John Deere 850L WLT crawler dozer is a heavy-duty track-type tractor designed for grading, earthmoving, and site preparation in demanding construction and land-clearing applications. The WLT configuration refers to the wide long track undercarriage, which increases ground contact area for improved flotation, stability, and traction on soft or uneven terrain. The 850L platform is part of John Deere's L-Series dozers, known for integrated powertrain and hydraulic systems, precise blade control, and operator-focused controls. Common uses include road building, bulk material handling, slope work, and finish grading. The machine is typically paired with a straight, semi-U, or PAT blade.