An improved material transport vehicle having an integrated assembly for cleaning out conveyors, elevators, hoppers and the like, and method for clean-out utilizing the same. The cleanout assembly comprises one or more detachable panels strategically located about the material transport vehicle, and means for releasing the same, so as to permit convenient and safe access to the components for removing unused, old or dried material. The detachable panel or panels are integral with a surface of the housings, typically the lower surface thereof.