Abstract: A self-propelled screening apparatus (1) having a chassis (11); a pair of endless tracks (12) supporting the chassis (11); a superstructure (13) rotatably mounted on the chassis (11); a prime mover (19) provided in or on the superstructure (13) and arranged to provide motive power to operate the endless tracks (12) and where the prime mover (19) is rotatable with the superstructure (13); and a screen box (16) mounted on the superstructure (13), also for rotation therewith. The screen box (16) has an input (17) for receiving a supply of bulk material, at least one screen deck for screening the bulk material, and an output for discharging screened material. The prime mover (19) and the screen box (16) are arranged on opposite sides of the rotational axis of the superstructure (13), to provide a stable weight distribution.

Abstract: A hydraulic stone picker adapted for use in conjunction with a modified front-end loader. The fork is pivotally mounted to the side of the front-end loader which has been modified by addition thereto of a front and extended side walls to define a collecting bin. Stones dislodged by the fork are transferred to the collecting bin by actuation of a hydraulic ram which rotates the fork from a lowered to a raised position. The apparatus is provided with support members to prevent damage to the fork during use. The linkage of the fork to the hydraulic ram includes a lost-motion connection which permits the fork to pivot during use to accommodate surface irregularities.