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Page Title:
ENGINE STARTS BUT IDLES ROUGHLY - continued |
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 TM 10-3930-673-20-1
CONTAMINATED FUEL
FUEL/WATER
S
VISUAL INSPECTION
EPARATOR
(1) Check for contaminated fuel by
operating engine with known clean fuel
from temporary supply tank.
(a) Disconnect fuel line at fuel/water
separator, where line leads to fuel
transfer pump.
(b) Place disconnected end of fuel line
T
LINE TO FUEL
in temp tank of known clean fuel.
(c) Start engine and run it for
RANSFER PUMP
approximately 5 minutes to
determine if engine performance
improves with known clean fuel.
(2) If fuel in fuel tank proves clean, go to
Step 5 of this fault.
(3) If fuel in fuel tank is contaminated, shut
down engine (TM 10-3930-673-10),
drain and flush tank, and replace fuel
with clean fuel
(Para 5-9).
FUEL FLOW THROUGH FILTER
VISUAL INSPECTION
(1) Loosen hose fitting at top of secondary
filter element (Para 5-15).
(2) Crank engine for thirty seconds.
(a) If fuel flows freely from fitting,
transfer pump and fuel filter OK.
TR01193
(b) If fuel does not flow freely, replace
transfer pump (Para 5-3) and/or
filter elements (Para 5-15).
TRP NSFER
A
LINES O FUEL/WATER
T
UMP
EPARATOR
2-639
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