When installing an EOT to the rear of a charged train, the EOT pressure reading displayed in the locomotive HEU must be compared with that on the EOT. How much of a pressure differential between the two is acceptable?

When installing an EOT to the rear of a charged train, the EOT pressure reading displayed in the locomotive HEU must be compared with that on the EOT. How much of a pressure differential between the two is acceptable?

• A. No more than 3 psi
• B. No more than 5 psi
• C. No more than 1 psi
• D. No limit

Answer: (A)

When you install an End Of Train device on a charged train, you’re confirming that the tail-end brake pipe is in proper communication with the locomotive’s reading. The brake pipe pressure shown at the locomotive should match the EOT’s reading within a small tolerance. A differential of no more than 3 psi is allowed because it accounts for minor factors like hose friction, temperature, and measurement variance, while still catching real problems. If the two readings diverge by more than 3 psi, it points to a leak or a poor connection in the tail circuit, which could compromise braking at the rear. In that case, inspect and fix the EOT installation, connections, or hoses and recheck before moving the train.

When you install an End Of Train device on a charged train, you’re confirming that the tail-end brake pipe is in proper communication with the locomotive’s reading. The brake pipe pressure shown at the locomotive should match the EOT’s reading within a small tolerance. A differential of no more than 3 psi is allowed because it accounts for minor factors like hose friction, temperature, and measurement variance, while still catching real problems. If the two readings diverge by more than 3 psi, it points to a leak or a poor connection in the tail circuit, which could compromise braking at the rear. In that case, inspect and fix the EOT installation, connections, or hoses and recheck before moving the train.