Do not use tape to close off fuel or oil openings. Sticky surface of tape can mix with fuel and oil and
cause engine malfunctions.
e. Parts Protection. To keep dust, dirt, moisture and other objects out of internal parts of systems or components,
cap or tape all open tubes, hoses, air lines, fittings and components openings as soon as part is removed. Wrap all
removed parts in clean paper or dip parts in preservation oil.
2-38. GENERAL CLEANING INSTRUCTIONS
Dry Cleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and gloves; use
only in 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 Dry
Cleaning Solvent is 100°F (38°C) and for Type II is 130°F (50°C). Failure to comply may result in
serious injury or death to personnel.
If personnel become dizzy while using Dry 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. Failure to comply may
result in injury to personnel.
Never use fuel to clean parts. Fuel is highly flammable. Serious injury could result if fuel ignites
a. Cleaning Solvents. Use only approved cleaning solvents to clean parts. Dry Cleaning Solvent P-D-680 (Item 71,
Appendix D) is commonly used. Always work in a well-ventilated area.
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). Failure
to comply may result in injury to personnel.
b. Removing Deposits. Soak parts in Dry Cleaning Solvent P-D-680 (Item 71, Appendix D), and wash away deposits
by flushing or spraying. When necessary, brush with a soft bristle brush (not wire) moistened in solvent. Use
compressed air to dry parts, except bearings, after cleaning. Bearings must drip and air dry.
c. Tools. Do not use wire brushes, abrasive wheels, or compounds to clean parts unless specifically approved in the
detailed procedures. Parts may be scratched or altered and may weaken a highly stressed part.
d. Ball and Roller Bearings. When cleaning ball or roller bearings, place them in a basket and suspend them in a
container of Dry Cleaning Solvent P-D-680 (Item 71, Appendix D). If needed, use a brush to remove caked grease,
chips, etc. Avoid rotating bearing before solid particles are removed to prevent damaging races and balls. When
bearings have been cleaned, coat them lightly with lubricating oil (Item 43, Appendix D) to remove Dry Cleaning