This is a swing reduction gear assembly that transmits power from the hydraulic swing motor to the upper structure of the excavator. It is manufactured to meet stringent OEM quality standards, ensuring durability and precise engagement compared to a worn unit with chipped or broken teeth. Operators may notice a loss of swing speed, jerky or erratic swing motion, or an inability to hold the load in position when this component begins to fail.
Always verify with serial number before ordering.
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Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
Initial signs of failure may include a whining or grinding noise during swing operations. If ignored, the noise will intensify, and the swing motion may become sluggish or intermittent. Continued operation risks severe damage to the swing motor and drive gears, potentially immobilizing the equipment.
Ensure the swing motor shaft splines are clean and free of debris before attempting to mate them with the new gear assembly. Do not force the assembly onto the shaft; proper alignment is critical to prevent damage.
Inspect the hydraulic swing motor and its seals for any signs of leakage or wear when replacing the swing reduction gear.