2-8. CLEANING AGENTS.
a. Keeping the semitrailer clean is an important part of proper PMCS. Equipment that is
covered with surface dirt, grease, and oil cannot be properly inspected, nor will it operate as well as it
b. Keep excess lubricants away from exterior parts that do not require lubrication.
Use only those authorized cleaning solvents or agents listed in Appendix E.
2-9. LEAKAGE DEFINITIONS.
a. It is important to know how fluid leakage affects the status of the semitrailer. Following are
types/classes of leakage an operator must know to determine whether the semitrailer is mission
capable. Learn these leakage definitions. When in doubt, notify unit maintenance.
CLASS I - Seepage of fluid (as indicated by wetness or discoloration) not great
enough to form drops.
CLASS II - Leakage of fluid great enough to form drops, but not enough to cause
drops to drip from item being inspected.
CLASS Ill - Leakage of fluid great enough to form drops that fall from item being
b. A very important exception to leakage rules is leakage of fuel from semitrailer tank, piping
assembly, or precheck and jet level sensor tubing. NO FUEL LEAKAGE IS PERMITTED.
c. Equipment operation is allowed with minor (Class I or II) leakage. Of course, fluid levels in an
item/system affected with such leakage must be checked more frequently than required in PMCS.
When in doubt, notify unit maintenance.
d. Class Ill leaks must be reported IMMEDIATELY to unit maintenance.