Associated with the vast adjoining industrial base, for many years CN’s Hamilton Ontario Stuart Street Yard complex was home to a sizeable switcher fleet, mostly comprised of locomotives constructed by Montreal Locomotive Works (MLW). Resident familiar unit into the mid 1980’s was the S-4. Among the more popular of switcher models to be produced by Alco/MLW, CN’s S-4’s were supplied from 1951 through to 1957. As is well known, MLW’s production mimicked that of parent Alco; for S-4’s this included a McIntosh and Seymour model 539 prime mover along with Canadian General Electric (CGE) traction motors and electrical gear. Initially, from 1949 until 1962, MLW contracted the manufacture of the 539 prime mover to Dominion Engineering Work (DEW) prior to bringing production in house. CGE hardware came from Peterborough Ontario. Unlike previous S-1 through S-3 switcher production, both Alco and MLW would modify the carbody, albeit not in the same fashion. Starting with the S-1, the low height switcher hood featured the Otto Kuhler design elements of soft bevels and generously curved edges. During S-4 production, most likely to improve fabrication, the carbody was modified to include tighter round corners along the length and overlapping ends (Alco)/feathered edge ends (MLW). MLW took the modification one step further by changing access door louvers to carbody filters. In total, almost 1,000 S-4’s would emerge from Schenectady and Montreal (second only to the S-2). See https://www.american-rails.com/705.html for additional information.
|The fate of No. 8169? Online photos show the venerable unit stored out of service in 1986, still at Stuart Street. Note the Dofasco containers at the intermodal facility in the background.|