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TM 9-2320-364-34-1
g.
Air Line Tightening Procedure.
3
5
1
2
4
(1)
Ensure end of air line (1) is cut square.
(2)
Remove nut (2), ferrule (3) and tube support (4) from fitting (5).
(3)
Position nut (2), ferrule (3) and tube support (4) on air line (1).
NOTE
Air line is properly seated when tube support bottoms out in fitting.
(4)
Install air line (1) in fitting (5) hand tight.
NOTE
Alignment mark allows mechanic to count the number of times the nut has rotated during
tightening.
(5)
Scribe mark on nut (2) and fitting (5).
(6)
Tighten nut (2) until mark on nut (2) has
rotated correct number of turns. (Refer to
5
ALIGNMENT
Air Line
MARKS
2
O.D.
Additional Number of
Turns from Hand-Tight
Size
1/4
3
3/8 and 1/2
4
5/8 and 3/4
3 1/2
2-859
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