Fault Phenomenon: Zoomlion aerial work platform after releasing the platform rotation button, the platform does not stop and continues rotating due to inertia.

Troubleshooting Process:
– Checked swing brake: brake pads excessively worn.
– Checked swing motor brake valve: spool stuck in open position.
– Replaced brake pads and brake valve.

Root Cause: The swing brake system failed, unable to provide sufficient braking torque.

Required Parts: Brake pads, brake valve assembly.