This swing motor assembly is the powerhouse for the upper structure's rotation on Volvo excavators, enabling precise slewing and positioning of the boom and bucket. It is engineered with high-quality hydraulic components to deliver consistent torque and smooth operation, outperforming a worn or leaking motor. Operators might experience slow or jerky swing movements, a lack of holding power when stopped, or audible grinding noises from the slew ring area when this assembly is failing.
Always verify with serial number before ordering.
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Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
A failing swing motor often presents as slow, erratic, or weak rotation of the excavator's upper structure. You may also notice a loss of holding power, causing the boom to drift when stopped, or hear grinding noises from the slew ring. Continued operation can lead to increased wear on the slew ring and drive gear, potentially causing a complete loss of rotation.
Thoroughly flush the hydraulic system before installing the new swing motor to remove any contaminants that could damage its internal components. Ensure all hydraulic lines are correctly connected and free of kinks.
Inspect the slew ring gear teeth and the swing bearing for wear or damage, and check the hydraulic oil and filter condition when replacing the swing motor assembly.