Fault Phenomenon: Caterpillar AP655D paver a loud noise is heard inside the conveyor trough; inspection reveals a wear plate detached.

Troubleshooting Process:
– Checked welds: plug welds cracked.
– Checked loading: direct impact from large rocks.
– Checked plate: plate hardness mismatch.
– Checked installation process: incorrect welding sequence.

Root Cause: The plug welds holding the wear plate to the conveyor trough floor fatigued and cracked due to impact from large material, causing the plate to detach.

Required Parts: Wear plate and rewelding.