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TM 9-2320-364-20-4
2-3219
g.
Air Line Tightening Procedure
(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 allow 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. (Ref to Table 2-68).
Table 2-68. Air Line Tightening.
Air line
Additional Number of
O.D. Size
Turns from Hand-Tight
1/4
3
3/8 and 1/2
4
5/8 and 3/4
3 1/2
ALIGNMENT
MARKS
2
5
5
4
2
1
3
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