Fault Phenomenon: XCMG RP1253 paver a loud rumbling sound occurs during screed tamping.

Troubleshooting Process:
– Checked bearing: eccentric shaft support bearing cage collapsed.
– Checked lubrication: lubricating grease dried out.
– Checked load: prolonged high load.
– Checked mounting: bearing housing bolts loose.

Root Cause: The spherical roller bearing on the screed tamper eccentric shaft is damaged due to lack of lubrication and high-frequency vibration, causing raceway spalling.

Required Parts: Replace tamper bearing and apply high-temperature grease.