SITES oleodynamic tilters have a basic frame made of section iron electrically welded into a rigid, indeformable structure. The tilting platform is made of thick sheet suitably reinforced and pivoted onto the main frame. The mechanical parts are made of special quality steel and they have been particularly chosen for the various types of stress they are subjected to. All rotating parts slide on self-lubricating bearings or bushes. The tilting components are composed of jacks