Abstract: A main frame for a track-type loader vehicle including a pair of implement supporting towers attached to horizontal rails of box construction which support pivot shafts of track roller frames and final drives of a hydrostatic drive system. Each tower includes two upright members with one member of A-frame construction having three legs of box construction arranged in a triangular shape and a wall common to all of the legs. One leg is located on one side of the wall, another leg is located at an edge of the wall adjacent the horizontal rail, and the third leg is on the other side of the wall. The two upright members support a lift arm for a loader bucket and a cylinder for lifting the lift arm, while the one upright member also carries an equalizer bar support.

Abstract: A cross support assembly is provided which is useful, for example, in earthworking equipment. Such an assembly can be mounted to extend between two lateral supports. A bracket extends laterally from the assembly and can serve as a supportive pivot for a bucket or the like. The assembly is generally hollow and acts as a torsion member. A bulkhead is welded in the cross support assembly and is positioned to directly receive forces exerted on the bracket. Usually the bracket and bulkhead are of unitary construction. The bulkhead extends within a generally tubular cross-member which also forms a part of the assembly and is attached between the lateral supports and into contact with the interior of the tubular member. Forces exerted on the assembly are thus generally compressively applied to the bulkhead welds adding to the overall strength of the assembly.