Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 439
s a fewmoments attention each day to keep the plant inperfect condition. If the commutator becomes rough or out of round,it should be trued up in a lathe. The tool used mustbe very sharp, and light cuts must betaken, then polishit with fine sandpaper. It must be carefully examinedto see that no two… … INJECTORS, STEAM GAUGES, ETC. 433 face, for it does not wear away as fast as the copper,and if the mica is not cut away it may lead to spark-ing. After doing this, be sure no ragged edges otcopper stick up, for this will cut away the brushesrapidly. The speed of the armature should be as near1,800…
Locomotives
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