GE Dash 8-40CM

The GE C40-8M is a 6-axle diesel locomotive built by GE Transportation Systems from 1990 to 1994. It is part of the GE Dash 8 Series of freight locomotives, and is often referred to as a Dash 8-40CM.

GE C40-8M
CN Loco No.2442.jpg
CN 2442, a Dash 8-40CM, leads a train eastbound into Battle Creek, Michigan in 2009.
Type and origin
Power typeDiesel-electric
BuilderGE Transportation Systems
Build dateMarch 1990 – March 1994
Gauge4 ft 8+12 in (1,435 mm)
OperatorsSee table
LocaleNorth America, Canada

Mechanically identical to the Dash 8-40CW, the Dash 8-40CM was constructed only for Canadian railways, with a production total of 84 units. It is distinguished from the Dash 8-40CW by the addition of a full-width "Draper Taper" style cowl body, of which they are the last locomotives built with this feature, and the use of a Canadian-specific nose and windshield configuration. The trucks also differ; all units built ride on Dofasco Hi-Ad trucks identical to locomotives built by Montreal Locomotive Works, Bombardier, and Morrison-Knudsen.


The Dash 8-40CM is powered by a 4,000-horsepower (3,000 kW) 7FDL-16 diesel engine driving a GE GMG187 main alternator. The power generated by the main alternator drives six GE 752AG or 752AH direct current traction motors, each with a gear ratio of 83:20 and connected to 40-inch (1,000 mm) wheels which allow the Dash 8-40CM a maximum speed of 70 mph (110 km/h).

Depending on customer options, the Dash 8-40CM carries approximately 5,000 US gallons (19,000 L) of diesel fuel, 410 US gallons (1,600 L) of lubricating oil, and 380 US gallons (1,400 L) of coolant. Like most North American diesel locomotives, the Dash 8-40CM uses normal water for cooling. The Dash 8-40CM has a tractive effort rating of 108,600 lbf (483,000 N) at 11 mph (18 km/h). Overall dimensions for the Dash 8-40CM are 70 ft 8 in (21.54 m) in Length, 15 ft 4 in (4.67 m) in height and 10 ft 2 in (3.10 m) in width.

Original ownersEdit

Railroad Quantity Road numbers Notes
BC Rail 26 4601-4626[1] To CN with BCOL reporting marks. All have cab bell.
Canadian National Railway 55 2400-2454[2] First 30 ordered have high mount cab bell.
Quebec North Shore and Labrador Railway 3 401-403[3] Sold to AEX. AEX renumbered them to 100017-100019. Scrapped in 2016

See alsoEdit



  1. ^ BCOL Locomotive Roster
  2. ^ CN Locomotive Roster
  3. ^ "QNSL Locomotive Roster". Archived from the original on 2010-10-14. Retrieved 2010-01-13.

Further readingEdit

  • McDonnell, Greg (2008). Locomotives: The Modern Diesel and Electric Reference. Erin, Ontario: Boston Mills Press. ISBN 978-1550464931.
  • Solomon, Brian (2003). GE Locomotives: 110 Years of General Electric Motive Power. St. Paul, MN, USA: MBI Publishing. ISBN 9780760313619.
  • Solomon, Brian (2010). Modern Locomotives: High Horsepower Diesels 1966–2000. New York: Crestline. ISBN 978-0785826811.