Abstract: The invention provides a suspension system (10) for installation between a chassis having side rail members (14,16) and cross frame members (22,24,26) and an axle (18,20) of a vehicle. A step spring (36) is included having a forward generally horizontal section (38), a rearward generally horizontal section (42), and a generally vertical section (40) between and contiguous with the forward and rearward sections (38,42) and displacing the rearward section (42) below the forward section (38). The leading end of step spring (36) is pivotally attached to the chassis with a spring (68) extending between the chassis and the trailing end of step spring (36). Axle (18,20) is pivotally secured to a mounting (58,60) on forward generally horizontal section (38) with the pivot (56) above axle (18,20).

Abstract: Suspension adjustment for a suspension for a vehicle having a chassis frame and at least one pair of opposed transport wheels on opposite sides of the fore-and-aft axis of the vehicle, an axle extending between the wheels of each pair, the suspension including a pair of spring hangers attached to each opposite side of the chassis frame, and a leaf spring assembly on each side of the chassis frame interconnecting each pair of spring hangers with opposite ends of the axle in resilient load transfer relationship, each leaf spring assembly having a leaf spring with a spring eye at one end and a spring pin extending through the spring eye and through an aperture in an aperture providing formation rigidly secured to the one of the spring hangers to which the end of the leaf with the spring eye is interconnected, and mechanism for adjusting the fore-and-aft position of at least one end of an axle, the axle end adjusting mechanism comprising a first fastener adjustably fastening a spring hanger associated with an adj

Abstract: A tandem axle suspension wherein alignment of one axle relative to the other may be adjusted. The suspension includes a pair of spring hangers attached to each side of the chassis frame and a leaf spring assembly interconnecting each pair of spring hangers. Each leaf spring assembly includes a leaf with a spring eye at one end and a spring pin extending through the spring eye and through a transverse aperture in an aperture-providing insert rotatably mounted in the spring hanger to which the end of the leaf spring with the spring eye is interconnected. The spring hanger in which the insert is mounted has an upper portion by which it is attached to the vehicle chassis frame and depending portion having a transverse opening in which the insert is rotatably mounted. The depending portion is transversely bifurcated by a slot extending upwrdly into the transverse opening.