TM 55-1520-240-23-8
10-118
VENT SYSTEM FLOW TEST
(Continued)
10-118
NOTE
Procedure is same to test any fuel
tank. Test of No. 1 (left) forward fuel
tank is shown.
1.
Straighten hoses (1 and 2) to plug (3).
2.
Close valves (4 and 5).
3.
Open valve (6).
4.
Connect two hoses (7 and 8) to fittings (9 and
10).
5.
Open valves (4 and 5).
6.
Check gage (11). Gage shall read 24 to 30 psi.
7.
Check gage (12). Gage shall read 1 to 3 psi.
8.
Slowly close valve (6). Check gage (12). Two
valves (13 and 14) shall open when gage
indicates 5 psi.
9.
Gage (12) shall indicate 6 psi with valve (6)
closed. Two valves (13 and 14) shall be venting
equally.
Do not continue test if pressure
exceeds 6 psi. Damage to personnel
and equipment could occur.
10.
Open valve (6).
11.
Close valves (4 and 5).
12.
Check gage (15). Gage shall read 0 psi.
13.
Remove cap (16) from fuel tank (17).
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