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TM 9-2320-364-20-2
2-988
4. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (WATER TEMP GAGE READS
OVER 180F [82C]) (CONT).
Air cleaner filter OK.
Fuel not contaminated.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Verify repair.
If engine does not exhaust black
or gray smoke, fault has been
corrected.
YES
NO
Fault corrected.
3.
Does engine exhaust black or
gray smoke?
Fault not corrected.
Notify DS
Maintenance.
2.
Service or replace
fuel/water separator
(Para 4-15 or 4-17) or
replace secondary
fuel filter (Para 4-13).
Verify repair, go to
Step 3 of this Fault.
YES
NO
Air cleaner filter OK.
Contaminated or wrong type of
fuel.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
Exhaust smoke may be black or
gray if fuel is contaminated or
wrong type.
WARNING
Is fuel in fuel/water separator
free from contamination?
Read WARNING
on Page 2-989
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