In 1915, a young Frank Donaldson Sr., then a Bull Tractor Company salesman, visited a customer whose farm tractor kept breaking down in his dusty field. So he fashioned an air cleaner to protect the engine from the dust. The invention – the world’s first effective air cleaner for a tractor engine – worked, and Donaldson Company was born.

Since 1915, Donaldson has pioneered the development of nearly every major advancement in heavy-duty engine air filtration. On-road or off, you can trust Donaldson air filtration to withstand even the harshest environments.

Donaldson air filters are fitted with filter media specially designed to trap contaminants such as dirt, dust and soot before they cause harm to your engine and equipment. Our full line of air intake filter systems, replacement parts and accessories are available in a variety of styles, sizes and materials to meet any application.