Product Overview This swing motor assembly (part numbers 572-6216, 522-6900, and 522-6899) is the hydraulic drive unit specifically engineered for the E350GC excavator swing system. It converts hydraulic pressure into torque to drive rotation of the upper structure. Built with a high-torque piston design, precision sealing, wear-resistant alloy materials, and precision machining, it offers direct replacement installation and stable output performance for heavy-duty mining and