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The 710 series replaced the earlier EMD 645 series when the 645F series proved to be unreliable in the early 1980s 50-series locomotives which featured a maximum engine speed of 950 rpm. [note 1] The EMD 710 is a relatively large medium-speed two-stroke diesel engine that has 710 cubic inches (11.6 liters) displacement per cylinder, [1] and a ...
EMD introduced their new 710 engine in 1984 with the 60 Series locomotives (EMD SD60 and EMD GP60), the EMD 645 engine continued to be offered in certain models (such as the 50 Series) until 1988. The 710 is produced as an eight-, twelve-, sixteen-, and twenty-cylinder engine for locomotive, marine and stationary applications.
The "S" designation originally stood for six hundred horsepower and the "N" designation for nine hundred horsepower, although they were used for the more general designation of smaller and larger engine models after the more powerful 567 model engines replaced the Winton engines. The "C" designation stood for cast frame locomotives and the "W ...
The MP40PH-3C introduced a new prime mover, the larger 16-cylinder EMD 710G3B series diesel engine, capable of generating 4,000 hp. The MP40PH-3C also uses an EMD alternator and traction motors. The launch customer for the MP40PH-3C was GO Transit, a commuter railroad in the GTHA (Greater Toronto and Hamilton Area). The MP40PH-3C was developed ...
The class entered service in 1999. A Dedicated Passenger version of this locomotive, the WDP-4 (EMD GT46PAC), has also been produced, with a Bo1-1Bo Wheel Configuration, which entered service in 2001. These locomotives are also famous for, and can be identified by, the distinct Jet Turbine Engine–like sounding property of the EMD 710 prime mover.
Later versions of the EMD 645 engine were used in the EMD SD45-2 and EMD SD45T-2 locomotives. EMD also produces a V20 version of the EMD 710 diesel engine, which was used in the 1995 EMD SD80MAC locomotive. [6] [7] The EMD 710 remains in production to this day, [citation needed] and is mostly used in power generation and marine propulsion.
The locomotives are of the Prima type, produced at Alstom's plant in Valencia, Spain in collaboration with GM-EMD; the locomotives use EMD traction equipment and an EMD 710 engine. [1] [4] The units were ordered in 1996 and entered service in 1998. [3] [4]
This led to better adhesion with the rails to provide better acceleration with heavy trains. Moreover, the original EMD 710 engine was tweaked to produce an output of 4,500 HP instead of the original 4,000 HP. this Up-rated engine was designated as EMD 16N-710G3B-EC, with an RPM of 910 at Notch-8. This locomotive came to be known as the "GT46PACe".