Here is a link to some interesting modifications to former CP SD40-2's used in South America. The lighter rail requires the use of dual trucks.
http://www.canadianrailwayobservations.com/2010/03/southamerica.htm
Here is a link to some interesting modifications to former CP SD40-2's used in South America. The lighter rail requires the use of dual trucks.
http://www.canadianrailwayobservations.com/2010/03/southamerica.htm