TM 5-3805-281-24-1
Operational Checkout Procedure
FUEL TRANSFER PUMP
YES: Go to next check.
CHECK
NO: Be certain fuel filter
is clean. If not, replace
filter. Check fuel transfer
pump.
9005
10
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T115148F
UN04MAY98
T6493AA UN19OCT88
A--Bleed Screw
Open bleed screw (A) on fuel filter.
Operate hand primer on fuel transfer pump.
Does fuel come out of bleed screw when hand primer is operated?
Tighten bleed screw and again operate hand primer.
Is resistance felt when hand primer is operated and increase as system pressure
increases?
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FUEL SYSTEM CHECK
Engine OFF.
YES: Go to next check.
Disconnect fuel return hose from leak-off line.
NO: Fuel supply is
restricted, check for
plugged fuel filters,
Connect a hose to leak-off line to route excess fuel into a container.
plugged fuel tank cap
vent, restricted lines,
Start engine and run at fast idle.
stuck injection pump
overflow valve, or a
Put engine under load by operating a hydraulic function over relief.
malfunctioning fuel
transfer pump. Repair or
Observe fuel flow from leak-off line.
replace as necessary.
Does fuel flow from leak-off line with engine at full load?
NOTE: Fuel that flows from leak-off line is excess fuel not required by the engine and
flows back to the fuel tank.
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