Abstract: A walking beam is located under each of the main longitudinal members of the vehicle frame and carries at each of its ends a wheel spindle journaling a wheel for ground engagement. A shock absorbing resilient member is carried between upper and lower supports connected respectively to each main longitudinal member and walking beam. A pivot member is mounted to the walking beam below the lower resilient member support and serves to define the pivot axis for each walking beam. Each pivot member is connected to the vehicle frame by a transverse pivot shaft and is braced by a longitudinally extending strut.

Abstract: Self-orientation apparatus for a vehicle having a dual wheel axle assembly wherein the rear axle is movable relative to the vehicle frame about a pivot axis centrally disposed in front of the rear axis. A pair of low-friction skids between the axle and each rear spring allow relative movement therebetween, and first and second pairs of converging arms extend from the base of the springs and the axle, respectively, and converge at said pivot axis where the two pairs of arms are joined by a trunnion.