Abstract: A valve for regulating the braking pressure applied to a wheel has a braking fluid inlet and a braking fluid outlet. A fluid passageway through the valve provides communication between the inlet and outlet. A first piston assembly is adapted to close the passageway upon the occurrence of a skid or an impending skid situation at the wheel. The first piston is also adapted to reopen the passageway upon removal of the skid or impending skid situation. A second piston assembly is adapted to partially restrict passage of fluid through the passageway upon the reopening of the passageway by the first piston assembly after the skid or an impending skid situation.

Abstract: A wheel speed sensor is adapted to be mounted entirely within the bored end of an axle. The sensor comprises a rotor, stator, permanent magnet and coil, all compactly mounted in a hermetically sealed housing. A retainer is provided within the axle bore for securing the sensor against rotational and axial movement relative to the bore. The rotor shaft which is mounted within the housing is provided with an extension which passes in sealed relationship through the housing and beyond the end of the axle. A connector arm is attached to the rotor shaft extension for engagement with the wheel hub cap.