TM-9-2330-356-14
SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1
TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1990
TM-9-2330-356-14 - Page 59 of 528
TM 9-2330-356-14
Figure 2-17. Typical Emergency Valve Cable Installation.
(3)
In event of fire or explosion, either the fusible
nut on the emergency valve operator A, or the fuse plates
at the emergency valve, will melt, releasing the emergency
valve and automatically stopping fuel flow (fig. 2-17).
g.
Loading Precheck (All Models).
WARNING
When filling tank by means of bottom loading,
defueling (M970 and M970A1 ), or self-load-
ing, a test of the precheck system is manda-
tory. If this system is not functioning, stop all
operations. Determine the problem and have
it corrected by a qualified technician. Failure
of automatic shut-off to function may result in
uncontrolled fuel spillage and danger of fire
and explosion.
(1)
Shortly after fuel flow has begun, open
precheck valve D (figs. 2-18 and 2-19) to precheck the
automatic shut-off. Opening valve D sends fuel to a float
valve inside the tank to simulate “full tank” condition.
(2)
If float is functional, flow should start after
about 20-25 seconds.
(3)
Close valve D. Flow will resume in about
20 seconds.
(4)
During normal loading through bottom of
tank, the shut-off system will stop the incoming flow
automatically when fuel reaches the level of the float
valve.
2-17
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