EMD McCook 0054 7-7-16

7/7/16: A neat view of the SD59MX HumpBacker 9900 and the compact size of the 4700HP F125 "Spirit" destined for LosAngeles Metrolink commuter service.

From en.wikipedia.org/wiki/EMD_SD32…
The SD59MX is remanufactured from the carbody and major mechanical and electrical subsystems of an EMD SD60M "donor". The EFI-equipped 710 engine, however, is all new as are the engine and locomotive control systems. Union Pacific is the first Class I railroad to order them. The engine control system is adaptable to both minimum emissions and minimum fuel consumption modes, depending upon their assignment.

The EMD SD59M-2, more commonly referred to as the SD59MX, is one of the rarest locomotives in the Union Pacific motive power fleet. SD59M-2s are remanufactured SD60Ms.

Spotting features:

Wide-nose, so far only the later two-window wide nose rather than the earlier three-window "tri-clops" wide nose and none of the traditional 40 Series cab SD60s have been converted.
Slightly slanted radiator air intakes.
High-adhesion HT-C trucks, reused from the "donor" SD60M, rather than the newer "radial" or "bolsterless" trucks. Nearly all SD40-2s and SD50s used the same truck.
Safety fuel tank like that found on current SD70Ms.