Patent ID: 7785423

Claim:
A method for removing debris from and washing the propulsion means of a vehicle, such propulsion means comprising wheels, tracks or treads that contact and move the vehicle over the ground, comprising: providing an elongated tank having spaced, opposed side walls, a bottom and end walls, each of said end walls being movable between open positions in which said vehicle can access or exit said tank and closed positions in which said tank is substantially sealed with said vehicle maintained within said tank, opening one of said end walls, moving said vehicle into said tank past said one open end wall to a position in which said vehicle propulsion means rests on said tank bottom and said vehicle is supported solely by said tank bottom, closing said one end wall, lifting said vehicle in said tank to a position in which the entirety of said propulsion means is out of contact with said tank bottom, washing said propulsion means while said vehicle is in said raised position, lowering said vehicle until said propulsion means is in contact with said tank bottom, and propelling said vehicle from said tank.