 WF's 62 and 404 were used to run the demolition trains, while WF 397 remained at Nelson as the spare engine.However, 397 was only used once on the demolition trains in April 1956, only to be failed when it dropped a fusible plug.The locomotive was not repaired as both 62 and 404 were in reasonable condition, and therefore 397 would only need to be resurrected should one of the other two locomotives fail.