Fault Phenomenon: Dynapac F1800C paver conveyor chain frequently jumps teeth or detaches.

Troubleshooting Process:
– Checked cylinder: tension cylinder internal leakage, unable to hold pressure.
– Checked check valve: pressure holding valve failed.
– Checked spring: return spring broken.
– Checked lubrication: lack of lubrication.

Root Cause: The piston seal inside the conveyor chain tension cylinder failed, unable to build and maintain tension pressure, causing the chain to slack.

Required Parts: Replace tension cylinder seal repair kit.