Fault Phenomenon: BelAZ 7540 mining truck a harsh metallic grinding sound comes from the frame while driving, turning is jerky.

Troubleshooting Process:
– Checked bearing: articulation bearing completely shattered.
– Checked seal: floating oil seal failed, water and mud ingress.
– Checked lubrication: grease lost.
– Checked tension: not applicable (articulation structure).

Root Cause: The articulation bearing floating oil seal failed, allowing mud and water to enter the bearing body, causing lubrication failure and rapid wear leading to cage collapse.

Required Parts: Replace articulation bearing assembly and adjust clearance.