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 TM 5-4120-393-14
4-33.
Fresh Air Damper (cont)
INSTALLATION
1.
Using screwdriver and wrench, secure bracket (39) to casing with four screws (36), flat washers (37) and nuts (38).
2.
Reinstall rubber grommet (40) in front and rear of casing, if they were removed or missing.
3.
Install knob (26) on rod end (33), if it was removed.
4.
Insert rod (33) through grommet (40) in rear of casing and through first hole in bracket (39).
5.
Install spring washers (34), flat washers (35), and worm gear (30) and insert rod (33) through remaining bracket (39)
hole.
6.
Align holes in worm gear (30) and rod (33) and install spring pin (29).
7.
Slip extension rod (32) onto end of rod (33), align setscrew (31) with flat on end of rod (33) and tighten setscrew (31)
with allen wrench.
8.
Using two wrenches, install spacers (20), spring washers (19), and gear arm as sembly (18) with cap screw (14), flat
washer (15), lock washer (16), and nut (17).
4-70
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