Fault Phenomenon: Haulotte HA16RTJ articulating boom aerial work platform after stopping rotation, the upper structure slides automatically, unable to hold position.

Troubleshooting Process:
– Checked swing brake pads: brake pads severely worn.
– Checked brake release cylinder: cylinder internal leakage, unable to build clamping force.
– Checked gearbox: internal gears damaged.
– Checked hydraulic pressure: pressure normal.

Root Cause: The swing brake hydraulic release cylinder has internal leakage, preventing the brake from fully engaging.

Required Parts: Swing brake repair kit or assembly.