High vehicle driver mount and dismount lift

In combination with a tractor vehicle of the cab over engine type wherein the driver entrance and exit opening is disposed above a front wheel of the vehicle and said vehicle includes a stationary step generally centered above said wheel spaced at considerable height above the ground surface upon which the front wheel of the vehicle rests, and wherein the vehicle includes an elongated longitudinally extending side main frame member disposed at an elevation above and below a comfortable step up from the ground and a comfortable step up to the stationary step, a vertically elongated mount supported from said main frame member closely behind and inwardly of said front wheel and including upper and lower end portions projecting above and below said main frame member, an elongated support arm having a first end portion pivotally supported from the lower end portion of said mount for angular displacement about a horizontal axis extending transversely of said arm and in a front-to-rear direction relative to said vehicle, said arm being swingable between a lowered downwardly and outwardly inclined position with the second end portion of said arm projecting downwardly and outwardly from said mount lower end portion behind and slightly outwardly of the outer side of said wheel and a raised position with said second end portion of said arm inclined upwardly and outwardly from said mount to a level above said main frame member and generally horizontally aligned with the upper periphery of said wheel and spaced slightly below and rearward of said stationary step, and an extendible and retractable fluid cylinder having one end pivotally attached to the upper end portion of said mount and the other end pivotally anchored to said arm intermediate its first and second end portions and operative, upon extension and retraction, to swing said arm between said lowered and raised positions, respectively, the outer second end portion of said arm supporting an upwardly facing step member therefrom.