A self-propelled road milling machine is equipped with a cooling system
comprising a fan for drawing in air, a cooler, and a suction channel. The
suction channel has a vent opening facing the cooler and an intake
opening. In relation to the longitudinal axis of the road milling
machine, the intake opening points to the side of the road milling
machine, so that air is drawn in from the side. This results in
significantly less dirt being sucked into the machine than when the
suction channel is positioned in the direction of travel. In a preferred
embodiment, the suction channel is formed in one piece with a liquid tank
of the road milling machine. The liquid tank and suction system therefore
form a modular unit, which can be easily installed on the chassis of the
road milling machine.