A Tale of Two Cities, and Their Trains

A Tale of Two Cities, and Their Trains

SMART and Metrolinx Toronto could be considered to be sister train systems – together they clubbed together to buy trains, or Diesel Multiple Units (DMUs) from Japanese manufacturer Sumitomo Nippon Sharyo. This unit has been in widespread use in Japan as an Electric Multiple Unit, but its’ use in Toronto and Marin is the time it has been coupled with a tier 4 diesel engine – in this case the diesel is made by Cummins. While this is a proven diesel unit the DMUs and this engine have never before been paired – so SMART and Metrolinx are taking risks using this combination. The Toronto line runs 41 miles from Toronto’s Pearson Airport to downtown Toronto. It is called the Union Pearson Express. Metal Fatigue on the Union Pearson Express, Toronto Metrolinx Toronto hit the Marin news lately as a result to metal fatigue in a crankshaft of its’ Cummins diesel engine causing a catastrophic engine failure. Toronto, which has a double tracked line, was able to continue operations. Both train systems are having Cummins replace the crankshafts for all of their diesel engines – Toronto is doing this without disrupting operations, but for SMART this is one reason given for delaying launch. A letter from LTK Engineering in the SMART Board of Director’s 19th October meeting packet (page 85) highlighted the differences between the Union Pearson Express and SMART in the light of the Cummins engine failure: The Toronto line is a double track line, SMART is 85% single track line If a SMART train breaks down there is no way to bypass the failed train. A bus bridge would...