Abstract: A spray device having a plurality of rotating nozzles directing sprays of a high pressure fluid in a circular pattern against an object being cleaned. The nozzles are mounted on the ends of supply pipes extending radially outwardly from a hub connected to a hollow crankshaft. The crankshaft is connected to a source of high pressure fluid through a supply conduit which is connected to the crankshaft by a rotary union. The rod of a double action piston is connected to the crankshaft and rotates the crankshaft and nozzles upon linear reciprocating movement of the piston rod. The piston cylinder is pivotally mounted on a valve block which has a pair of ball check valves which are actuated by a rocker bar mounted on the cylinder. A small quantity of the high pressure fluid is directed into the valve block from a manifold and is injected alternatively into the ports of the cylinder upon pivotal movement of the cylinder to reciprocate the rod and rotate the crankshaft and connected spray nozzles.