Swing Motor Assembly 378-9517 488-3074 for E320GC Excavator

This hydraulic swing motor assembly is the core rotating drive component of the excavator, compatible with the E320GC model. It delivers torque for upper structure rotation and integrates the motor with the reduction gear into a single unit. Precision machining ensures stable rotating output and reliable sealing performance, making it suitable for equipment overhaul and replacement.

• Swing slow or weak rotation torque
• Swing jitter and abnormal noise during rotation
• Oil leakage from motor sealing surface and joint
• Unable to swing or swing brake failure
• Swing drift after stopping

• Confirm machine model before ordering
• Check part number against your old swing assembly
• Keep hydraulic oil clean during installation
• Replace seal kit together if needed