PISTONS, PISTON PINS, AND RINGS REPLACEMENT - continued

TM 10-3930-673-34

3-16. PISTONS, PISTON PINS, AND RINGS REPLACEMENT (CONT)

b. Cleaning.

WARNING

Drycleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and

gloves; use only in a well-ventilated area; avoid contact with skin, eyes, and clothes;

and do not breathe vapors. Keep away from heat or flame. Never smoke when using

solvent; the flashpoint for type I drycleaning solvent is 100F (38C), type II is 138F

(59C), and type III is 200F (93.3C). Failure to do so may result in injury or death to

personnel.

If personnel become dizzy while using cleaning solvent, immediately get fresh air and

medical help. If solvent contacts skin or clothes, flush with cold water. If solvent

contacts eyes, immediately flush eyes with water and get immediate medical

attention.

Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only

with effective chip guarding and personal protective equipment (goggles/shield,

gloves, etc.).

CAUTION

Do not use bead blast to clean

pistons. Bead blasting may damage

piston.

(1)

Soak pistons (2) in dry cleaning

solvent P-D-680 to remove carbon

deposits.

(2)

Wash pistons in a strong solution of

TR01061

laundry detergent and hot water, to

remove carbon residue. Use a stiff

bristle brush.

(3)

Clean ring grooves in piston (2) using square end of a broken piston ring. Use care to

avoid scratching ring sealing surfaces in piston grooves.

(4)

Clean pistons again in solution of laundry detergent and hot water.

(5)

Rinse pistons in clean, fresh water and dry using compressed air.

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