In 1941 Number 9000 was commissioned by the Dominion government and rebuilt at Transcona Shops to represent a camouflaged boxcar. At this time, the Beardmore engine was replaced with an EMD 16-567A marine engine because of the difficulty in getting parts for the former. It served as a power unit in British Columbia at the time a Japanese invasion was a threat and pulled an armoured train.
This latter role for Number 9000 was a well-kept secret to almost everyone—even to us working at Calder during the war. It must have gone through Edmonton on its return when the invasion threat diminished in 1944, but we didn’t hear of it. Number 9000 was given back to the CNR, its shroud removed, and the units put back into service between Québec and Edmundston until their retirement for good on May 20, 1946. The configuration after removal of the shroud was different from its original look, as seen in the accompanying picture.