What is the purpose of attaching a Hot Box Tag to equipment near a hot bearing?

• A. To identify the bearing for inspection
• B. To indicate the bearing has overheated and needs replacement
• C. To mark the car for removal from service
• D. To instruct to lubricate the bearing

Answer: (A)

Flagging a hot bearing to flag for inspection. The Hot Box Tag is placed near a bearing that’s running hot to signal crew and maintenance that this specific bearing needs to be checked right away. It helps locate the problem quickly, guiding technicians to assess temperature, lubrication, wear, and any damage so they can decide on the proper corrective action. The tag’s purpose is to prompt inspection, not to instruct replacement or lubrication directly, or to remove the car from service by itself.