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Northern Pacific No. 5140
Picture: Northern Pacific No. 5140

During the time period from 1943-1944, Alco built locomotives No. 5130-5149. Designated as model Z-8, these giants weighed in at 644,000 lbs not including the tender and had a tractive effort of 106,890 lbs.  The wheel arrangement was 4-6-6-4  and the drivers were 70 inches in diameter.  These locomotives ran from the  Rocky Mountain Division as far west as Easton, Washington. The Z-8 locomotives were some of the finest steam power ever produced.

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