EMD GP7/9 710ECO Demonstrator

[YoHo1975]

This is really unlikely. Tier 2 had some of the same provisions and it hasn’t swept anything away.

What will happen is either they’ll find a way to make the 645 Tier 2 compatible or they’ll use this 710ECO product.

Tier 2 didn’t retroactively apply to locomotives built before the effective date of the regulation. Tier 3 is only slightly more strict than Tier 2, but every locomotive built after the effective date of the regulation is required to meet these standards, and every Class I locomotive built prior to the effective date will have to meet Tier 3 standards when it is overhauled or rebuilt. Previously only Tier 0 had a retroactive requirement and it exempted locomotives rated at less than 2300hp or those built before 1973. This Tier 3 covers every locomotive on a Class I railroad period.

Tier 2 had the same provision for Remanufacture of any unit rated Tier zero (well same in the sense that they had to meet tier 1 on remanufacture)

Tier 3 doesn’t cover Units built prior to the 70s. At least I didn’t see any indication it applies as it only talks about Tier 0 or above units. Essentially, if it’s Tier anything and you remanufacture it, it must be Tier 2. Tier 2 required everything to meet Tier 1 on remanufcature.