Filter assembly, related filter elements and housing cover

A filter element for use in an air cleaner assembly, the filter element comprising:

• a) a media pack extending between a closed first end cap at a first end and a second end cap at a second end;
• b) a support structure centrally positioned on the first end cap and protruding inwardly in a longitudinal direction towards the second end cap;
• and
• c) a guiding structure radially extending from a longitudinal sidewall of said support structure.

An air cleaner assembly comprising:

• a) a filter housing assembly defining an inlet and an outlet;
• b) a primary filter element disposed within the housing and along a fluid flow path between the housing inlet and outlet, the primary filter element including a first media pack;
• c) a secondary filter element coaxially arranged with the primary filter element within the housing and along the fluid flow path, the secondary filter element including a second media pack;
• and
• d) a positioning arrangement including a first part associated with the primary filter element and a second part associated with the secondary filter element, wherein the first part interacts with the second part such that, during installation of the primary filter element, a pushing force on the primary filter element in a direction towards said secondary element is converted into a rotational movement of the primary filter element up until a first predetermined angular position, followed by a translational movement of the primary filter element towards said secondary filter element in a direction along an axis when the first predetermined angular position is reached.