TM 5-3805-281-24-1
Operational Checkout Procedure
10 FUEL SYSTEM CHECKS
9005
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10
42
FUEL TANK INTERIOR
IMPORTANT: Be careful not to damage fuel gauge sender float or low fuel level
YES: Drain fuel, dispose
CHECK
sending unit.
of contaminated fuel
properly. Remove debris,
clean bottom of tank.
Remove fuel cap.
Replace fuel filters.
Check water separator.
Use a flashlight to inspect bottom of fuel tank by shining light through the fuel.
NO: Go to next check.
Is dirt, debris, or contamination seen in tank?
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FUEL TANK SUMP
A--Fuel Tank Drain Valve
YES: Drain until clear fuel
CHECK
flows or drain all fuel from
Hold a clean container under fuel tank drain valve (A).
tank, dispose of
contaminated fuel
properly. Replace final
Remove recessed hex plug.
fuel filter, check primary
fuel filter (water
Open drain valve for a few seconds and catch fuel in
separator).
container.
T7700AA
UN18FEB92
NO: Go to next check.
Check condition of fuel in container.
Is water present or is fuel cloudy?
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PRIMARY FUEL FILTER
Inspect fuel in water separator.
YES: Replace water
(WATER SEPARATOR)
separator filter element.
CHECK
Is water or other contamination present?
NO: Go to next check.
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