Abstract: An air pre-cleaner without moving parts including a housing having an inlet end for entrant air, an outlet end and a receiving chamber in between, wherein a feeder screw centrifuges the entrant air and moves it into a settling chamber where the dirt particles settle while the lighter air mass is directed to the outlet.

Abstract: An air cleaner assembly for use with an internal combustion engine. A housing is provided having an inlet for receiving dirty air, a clean air outlet, and a dust port for discharging dust which has been separated from the air. A plenum chamber has an inlet for receiving clean air from the housing outlet, an outlet adapted to be connected to the intake of an internal combustion engine and fastening means for securing the plenum chamber in a fixed position relative to the engine. The housing and plenum chamber are detachably interconnected so that only a minimum outward displacement of the housing away from the plenum chamber is required for removal of the housing for inspection and servicing.