DT5 - Hot Axle Boxes Handout

Question 1

If you become aware that a vehicle on your train has a hot axle box what must you do?

Answer 1

• stop the train immediately
• contact the signaller
• do not move the train
• carry out any instructions given
• if possible, move passengers from the affected vehicle

Question 2

If a hot axle box is confirmed, what is the max speed during any movement?

Answer 2

10mph, 5mph over points or crossings

Question 3

After examining the train, and you find no evidence of a hot axle box, how would you proceed?

Answer 3

Normally

Question 4

If the train is stopped by another HAB detector activation within 50 miles what must you do?

Answer 4

• don’t move train until instructed to do so
• carry out any instructions given
• proceed at max 20mph

Question 5

If you’ve had a HAB detection and continued, how long before you’ll be stopped to complete another inspection?

Answer 5

50 miles

Question 6

If requested to examine for a hot axle box, what must you do?

Answer 6

1. Examine the axle box on the vehicle concerned, as advised by signaller
2. If no evidence of overheating, next check all axle boxes on that vehicle
3. If no evidence again, next check all axle boxes on the vehicles to either side

Question 7

What must you do if you are unable to conduct an examination within 10 minutes of stopping?

Answer 7

• tell the signaller
• carry out instructions given
• if need to be moved. No more than 20mph

Question 8

What do you need to do if you find a hot axle box?

Answer 8

• obtain authority from signaller to move the train to next location where it can be dealt with
• if possible, move the passengers from the affected vehicle
• must not exceed 10mph, 5mph over any points and crossings