TM 9-4120-407-14
3-18. FRESH AIR DAMPER REPAIR AND REPLACEMENT. (Cont)
(2)
Knob Assembly
NOTE
The following procedures are typical for both knob assemblies.
(b) Remove two drive screws (2) and information plate (3). Discard drive screws.
Figure 3-26. Knob Assembly
c. Repair. Repair is by replacement of damaged or missing components only.
d. Assembly.
(1) Rod. Arm. and Worm Gear Assembly.
( a ) Insert rod (18) Figure 3-25 into first support on bracket (22).
NOTE
Install the following components onto the rod in the order given.
(b) Install new spring washer (19), flat washer (20), worm gear (21), a second flat washer, and a
second new spring washer. Push rod (18) through bracket (22) supports as needed while
installing the components.
(c) Align the holes in worm gear (21) with the hole in rod (18) and install a new spring pin (17).
(d) Install setscrew (15) into extension rod (16).
(e) Install worm wheel gear (13), new lock washer (14), and screw (12) onto arm (11).
(f) Insert screw (8) into hole in one side of bracket (22).
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