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A switcher may also be called a yard pilot, switch engine, or yard goat. The term can also be used to describe the workers operating these engines or engaged in directing shunting operations. Switching locomotives may be purpose-built engines, but may also be downgraded main-line engines, or simply main-line engines assigned to switching.
The mediumweight diesel locomotive VR Class Dv12 was designed as a road switcher. It is widely used as a shunter on switch yards, but it is also used as a line locomotive, both for passenger and freight trains, on unelectrified tracks. The first Dv 12 engines entered service in 1963, and they are planned to serve up until 2040s. [citation needed]
The locomotives were available with a choice of prime movers. Most were built with a pair of Caterpillar's D17000 V8 180 horsepower (134 kW) engines, but three other engine types were used. Nine were built with a pair of Hercules DFXD engines; two were sold to Chattanooga Traction and seven were sold to Missouri Pacific Railroad and its ...
The locomotive was equipped with two 150 hp (110 kW) Cummins diesel engines, each driving a GE 1503 generator which, in turn, drove one of the two GE 733 traction motors, one per truck. In early models, the second axle on each truck was driven with side rods. Later models had chain drives inside the trucks that served the same purpose.
In the 1990s Rail Equipment Division at Tooele Army Depot rebuilt most 80-tonners to have Cummins turbo-charged 470 hp (350 kW) 6-cylinder engines. The rebuild included a small cosmetic change resulting in end radiator screens and dual headlights. This rebuild gave all Army and some Air Force 80-tonners a much longer lifespan.
The ALCO S-2 and S-4 are 1,000-horsepower (746 kW) diesel electric switcher locomotives produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). [1]Powered by turbocharged, 6-cylinder ALCO 539 diesel engines, the two locomotives differed mainly in their trucks: the S-2 had ALCO "Blunt" trucks; the S-4, AAR type A switcher trucks.
The GE 70-ton switcher is a 4-axle diesel-electric locomotive built by General Electric between about 1942 and 1955. It is classified as a B-B type locomotive. The first series of "70 tonners" were a group of seven center-cab locomotives built for the New York Central Railroad in November 1942. These units differ from the later end-cab versions.
The most significant change from those earlier models was the use of an engine of EMD's own design, the then-new 567 engine, here in 600 hp (450 kW) V6 form. 661 locomotives of this design were built, [1] with a gap in production between March 1943 and September 1945 due to World War II.