When setting out a car with a hot bearing, which actions must be taken?

When setting out a car with a hot bearing, which actions must be taken?

• A. Cut out the air brakes and do not exceed 4 MPH.
• B. Do not cut out air brakes and maintain current speed.
• C. Cut out the air brakes only.
• D. Increase speed beyond 4 MPH.

Answer: (A)

When a car has a hot bearing, the priority is to prevent further heat buildup and get the car out of service safely. The proper action is to cut out the air brakes on that car so it won’t be braked by the train’s braking system as you move it. Then move the car at a very controlled, slow pace—no more than 4 mph—so you can monitor it and reach a safe inspection point without risking heat buildup or a bearing failure. Keeping the brakes connected would cause brake applications to heat the already hot bearing, and moving faster than 4 mph increases the chance of damage or a failure en route. Cutting out the braking on the hot car and proceeding slowly provides the safest, most controlled way to set it out for repair.

When a car has a hot bearing, the priority is to prevent further heat buildup and get the car out of service safely. The proper action is to cut out the air brakes on that car so it won’t be braked by the train’s braking system as you move it. Then move the car at a very controlled, slow pace—no more than 4 mph—so you can monitor it and reach a safe inspection point without risking heat buildup or a bearing failure.

Keeping the brakes connected would cause brake applications to heat the already hot bearing, and moving faster than 4 mph increases the chance of damage or a failure en route. Cutting out the braking on the hot car and proceeding slowly provides the safest, most controlled way to set it out for repair.