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 TM 55-1905-219-14-1
b. Cleaning Rust or Grease. When leaning grease buildup or rusty places, use a cleaning solvent. Then apply
a thin coat of light oil to affected area.
2-21. LEAKAGE DEFINITIONS FOR OPERATOR PMCS. It is necessary for you to know how fluid leakage affects the
status of the LCU. Following are types/classes of leakage an operator needs to know to be able to determine the status
of the LCU. Learn these leakage definitions and remember - when in doubt, notify your supervisor.
CAUTION
Equipment operation is allowable with minor leakages (Class I or II). Of course,
consideration must be given to fluid capacity in the item/system being
checked/inspected. When in doubt, notify your supervisor.
When operating with Class I or II leaks, continue to check fluid levels as
required in your PMCS.
Class III leak should be reported immediately to your supervisor
a. CLASS I - Seepage of fluid (as indicated by wetness or discoloration) not great enough to form drops.
b. CLASS II - Leakage of fluid great enough to form drop but not enough to cause drops to drip from item being
checked/inspected.
c.
CLASS III - Leakage of fluid great enough to form drops that fall from item being checked/inspected.
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