Fault Phenomenon: Lonking 850 wheel loader when changing transmission oil, a large amount of metal shavings and friction material powder are found in the oil pan.

Troubleshooting Process:
– Checked clutches: transmission clutch friction discs severely worn.
– Checked bearings: input or output shaft bearing cage collapsed.
– Checked gears: planetary gears pitted or broken teeth.
– Checked strainer: transmission strainer clogged.

Root Cause: The transmission clutch friction discs reached their service life limit; excessive wear debris contaminated the entire hydraulic system.

Required Parts: Overhaul transmission, replace all friction discs, steel plates, and seals; thoroughly clean transmission.