Abstract: A material handling apparatus includes a tractor/trailer vehicle which can mount and dismount ore receiving containers, which can transport the containers between a collection site and a deposit site and which can dump ore out of a container at the deposit site. Each container defines a housing with an interior and an open rear area. A tailgate assembly includes a pair of bell crank arms pivotally secured on either side of the container and a tailgate mounted between first arm portions thereof to close the open rear area. A transport frame, preferable on the trailer section of the tractor/trailer vehicle, defines a support for a tiltable bed pivoted mounted on a rear portion of the frame. A linkage assembly is centrally mounted on each side of the tiltable bed and each linkage assembly includes a cam member driven by a pair of first hydraulic cylinders.