Fault Phenomenon: UpRight AB46 telescopic boom aerial work platform when the telescopic boom extends, the sections move at different speeds, causing sticking.

Troubleshooting Process:
– Checked telescoping chains: chain tension uneven.
– Checked flow divider valve: valve spool stuck.
– Checked cylinders: cylinder internal leakage.
– Checked wear pads: wear pad clearance excessive.

Root Cause: The telescoping boom synchronization chain tension is improperly adjusted or broken.

Required Parts: Telescoping chains and tension adjustment.