A radial conveyor (10) has a multi-mode wheel assembly located at each side of its chassis (16). Each wheel assembly (30) is movable with respect to the chassis between a non-deployed state and a deployed state. In the non-deployed state the wheel assemblies support transport of the radial conveyor. In the deployed state the wheel assemblies support radial movement of the conveyor (12). The wheel assemblies can also be raised and lowered with respect to the chassis. This allows the ground clearance of the chassis, and the overall height of the radial conveyor to be adjusted, as well as facilitating transition between operating modes.
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