Swing Motor Assembly 397-3825 for E307 E305.5 E306 Excavator

This hydraulic swing motor assembly is the core rotating drive component of an excavator, compatible with the E307, E305.5, and E306 models. It delivers torque for upper-structure rotation and integrates both the motor and the reduction gear into a single unit. Precision machining ensures stable rotating output and reliable sealing performance, making it well suited for equipment overhaul and replacement.

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

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