Patent ID: 6837920

Claim:
A method of servicing an air cleaner; the method comprising steps of: (a) removing a removable service cover from an air cleaner housing to expose an open end and a first serviceable filter element; (i) the first serviceable filter element comprising: (A) an extension of media having first and second ends, surrounding an open filter interior, extending between first and second end caps; (1) the first end cap having a central air flow aperture therein in fluid flow communication with the open filter interior; (2) the second end cap being a closed end cap having no aperture therethough and comprising: (I) a closed recess projecting into the open filter interior from the second end of the media; (ii) the first serviceable filter being positioned with the closed end cap directed toward the open end provided by the step of removing the removable service cover; (b) removing the first serviceable filter element from the air cleaner housing by drawing the serviceable filter element outwardly from the housing, by passage through the open end provided by the step of removing the service cover; (c) positioning a second serviceable filter element within the air cleaner housing, by passage through the open end; (i) the second serviceable filter element comprising: (A) an extension of media having first and second ends, surrounding an open filter interior, extending between first and second end caps; (1) the first end cap having a central air flow aperture therein in fluid flow communication with the open filter interior; (2) the second end cap being a closed end cap having no aperture therethough and comprising: (I) a closed recess projecting into the open filter interior from the second end of the media; (ii) the step of positioning including positioning the second serviceable filter element within the housing with the closed end cap directed toward the open end; and (d) mounting the service cover with: (i) a non-circular projection on the service cover projecting into the closed recess in the second end cap of the second serviceable filter element.