LEAKAGE DEFINITION

TM 9-2320-391-10

M1078A1 SERIES PREVENTIVE MAINTENANCE

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CHECKS AND SERVICES (PMCS) - Continued

LEAKAGE DEFINITION

CAUTION

Equipment operation is allowable with minor leakages (Class I or II) except

for fuel leaks. Consideration must be given to the fluid capacity of the item or

system being checked. When in doubt, ask your supervisor.

When operating with Class I or II leaks, continue to check fluid levels as

required in your PMCS.

Class III leaks must be reported to Field Maintenance. Failure to comply may

result in damage to equipment.

It is necessary to know how fluid leakage affects the status of the vehicle. The following

are definitions of the classes of leakage an operator or crewmember needs to know to be

able to determine the condition of the leak. Learn and then be familiar with them, and

REMEMBER - WHEN IN DOUBT, ASK YOUR SUPERVISOR.

Leakage Definitions for Crew/Operator PMCS

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.

CLASS III - Leakage of fluid great enough to form drops that fall from the item being

checked.

INSPECTION

Look for signs of a problem or trouble. Senses help here. You can feel, smell, hear, or see

many problems. Be alert when on the vehicle.

Inspect to see if items are in good condition. Are they correctly assembled, stowed,

secured, excessively worn, leaking, corroded, or properly lubricated? Correct any

problems found or notify Field Maintenance.

There are some common items to check all over the vehicle. These include the following:

1. Bolts, clamps, nuts, and screws: Continuously check for looseness. Look for chipped

paint, rust, or corrosion around bolt and screw heads and nuts. Tighten them when

you find them loose. If tools are not available, notify Field Maintenance.

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