Product Overview This hydraulic swing motor assembly is the core rotating drive component of the excavator, compatible with the E312B, 311B, 315B, and 317B models. It delivers torque for upper structure rotation and integrates the hydraulic motor with the reduction gear into a single unit. Manufactured with precision machining, it offers stable rotating output and reliable sealing performance, making it well suited for equipment overhaul and replacement. Part number: 119-5406