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UP UM20 620
Title:  UP UM20 620
Description:  UP UM20 620 at Council Bluffs, Iowa on an unknown day in October 1963, photographer unknown (although I believe it was Lou Schmitz, the slide did not have an Author's name), Chuck Zeiler collection. This locomotive was built in September 1954 (c/n 32218) as part of an A-B-B-A test vehicle for GE's entry into the road locomotive business.

This unit and one B unit were equipped with 12-cylinder Cooper-Bessemer FVBL-12 diesel prime movers (these two were informally known as Model UM-16, 1600 hp), while the other A-B units were equipped with 8-cylinder C-B FVBL-8 diesels (informally known as UM-12 for the 1200 hp they produced). The purpose was to test existing designs in road locomotives. Alco had upset GE by not bidding on a couple of locomotive contracts that GE was interested in, so GE set out on its own to build a road diesel, which in the long run proved fatal to Alco. From 1954-1959, the UM-20 (also known as UM-20B) tested on the Erie, painted in Erie colors and numbered #750A-B-C-D. Since GE's design department had a hand in locomotive designs at Alco, there is a similarity between this design and the FA-1/FA-2 Alcos. These locomotives lead to the design and development of the U25B. After the Erie road tests, the locomotives were returned to GE, where all four units were upgraded to 2000 horsepower locomotives with 12-cylinder C-B FVB12LT diesel prime movers, and sold to the UP on October 21, 1959 as #'s 620-620B-621B-621. They were retired by the UP in 1963 and traded to GE on U50's.

Photo Date:  10/1/1963  Upload Date: 11/20/2010 1:33:43 PM
Location:  Council Bluffs, IA
Author:  Chuck Zeiler
Categories:  Roster
Locomotives:  UP 620(UM20)
Views:  4416   Comments: 3
Title:  ERIE 750A
Description:  Thanks for finding this Wendy. Date approximate.
Photo Date:  6/16/1958  Upload Date: 2/8/2013 9:47:31 AM
Location:  Salamanca, NY
Author:  Audio Visual Designs
Categories:  Action
Locomotives:  ERIE 750A(UM20)
Views:  1512   Comments: 14
ERIE 750A & B are both new here.
Title:  ERIE 750A & B are both new here.
Description:  The A had 2000HP and the B had 1200HP.
Photo Date:  7/2/1958  Upload Date: 7/2/2012 11:46:47 PM
Location:  Akron, OH
Author:  Sturges & Folsom
Categories:  Yard
Locomotives:  ERIE 750A(UM20) ERIE 750B(UM20)
Views:  1837   Comments: 9
ERIE 750D is also new here.
Title:  ERIE 750D is also new here.
Description:  These units were test beds owned by GE.
Photo Date:  7/2/2012  Upload Date: 7/2/2012 11:51:52 PM
Location:  Akron, OH
Author:  Sturges & Folsom
Categories:  Yard
Locomotives:  ERIE 750D(UM20)
Views:  1070   Comments: 13

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