Fault Phenomenon: Caterpillar AP655D paver conveyor belt slack, frequently slips.

Troubleshooting Process:
– Checked spring: heavy-duty spring in tension device broken.
– Checked cylinder: hydraulic tension assist failed.
– Checked adjustment: adjustment screw rusted.
– Checked belt: belt stretched excessively.

Root Cause: The main spring in the mechanical conveyor belt tension device broke due to fatigue, unable to provide sufficient tension.

Required Parts: Replace conveyor belt tension spring.