Fault Phenomenon: JLG 800S telescopic boom aerial work platform with the boom fully extended, the platform wobbles severely with light force, poor stability.

Troubleshooting Process:
– Checked boom clearances: boom wear pads severely worn.
– Checked hydraulic cylinders: cylinder internal leakage causing soft support.
– Checked ground: ground uneven or outriggers not leveled.
– Checked wind speed: wind speed exceeds limit.

Root Cause: The telescopic boom wear pads are excessively worn, causing excessive clearance between boom sections and reduced rigidity.

Required Parts: Boom wear pad kit replacement and adjustment.