Fault Phenomenon: Hitachi tower crane hoist brake pads require replacement at an abnormally high frequency, short lifespan.

Troubleshooting Process:
– Checked brake clearance: clearance too small, causing partial friction.
– Checked brake springs: springs fatigued and failed.
– Adjusted brake clearance, replaced brake springs.

Root Cause: Brake clearance was adjusted too small, or springs failed, causing the pads to rub even when not braking.

Required Parts: Brake springs, brake pads.