Slewing bearing failures are often progressive and can be detected early by paying attention to the symptoms.
Excessive Play or Looseness
Symptom: A noticeable "clunk" or "knock" sound when starting or stopping the swing motion, especially when changing direction. The upper structure may feel loose on the undercarriage.
Cause: Worn rolling elements (balls or rollers), raceway wear, or loose mounting bolts.
This 199-4476 slewing bearing is used for 325D 329D 329D2 330D2 excavator.
Related part number:
3B-8489
148-4685
