Missouri Pacific Northerns

In the early 1940s, the Missouri Pacific Railroad converted all 25 of its 2-8-4 Berkshires into 4-8-4 Northerns. These rebuilt locomotives (road numbers 2101 through 2125) were given 75" drivers, greater boiler capacity, a cast steel engine bed and roller bearings on all axles. They had 28 x 30 cylinders, a boiler pressure of 250 psi, a total weight of 449,950 lbs and a tractive effort of 66,640 pounds.

In 1943, 15 more Northerns (road numbers 2201 through 2215) were delivered from the Baldwin Locomotive Works. These "war babies" were duplicates of the 1938 D&RGW 4-8-4s and had 73" drivers, 26 x 30 cylinders, a boiler pressure of 285 psi, a weight of 496,000 lbs and a tractive effort of 67,200 pounds.

There are no survivors.

Qty.	Road Numbers	Year Built	Builder
25	2101-2125	1940-1942	MP
15	2201-2215	1943	Baldwin

Rebuilding Road Numbers 2101 - 2125
Road Nos	Road Nos.
4-8-4	Former 2-8-4	Rebuild Date
2101	1904	Aug., 1940
2102	1910	Sep., 1940
2103	1911	Nov., 1940
2104	1903	Dec., 1940
2105	1924	Mar., 1941
2106	1919	Mar., 1941
2107	1923	Apr., 1941
2108	1906	Jul., 1941
2109	1908	Jul., 1941
2110	1912	Jul., 1941
2111	1918	Oct., 1941
2112	1920	Nov., 1941
2113	1921	Dec., 1941
2114	1909	Jan., 1942
2115	1913	Jan., 1942
2116	1916	Feb., 1942
2117	1917	Mar., 1942
2118	1905	Mar., 1942
2119	1914	Apr., 1942
2120	1901	May, 1942
2121	1925	May, 1942
2122	1922	Jun., 1942
2123	1915	Jul., 1942
2124	1907	Jul., 1942
2125	1902	Aug., 1942

Specifications
	Nos. 2101-2125	Nos. 2201-2215
Wheel Arrangement:	4-8-4	4-8-4
Length:	102' - 0"	106' - 0"
Drivers:	75 dia.	73" dia.
Weight on Drivers:	279,300 lbs	279,400 lbs
Locomotive Weight:	445,950 lbs	489,000 lbs
Locomotive & Tender Weight:	769,830 lbs	776,700 lbs
Grate Area:	88.3 sq ft	88.3 sq ft
Cylinders (dia. x stroke):	(2) 28" x 30"	(2) 26" x 30"
Boiler Pressure:	250 psi	285 psi
Tractive Effort:	66,640 lbs	67,200 lbs
Tender Capacity:
Water:	17,250 gals.	19,350 gals.
Coal:	20 tons	20 tons

Missouri Pacific Northerns

Photos

References