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 TM 55-1905-219-14-5
3-81.
AIR CLEANER.
a. The air cleaner is designed to remove foreign matter from the air, pass the required volume of air for
proper combustion and maintain their efficiency for a reasonable period of time before requiring service.
b. The importance of keeping dirt and grit laden air out of an engine cannot be overemphasized since
clean air is so essential to satisfactory engine operation and long engine life. The air cleaner must be able to
remove fine materials such as dust as well as coarse materials as lint from the air. It must also have a
reservoir capacity large enough to retain the material separated from the air to permit operation for a
reasonable period before cleaning and servicing are required.
c. The light duty, oil bath type air cleaner, consists essentially of a wire screen element supported inside a
cylindrical housing which contains an oil bath directly below the element. Air drawn through the cleaner passes
over the top of the oil bath. The air stream direction reverses when the air impinges on the oil in the sump and
is then directed upwards by baffles. During this change in the direction of air flow, much of the foreign matter is
trapped by the oil and is carried to the sump where it settles out. The air passes upward through the metal-wool
elements where more dust and the entrained oil are removed. A second change of air direction at the top of
the cleaner directs the air downward through the center tube and into the blower inlet housing.
3-1407
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