Cleaning. - TM-55-1930-208-240130

TM 55-1930-208-24

b. Cleaning.

(1) Clean oil side of core as follows:

(a) Drain any oil remaining in oil cooler core.

WARNING

Do not breathe cleaning solvent P-D-680 vapors for long periods of time or use solvent near

open flames. To avoid illness, explosion, or fire, only use solvent in well-ventilated areas away

from open flames.

(b) Force cleaning solvent (item 4, Appendix C) through the passages to remove carbon and

sludge build-up.

NOTE

If the core is exceptionally dirty, consider "hot tanking" the core.

(2) Clean the coolant side of the core as follows:

NOTE

Do not attempt to clean an oil cooler core when an engine failure occurs in which metal particles

from worn or broken parts are released into the lubricating oil. Replace the core.

WARNING

The sodium hydroxide will cause severe burns if it comes in contact with your skin. Wear eye

protection, rubber gloves, and a rubber apron. Use extreme care as not to splash the solution. If

the solution does come in contact with your skin or clothing, neutralize the solution immediately

with baking soda. Seek prompt medical attention.

(a) Carefully immerse the oil cooler core into the solution and allow the core to remain in the

solution until the bubbling and foaming stops (normally, thirty to sixty seconds).

(b) Remove the core and flush thoroughly with clean, hot water under pressure.

WARNING

Use the recommended air pressure (under 35 psi line pressure) when using compressed air to

clean components. Too much air pressure can rupture or in some way damage a component

and create a hazardous situation that can lead to a personal injury.

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