Our Canadian Pacific 6503 S3 Switcher was one of the first bought by Canadian Pacific to test the value of the 660 hp non-turbocharged switcher. No. 6503 was originally assigned to Winnipeg and proved to be sturdy and reliable. The engine has been modified with a buffer plate on the ends, over the coupler, in order to handle passenger cars. This locomotive served the CPR in various locations across Canada until 1983. The unit then sold to United Grain Growers terminals in Vancouver, switching grain cars until it was retired in 1987 and acquired by the WCRA.