Fault Phenomenon: LiuGong 835 wheel loader a periodic “whining” sound comes from the drive axle while driving, louder under load.

Troubleshooting Process:
– Checked gears: excessive bevel gear backlash or tooth surface spalling.
– Checked bearings: differential bearings worn and loose.
– Checked lubrication: insufficient or deteriorated gear oil.
– Checked bolts: main reducer housing mounting bolts loose.

Root Cause: Improper adjustment of the main reducer drive pinion and ring gear backlash caused tooth surface fatigue spalling over time.

Required Parts: Replace main reducer gear set and bearings, readjust meshing pattern.