crs1026
Superstar
Except GO has knowledge and maintenance history with them. The F59s work for now, and there's no learning curve / retooling / restocking of on-hand parts required.
I'm also wondering if repowering a used loco is an option? I note this is a service Progress Rail offers, but I have no idea if this work can achieve Tier 3 or 4 standards.
It is doable, but likely has a premium in cost, and it becomes a new learning curve if the new equipment needs new control systems or programming. Rebuilding to OEM is the most straightforward option where the components are time proven and familiar.
Let's remember, the big carbon and fuel savings is in expanding ridership and reducing private automobile use. Getting to Tier IV is gravy, but not a mission critical item for the next few years.
- Paul