Abstract: A component unit for excavating, compacting and loading material on a horizontal or sloping surface. A carrier beam pivotal in the horizontal and vertical plane carries via a plurality of elastic members an excavating blade and further an amplitude limiter between said beam and said blade. The amplitude limiter comprises a sliding body carried by said blade and provided with a top sliding surface and a side sliding surface having an angle of preferably 135.degree. to the top sliding surface. The carrier beam carries partly a top block above and adjustable in relation to the top sliding surface partly a stop member portion along and on a small distance from the side sliding surface.