Machines built for heavy-duty work like construction equipment, and farm and mine tractors pack so much power that they need a different type of braking system to grind to a halt. Also, these vehicles work under extreme conditions from the environment and weather.

To slow down and stop such vehicles, engineers developed and almost perfected over the years the oil-immersed or wet brake system, which is complex more durable than the dry brakes found in road-going vehicles.