Enabling 360-Degree Rotation:
The core function of the slewing bearing is to allow the 329D's upper structure—including the cab, engine, counterweight, and attachment (boom, arm, bucket)—to swing freely and continuously. This is essential for efficient digging cycles and material placement.
Load Bearing and Transfer:
It acts as the structural heart of the machine, transferring all the operational loads from the upper structure to the undercarriage. This includes the weight of the components themselves, the dynamic forces from digging, and the shock loads from lifting heavy objects.
This 199-4475 slewing bearing is used for 325D 329D 329D2 330D2 excavator.
Related part number:
199-4476
199-4478
