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.