Manure is scrapped from a barn floor including an elongated conduit by blades on a trolley moving in the direction of the elongated conduit. The manure passes into the conduit via a slot. The trolley has a paddle wheel and drive wheels bearing on the conduit interior lower surface. The entirety of the drive wheels and most of the paddle wheel are in the conduit. A sprocket and chain arrangement connects the wheels so that, as the drive wheels turn, the paddle wheel turns to urge manure into the conduit.
