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What causes a grinding noise in the slewing ring when swinging a load?

TR-008 · Troubleshooting
Grinding noise in the slewing ring typically indicates worn bearing races, inadequate lubrication, or contamination in the bearing assembly.
Grinding noises from the slewing ring during load swinging operations are primarily caused by three factors. First, worn bearing races or rolling elements create metal-on-metal contact, producing distinctive grinding sounds that worsen under load. This wear often results from exceeding rated capacities, improper load distribution, or normal service life expiration.
Reference: ASME B30.5 Mobile and Locomotive Cranes standard
Remember: WLC - Worn races, Low lube, Contamination causes slewing ring grinding

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swing bearing noiseslewing ring grindingcrane maintenance

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