Subclass 1/267: Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading (vehicles for carrying harvested crops with means for self-loading or self-unloading A01D 90/00; peculiar to refuse-collecting-vehicles B65F; loading or unloading vehicles by means not incorporated therein B65G) with a tipping movement of load supporting or containing element (dredges or soil-shifting machines E02F 3/00) Means for controlling movement of tailboards or sideboards Controlling degree of tailboard or sideboard movement in dependence upon degree of tipping movement, e.g. by linkage or cam