Abstract: An apparatus for a vehicle, especially a truck, incorporating at least one hydraulic lift mechanism for tilting a receptacle, typically a container, and for loading and unloading the receptacle by a rolling action by means of a pivotal hook arm which can be extended and retracted. A hydraulic auxiliary lift mechanism acts upon the hook arm and the receptacle through the agency of a pivotal auxiliary support both at the start of the tilting movement as well as also at the start of the unloading movement and assists both the start of the tilting movement and also the start of the unloading movement.