Product Overview This swing reduction gearbox, available under part numbers 582-8286 , 595-9502 , 607-5642 , and 595-9505 , is the swing transmission unit specially designed for the swing system of E374 and E395GC excavators. It reduces the output speed of the swing motor and increases torque to drive the upper structure to rotate. The unit adopts a planetary gear structure with wear-resistant alloy gears and precision machining. It is designed for direct replacement