Abstract: A mounting frame for a moldboard of a motor grader is provided with first and second retainers having V-shaped notches that cooperate with V-shaped engagement portion located on the mounting rails of the moldboard. Each of the V-shaped notches are provided with first and second wear strips defining the wings of the V-shaped notch. The wear strips have a sliding surface in sliding contact with the mounting rails and a contact surface which contacts the adjoining wear strip in the V-shaped notch. Locating protuberances are located at each end of the wear strips and cooperate with retainer clips to hold the wear strips in proper position. The ends of the wear strips are also provided with abutment surfaces which contact the base of the retainer clips.

Abstract: A main frame construction for a motor grader wherein the main frame comprises a rear unit, a center unit, and a front unit. Both rear and center units are box-like structures in cross sections with constant transverse dimensions, with constant metal specification, with continuous welds at all four corners running longitudinally of each unit, with but one weld junction at a location spaced rearwardly of the knee area supporting a saddle structure for the blade, and without the provision of extra structural members and arrangements at the knee area. Minimum section changes within the box structures of the rear and center units, the elimination of weld starts and stops provides a strong smooth section of main frame alleviating locally high stresses at the knee area for mounting the saddle. The very simplicity of the rear and center unit box-structure as described and depicted is the heart of the improved main frame.

Abstract: A saddle construction for use in a motor grader having a fore-and-aft extending main frame comprising an upper portion having a generally longitudinal extending section forming a forward facing and a rear facing. The facings have a generally vertical orientation. The main frame has first and second pins slidably mounted transversely in the main frame in longitudinal spaced apart relationship. The forward facing of the saddle upper portion straddles the main frame and is fixably mounted to opposite ends of the first pin. In like manner, the rear facing straddles the main frame and is fixably mounted to opposite ends of the second pin. The saddle further includes a lower portion straddling the main frame and fixably mounted the rear facing. The main frame has a plurality of recesses formed in respective side walls of the main frame in longitudinal spaced apart relationship for seatably receiving inwardly directed landings formed on the facings.