Rear crawler track retrofit for garden and lawn tractors

In combination with a tractor of the type including steerable front wheels and a solid transverse rear axle housing journalling opposite side rear driving wheels from opposite ends thereof, a crawler track assembly for said tractor including an elongated mounting arm extending longitudinally of said tractor rearwardly of said housing and including a front end securely anchored and braced relative to said housing and against angular displacement relative thereto, said mounting arm including a rear end disposed and facing rearwardly of said housing, laterally spaced opposite side rear idle wheels disposed in front-to-rear alignment with and spaced rearwardly of said driving wheels, journal means journalling said idle wheels from said rear end about axes located at permanent elevations relative to said housing to position the lower peripheral portions of said idle wheels at elevations visually ascertainable as spaced above a horizontal plane containing the lower peripheral portions of said front and driving wheels, and opposite side endless track assemblies trained about corresponding drive and idle wheels and including guide structures spaced therealong guidingly engaged with the outer peripheral portions of said driving and idle wheels for maintaining said track assemblies trained thereabout.