Fault Phenomenon: Liebherr deep-sea operation crane winch brake disc overheats and alarms after prolonged lowering operations.

Troubleshooting Process:
– Checked brake clearance: clearance too small.
– Checked water cooling system: cooling water line clogged.
– Adjusted clearance, cleared cooling water line.

Root Cause: Brake clearance was too small, causing excessive friction-generated heat, and the cooling system failed.

Required Parts: Cooling water line, seals.