Fault Phenomenon: Terex aerial work platform during operation, the outrigger slowly sinks, causing the body to shake.

Troubleshooting Process:
– Checked hydraulic lock: locking function normal.
– Checked cylinder piston seals: seals worn, internal leakage.
– Replaced outrigger cylinder seals.

Root Cause: The outrigger cylinder piston seals wore out, causing high-pressure oil to leak internally.

Required Parts: Cylinder seal repair kit.