A wheeled loading machine includes a body mounting a loading arm, a ground engaging structure including a front axle which carries a front pair of ground engaging wheels and a rear axle which carries a rear pair of ground engaging wheels, the loading arm being mounted at a position towards a rear of the machine for up and down movement about a generally horizontal axis, and the loading arm extending forwardly beside a cab which is mounted at one side of the body, to an outermost end which is beyond a front of the body, and the loading arm having at its outermost end a mounting for a loading implement and the arm being extendible to vary the length of the loading arm, and each axle being suspended from the body by a respective suspension, each of the ground engaging wheels being drivable by an engine of the machine through a mechanical transmission, and the machine including a braking system for braking each wheel, the braking system including a brake control system which provides a brake anti-locking function to resist any braked ground engaging wheel skidding relative to the ground as a result of becoming locked during braking when a low friction condition exists between the wheel and the ground.