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| MIL-T-81838(AS)
4.6.2.3.3
Close switch, "C" will open allowing fuel to flow through
"A" and "D" to tank.
4,6.2.3.4
Observe "T", Pressure will not exceed 1 psi.
When tank is full, "I" will open, closing "C" which in turn
4.6.2.3.5
will close "A", shutting off fuel flow.
Check "0", 10 drops per minite allowable fluid leakage.
4.6.2.3.6
Open "Q", allow approximately 1 pint to drain, close,
4.6,2.3.7
wipe dry and check for leakage, none being allowable.
Close "U".
4.6.2.3.8
Set "S" at 3,7,10,15 and 20 psi successively holding each
4.6.2.3.9
pressure for at least one (1) minute. Check "K", "H", "G", "D", "E", "F" and
"Q" for fluid leakage at each pressure - none allowed. "O" may leak in excess of
10 drops per minute at these pressures; however, leakage at any pressure shall
not exceed 10 cc per minute.
During the previously listed checks, there will be a contin-
4.6.2,3,10
uous bleed of air out of "O" which comes from the 0.033 inch diameter thermal
relief orifice incorporated in "W".
Set "S" at 10 psi, open "U", and fuel will flow out "D" line.
4.6.2,3.11
4.6.2.3.12
After approximately 3 minutes, shut "U" and open "R", and
then fuel will flow out of "F" line.
4,6.2.3.13
After one (1) minute, shut "R" and "S" and allow tank pres-
sure to go to zero.
4.6.2.3.14
Remove and reinstall "K".
Open "S" and set at 10 psi. All OW tank pressure to build up
4.6.2.3.15
to 10 psi. Check "K" for leakage - none allowed, Open "U" and allow fuel to flow
out of tank until tank is empty.
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