Tags: Locomotive.
The RS3m is a diesel-electric locomotive rebuilt from an ALCO RS-3 road switcher. There are many variations with various spotting features the common features being the ALCO RS-3 frame trucks and usually cab and short hood. Railroads started rebuilding their RS-3 fleets early on because of the unreliability of the ALCO 244 prime movers.Perhaps one of the earliest examples of the RS3m is the former Missouri-Kansas-Texas Railroad’s RS3m fleet.