Description Fleetguard AF4180 is a rectangular plastic panel cabin air filter element for Caterpillar off‑highway equipment and selected Chrysler/Ram truck applications. It uses fine filter media to clean cab intake air and protect HVAC components. Direct replacement for OE Caterpillar 1070266 and 1752841 and Cummins 3097074, and cross‑references Donaldson P536429/P633721, Baldwin PA3763/PA3823/PA4074, Luber-Finer AF7878, and WIX 24094/46293.