Abstract: A control system for a pair of hydraulic lift actuators for adjusting the position of a blade-carrying frame of a motor grader includes a pair of control levers respectively operatively connected to a pair of direction control valves which are, in turn, respectively connected to the pair of actuators and selectively operable by means of the levers to place the actuators in neutral, extension, retraction, and float conditions. Each of the levers includes a hollow handle section having an electric switch mounted therein and a finger-operable sleeve is reciprocably mounted on the handle section for selectively closing the switch. Each switch is connected to an electrically responsive portion of a respective one of the control valves and when closed causes the valve to shift to effect the float condition in an associated one of the actuators.

Abstract: A motor grader includes front and rear frame sections connected together for relative pivotal movement about a vertical axis located between a cab mounted on the front frame section and an engine enclosure mounted on the rear frame section. The cab is provided at its opposite sides with fore-and-aft slidable doors supported for movement to respective open positions wherein they are disposed in outwardly angled relationship to the cab and extend rearwardly beyond the cab. The angled disposition of the doors is such that when the front frame section is in a fully angled position in the direction of one of the doors the rear end of the latter will be located between the engine enclosure and front wheel of one of a pair of bogie wheel assemblies supporting the rear frame section.