TM 9-6115-650-14&P
b. Leakage Definitions. It is necessary for you to know how fluid leakage affects the status of your equipment.
The following are definitions of the types/classes of leakage you need to know to be able to determine the status
of your equipment. Learn and be familiar with them. When in doubt, NOTIFY YOUR SUPERVISOR!
Leakage Definitions:
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 checked/inspected.
Class Ill
Leakage of fluid great enough to form drops that fall from the item being
checked/inspected.
CAUTION
Equipment operation is allowable with minor leakage (Class I or II) of any fluid except
fuel. Of course, consideration must be given to the fluid capacity in the item being
checked/inspected. When in doubt, notify your supervisor.
When operating with Class I or II leaks, continue to check fluid level more often than
required in the PMCS. Parts without fluid will stop working and/or cause equipment
damage.
Class Ill leaks should be reported to your supervisor or unit maintenance.
NOTE
If the equipment must be kept in continuous operation, check and service only those
items that can be checked and serviced without disturbing operation. Make the complete
checks and services when the equipment can be shut down.
Within designated interval, these checks are to be performed in the order listed.
3-4
