Fault Phenomenon: XCMG RP1253 paver transmission oil contamination severe, clutch discs wear prematurely.

Troubleshooting Process:
– Checked filter: filter clogged, high pressure differential.
– Checked bypass valve: spool stuck in open position.
– Checked spring: spring broken.
– Checked oil quality: oil extremely dirty.

Root Cause: The transmission oil filter was not replaced for a long time; the high pressure differential caused the bypass valve to open or the valve stuck open, allowing unfiltered oil to enter the transmission.

Required Parts: Replace transmission oil filter and clean system.