EMD SD45X

EMD SD45X
Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Division (EMD) Model SD45X Build date June 1970 – February 1971 Total produced 7
Specifications Configuration: ​  • AAR C-C Gauge Template:4ft8.5in Prime mover EMD 645E3A Cylinders 20
Performance figures Power output 4,200 hp (3.1 MW)
Career Locale United States

An EMD SD45X is a 6-axle experimental diesel locomotive built by General Motors Electro-Motive Division between June 1970 and February 1971. Power was provided by an EMD 645E3A 20-cylinder engine which generated 4200 horsepower (3.1 MW). 7 examples of this locomotive model were built for American railroads. 6 of these units would end up in service with Southern Pacific Railroad. One was rebuilt in 1980 by Morrison-Knudsen into an SD45Xm with a long hood from a scrapped DD35.

Original owners

Qty.	Railroad	Road Numbers	Date	Builders #s	Notes
1	EMD	4201	6/70	36806	(1)
2	EMD	4202, 4203	2/71	36807, 36808	(2)
1	EMD	5740	6/70	36806	(1)
1	Southern Pacific	9500	8/70	35741
21	Southern Pacific	9501, 9502	9/70	35742, 35743
(1) EMD demo, to SP 9503, 12/72 (2) EMD demo, to SP 9504-9505, 12/72

References

• Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
• Sarberenyi, Robert. EMD SD45X Original Owners. Retrieved on August 27, 2006