Abstract: A wheeled building and constructional machine of the mechanical shovel, bulldozer or the like type has an articulated steering system and comprises a vehicle chassis, a plurality of wheel axles, a hydraulic suspension system for the wheel axles, and at least one transversely stabilizing valve. The hydraulic suspension system comprises a plurality of fluid cylinders which are disposed between pivoting levers which are rotatably mounted and hold the wheel axles, and the vehicle chassis, and rotatably mounted on these vehicle parts. The fluid cylinders are adapted for action upon both of sides and are connected to the stabilizing valve or valves.