Slight abnormal noise from drive shafts, walking mechanisms and gearboxes is the most intuitive early warning of machinery faults. Many overseas operators continue working with abnormal noise, ignoring hidden problems such as component wear, insufficient lubrication and unbalanced gaps. Long-term neglect causes drive shaft fracture, gearbox damage and walking mechanism jamming, leading to expensive overhauls. Different noises correspond to different faults: friction noise means insufficient lubrication, impact noise indicates loose parts, and continuous roaring reflects abnormal gearbox load. Regular lubrication, component fastening and gearbox oil inspection solve problems at the initial stage, preventing minor faults from evolving into severe equipment failures and ensuring long-term transmission system stability.