CLEANING -624880199

TM 5-2420-222-20-1

CLEANING

All parts must be cleaned before inspection, assembly and after repair. If part is to be removed, wipe off grease and grime

before removal so particles will not fall into engine or hydraulic components.

WARNING

Avoid contact with live steam. Live steam can burn skin, cause blindness, and cause other serious injury.

Be sure to wear protective apron, gloves, and safety goggles when using live steam.

When working on systems where cleanliness is required, steam clean parts and surrounding area before removal or

disassembly. Hands should be kept clean and free of grease.

WARNING

Drycleaning solvent P-D-680 is toxic and flammable. Wear protective goggles and gloves and use only in

a well ventilated area. Avoid contact with skin, eyes, and clothes and don't breathe vapors. Do not use

near open flame or excessive heat. The flash point is 100F to 138F (380C to 590C). If you become dizzy

while using cleaning solvent, get fresh air Immediately and get medical aid. If contact with eyes is made,

wash your eyes with water and get medical aid immediately.

Clean inner and outer surfaces of metal parts and all areas that get greasy or oily with drycleaning solvent (item 28,

Appendix C). Clean out sludge and gum with stiff brush. Put small parts in wire mesh basket before immersing in solvent.

Use steam cleaning to take off grease and dirt build-up. After drycleaning solvent has been applied, dry with clean rags

(item 21, Appendix C).

WARNING

Compressed air used for blowing away chips, dirt, etc., must leave nozzle at less than 30 psi (207 kPa) to

prevent personal injury. Be certain that nozzle is rated to provide a maximum of 30 psi (207 kPa). Be sure

to wear safety goggles or lenses when using compressed air. Compressed air and particles moved by

compressed air can cause damage to your eyes.

Use clean water or detergent (item 7, Appendix C) to clean rubber or plastic material. Clean off rust with wire brush or

crocus cloth (item 6, Appendix C). Use low pressure compressed air to blow away rust and cloth particles. Clean off solder

with soldering iron. Hydraulic system components must be cleaned and dried carefully so that foreign particles cannot get

into hydraulic fluid and contaminate it.

WARNING

Electrical parts solvent cleaning compound (trichlorotrifluoroethane) is flammable, and reacts violently with

aluminum, titanium, barium, lithium, samarium, and sodium potassium. Cleaning compound fumes

displace air and it may be carcinogenic. Boiling point is 114F (460C). Do not wear jewelry. Wear rubber

gloves and use only in well ventilated area. Avoid contact with skin, eyes, and clothes and do not breathe

vapors. Do not use near open flame or excessive heat. If you become dizzy while using cleaning

compound, get fresh air immediately and get medical aid. If contact with eyes is made, wash your eyes

with water and get medical aid immediately.

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