the frame also includes a front elevated portion 12 34 which includes a conventional hitch not shown such as a fifth wheel king pin hitch for attachment to a fifth wheel or the like on a truck tractor not shown mounted on frame 12 is an elongated front to rear semicylindrical stump support trough 20 extending in the axial direction of the trailer this trough has an open top for receiving stumps large chunks of tree trunks or the like placed there as by a crane 24 which can be mounted directly on the frame 12 of the disintegrator as depicted or can be separate therefrom this crane typically will include clamping arms 26 operated as by hydraulic cylinders 28 or the like suspended on a cantilever beam 30 which preferably is capable of movement in three dimensions about a swivel 32 at the top of an upright support 34 at the front portion of rear frame portion 12 39 is a chipper assembly 40 operated by a drive assembly 42 to be described at the rear of frame portion 12 39 forwardly of crane support 34 is a ram assembly 44 this ram assembly includes a ram plate 46 shown to be.