Diagram from the EMD FP-45 operation manual
Santa Fe diesel locomotive #93 was one of nine FP-45 passenger diesels built in 1967 by General Motor's Electro Motive Division (EMD) for Santa Fe. Originally numbered #103, it served for 31 years, and was assigned several different numbers and paint schemes. The FP-45 was a variation of similar EMD freight locomotive designs. However, it was geared for passenger train speeds, and included a steam generator (item 21), which was used for climate control in passenger cars. 

The locomotive through the years:

Thanks to our friends who contributed photos and video footage.

A detailed history with photographs of 93's various paint schemes may be found on Evan Werkema's excellent site.

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