Fault Phenomenon: LiuGong 856 wheel loader a “clunking” abnormal noise occurs when turning, unstable driving straight.

Troubleshooting Process:
– Checked pins: articulation main pin worn thinner.
– Checked bushings: upper and lower bushings severely worn, excessive clearance.
– Checked lubrication: grease fittings clogged, lack of lubrication.
– Checked mounting bolts: clamp plate bolts loose.

Root Cause: The articulation pin and bushings between the front and rear frames were severely worn due to long-term lack of lubrication, resulting in excessive clearance.

Required Parts: Replace articulation pin and full set of bushings.