LEAKAGE DEFINITIONS FOR UNIT PMCS - TM-10-3930-673-20-10042

TM 10-3930-673-20-1

2-7. ORGANIZATIONAL PREVENTIVE MAINTENANCE CHECKS AND SERVICES

(CONT)

(2) Bolts, nuts and screws: Check that they are not loose, missing, bent or broken. You can't try them all with a tool, of

course, but look for chipped paint, bare metal or rust around bolt heads. Tighten any bolt, nut, or screw that you find loose.

(3) Welds: Look for loose or chipped paint, rust, or gaps where parts are welded together. If you find a bad weld, report

it to Direct Support.

(4) Electric wires and connectors: Look for cracked or broken insulation, bare wires and loose or broken connectors.

Tighten loose connections and make sure wires are in good condition.

(5) Hoses and fluid lines: Look for wear, damage and leaks. Make sure clamps and fittings are tight. Wet spots show

leaks, or course, but a stain around a fitting or connector can mean a leak. If a leak comes from a loose fitting or connector,

tighten the fitting or connector. If something is broken or worn out, either correct it or report it to Direct Support Maintenance

(see Maintenance Allocation Chart, Appendix B).

2-8. LEAKAGE DEFINITIONS FOR UNIT PMCS

It is necessary for you to know how fluid leaks affect 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 and

REMEMBER - When in doubt, notify your supervisor.

LEAKAGE DEFINITIONS FOR UNIT 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 the item being

checked/inspected.

Class III

Leakage of fluid great enough to form drops that fall from the item being checked/inspected.

CAUTION

Equipment operation is allowable with minor leakages (Class I or II). Of course, consideration must be

given to the fluid capacity in the item/system being checked/inspected. When operating with Class I or

II leaks, continue to check fluid levels as required on your PMCS.

NOTE

Change the interval if your lubricants/elements are contaminated or if you are operating the equipment

under adverse operating conditions, including longer-than-usual operating hours.

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