What the assembly does
The swing system allows an excavator’s upper structure to rotate. The motor, reduction gearbox and related parts have different roles.
Identify the required component
Describe whether you need the complete assembly or an individual motor, gearbox or related part. Include the machine serial and any readable assembly markings.
Confirm the details
Photographs and the correct parts drawing help the team review the requirement. Diagnosis and service work should follow the machine manufacturer’s guidance.