Fault Phenomenon: JLG 600S telescopic boom aerial work platform when the telescopic boom extends, there is severe jitter and jerking.

Troubleshooting Process:
– Checked telescoping chains: chain tension uneven.
– Checked wear pads: wear pads severely worn, excessive clearance.
– Checked telescoping cylinder: cylinder jerks.
– Checked lubrication: insufficient lubrication.

Root Cause: The telescopic boom wear pads are excessively worn, causing excessive clearance between boom sections and resulting in jitter.

Required Parts: Telescopic boom wear pad kit.