introduction of tier 4 standards

[CSX5202]

Since the EPA decided that they're going to implement tier 4 standards What will happen to the current locomotives that are operational? And what about the CSX SD40-3 rebuild? Will the engines used now be the CAT 1010? or will they still use the tried and true 645E3?

[buzz456]

Most of the existing locomotives on the class ones are exempt until rebuild. There are a zillion exceptions for others and short lines.

[CSX5202]

So, for instance, CSX 8888 is headed to Boise, Idaho for an overhaul. So, could it be assumed that after it's conversion to an SD40-3, that it will not have the 710?

[buzz456]

That's way over my head pal.

[Bcbuhler]

I believe tier 4 only applies to locomotives built after January 1, 2015 rebuilds have a different set of emissions standards to meet at least with my understanding.

[AlcoFan]

So, for instance, CSX 8888 is headed to Boise, Idaho for an overhaul. So, could it be assumed that after it's conversion to an SD40-3, that it will not have the 710?

The SD40-3's retain their 645's. They have never received 710's.

[Ericmopar]

I believe tier 4 only applies to locomotives built after January 1, 2015 rebuilds have a different set of emissions standards to meet at least with my understanding.

That's what I had read somewhere. I thought the rebuilds on the older engines only needed to reach tier 2.
I think they had already meet that requirement years ago with the electronic fuel injection improvements. IE new injectors and injector control packages.
It's also why a lot of those rebuilds get much better fuel economy than the original engines.

[CSX5202]

what kind of fuel economy exactly?

[BNSFdude]

Less gallons per hour consumed.