OPERATOR/CREW PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

TM 5-2420-224-10

WARNING

Dry-cleaning solvent (P-D-680) is toxic and flammable. Wear protective goggles

and gloves and use only in well-ventilated area. Avoid contact with skin, eyes,

and clothes; do not breathe vapors. Do not use near open flame or excessive

heat. If you become dizzy while using dry-cleaning solvent, get fresh air

immediately and get medical aid. If contact with skin or clothing is made, flush

with water. If contact with eyes is made, wash your eyes with water and get

medical aid immediately. Failure to follow these instructions could result in

severe personal injury.

(1) Keep it clean: Dirt, grease, oil, and debris only get in the way and may cover up a serious problem. Clean as

you work and as needed. Use dry-cleaning solvent (P-D-680) to clean metal surfaces. Use soap and water

when you clean rubber or plastic material.

(2) Bolts, nuts, and screws: Check that they are not loose,

missing, bent, or broken. You cannot try them with a tool,

of course, but look for chipped paint, bare metal, or rust

around bolt heads. Tighten any 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 unit maintenance.

(4) Electrical 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. A stain around a fitting or connector can mean a

leak. If a leak comes from a loose fitting or connector,

tighten it. If something is broken or worn out, either

correct it or report it to unit maintenance.

(6) Data plates and decals: Check that they are not missing

and are legible.

(7) Damage is defined as: Any condition that affects safety or

would render the vehicle unserviceable for mission

requirements.

l. 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. When in doubt, notify your supervisor.