TM 9-2350-256-10
(h)
Ensure radio communications equipment (18) is off.
(i)
Check all inside and outside fire extinguisher controls for broken seals.
(j)
Ensure FUEL CONTROL VALVES are properly set.
When operating vehicle under normal conditions, set fuel control valves as follows:
RIGHT REAR TANK (19)-open
FORWARD TANK (20)-closed
DRAIN (21)-closed
LEFT REAR TANK (22)-open
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