Fault Phenomenon: SANY SAP90C paver track tension cannot be maintained, often becomes loose.

Troubleshooting Process:
– Checked cylinder: tension cylinder piston rod seal failed.
– Checked check valve: pressure holding check valve internal leakage.
– Checked grease fitting: grease fitting clogged.
– Checked dust cover: dust cover damaged.

Root Cause: The piston rod oil seal in the track tension cylinder is worn, causing grease leakage and inability to maintain tension pressure.

Required Parts: Replace track tension cylinder seal repair kit.