Abstract
This paper sketches the application of Diesel-electric equipment to rail traction on the Canadian National Railways, and deals particularly with experiences in the maintenance of high-speed Diesel engines since 1925. The circumstances surrounding the early application of this type of motive power are briefly explained. Problems of repair by steam-locomotive maintenance organizations are outlined. The important records pertaining to performance and measurements of wear occurring on various parts of Diesel engines are described. Typical examples of records developed in handling pistons, cylinders, and crankshafts, which were employed in arriving at a systematic handling of these parts, are illustrated. This is followed by an explanation of curves covering the average rate of wear found on different groups of engines taken from records extending over many years. Brief reference is made to maintenance methods developed in steam-locomotive service and advantageously extended to Diesel repairs. These include illustrations on electric and acetylene welding, together with some experiences with hard chromium plating, employed to extend the life of active engine parts. The paper is concluded with an explanation of the trends of various factors which make up the cost per car-mile of Diesel-engine operation, and relate particularly to engines which have seen considerable service.
