Abstract: A bushing assembly pivotally connects the beams of an auxiliary lift axle/suspension system to a hanger and to an axle seat. The bushing assembly includes a pair of bushings, a metal sleeve, a pin with a threaded end, a pair of washers, and a threaded nut. The pair of bushings are disposed into an opening formed near an end of the beam. Each one of the pair of bushings includes a cylindrical wall comprising an inner end, an outer end, a central opening extending from the inner end to the outer end, an exterior surface, an interior surface, and a flange. The interior surface of the bushings includes at least one groove formed therein for preventing lubricant from escaping the bushing assembly during operation of the lift axle/suspension system while a sealing feature prevents contaminants from migrating into the bushing assembly.

Abstract: A bushing assembly pivotally connects the beams of an auxiliary lift axle/suspension system to a hanger and to an axle seat. The bushing assembly includes a pair of bushings, a metal sleeve, a pin with a threaded end, a pair of washers, and a threaded nut. The pair of bushings are disposed into an opening formed near an end of the beam. Each one of the pair of bushings includes a cylindrical wall comprising an inner end, an outer end, a central opening extending from the inner end to the outer end, an exterior surface, an interior surface, and a flange. The interior surface of the bushings includes at least one groove formed therein for preventing lubricant from escaping the bushing assembly during operation of the lift axle/suspension system while a sealing feature prevents contaminants from migrating into the bushing assembly.

Abstract: A steering lock mechanism for a steerable axle/suspension system includes a pair of independent tie rods, each one connected to a respective one of a pair of pivoting ends of a steerable axle/suspension system and also connected to a steering bracket that is pivotally connected to the axle of the steerable axle/suspension system. A primary lock assembly, which includes an air spring, and a secondary lock assembly are operatively connected to the steering bracket and to the steerable axle/suspension system. When the air spring of the primary lock assembly is inflated with air or when the secondary lock assembly is activated, the steering bracket is prevented from pivoting and in turn the first and second tie rods are prevented from moving transversely, so that the steerable axle/suspension system is locked into a generally straight travel position during operation of the vehicle.