top lever (2) on control box (1) in HEAT position.
Adjust turnbuckle (17) on control cable (16) until duct door arm (18) is all the way down (duct
door all the way up).
Place top lever (2) on control box (1) in A/C-VENT position.
Adjust turnbuckle (17) on control cable (16) until duct door arm (18) is all the way up (duct door
all the way down).
Install plate (11) on evaporator duct (10) with two lockwashers (15) and capscrews (14).
Install plate (11) on evaporator duct (10) with two lockwashers (12) and screws (13).
11-300
