Product Overview This travel motor assembly, identified by part numbers 199-4661 , 199-4652 , and 199-4691 , is a hydraulic drive unit purpose-built for the travel system of E385C , E390D , and 365 excavators. It converts hydraulic pressure into high torque to drive crawler movement. The unit features a high-torque piston structure, precise sealing design, wear-resistant alloy materials, and precision machining. It is designed for direct replacement installation and delivers