TM 9-4120-407-14
(c) Lift damper crank bells (3) and (4) to release shaft end of damper vanes (5).
(d) Carefully flex damper vane (5) enough to free it from the bottom bearing (6) and remove
damper vane. Repeat for each damper vane.
(e) Remove 16 bearings (6).
b. Installation.
(1) Evaporator Air Discharge Grille.
Install grille (3) Figure 3-8, 12 screws (1), and flat washers (2).
(2) Evaporator Air Return Grille.
(a) Install grille (8), 12 screws (6), and flat washers (7).
(b) Install knob (5) and tighten setscrew (4).
(3) Condenser Air Damper Vanes.
(a) Install 16 bearings (6) Figure 3-9.
(b) Insert the longer shaft end of damper vane (5) through the top bearing (6). Carefully flex
damper vane enough to insert the short shaft end into the bottom bearing. Repeat for each
damper vane.
(c) Install the damper crank bells (3) and (4). Press onto the damper vane (5) shafts.
(d) Move damper crank bells (3) and (4) to check for smooth movement of the damper vanes (5).
(e) Install two screws (2) and four new self locking nuts (1). Do not tighten self locking nuts.
NOTE
Damper crank bells must pivot freely on actuating cylinder to prevent
binding when the damper vanes open and close.
(f) Check that damper vanes (5) are in the closed position. Tighten four self locking nuts (1)
against actuating cylinder (7). Be sure damper crank bells (3) and (4) pivot freely on
screws (2).
(g) Install actuating cylinder cover assembly. See paragraph 3-14.
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