TM 55-2840-231-23
2-4. Compressor Cleaning to Restore Lost Performance - Continued
ENGINE/ - Continued
Buildup of dirt in the compressor can result in a
serious loss of engine power and performance
Lost performance may be restored by flushing the
installed engine with a water/solvent solution as
follows
Methanol is flammable; it should not be
used if the ambient temperature is
above 4°C (40°F), its vapor is harmful;
it could be fatal or cause blindness if
swallowed. Keep it away from open
flame and avoid prolonged breathing of
the vapor.
NOTE
Once the cleaning procedure is started, it
must be carried through to completion
without delay. At ambient temperatures
below 4°C (40oF) and above -29°C
(-20°F), use a 40 percent Methanol (item
47, Appendix D), 60 percent water mix-
ture in place of fresh water. The tempera-
ture of the wash solution should not be
below 4°C (40°F); ideally it should be
between 21°C-26oC (70°F-80oF). To
avoid spraying concentrated Methanol,
which is flammable, mix the solution
thoroughly.
Water soluble cleaner (item 26, Appendix D).
Prepare two to four
quarts of cleaning
Type II and Type IIA (items 55,56,
consisting of one part
57,58, Appendix D).
Cleaning compound to
four parts of clean water
disstilled if available).
Do not substitute petroleum base sol-
vent or jet fuel for recommended clean-
ing compound. Compressor plastic lin-
ing could be damaged.
Change 12
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