. The Locomotive . I92I.] THE LOCOMOTIVE, 207. Fig. 10. the case of an old engine it is possible that the cross-head may needto be rebabbitted and refitted to the slide. The condition produced by a crankpin that has been bent out of parallelism with the crankK^SNS\\\\SS\\\\S\S^S\\\3SSSS^ ^l^^ft is illustrated, in ex- aggerated form, in a. Such a condition willproduce overheating andserious strains in the en-gine when it is trueness of the crank-pin in this respect mayreadily be observed byturning the crankpin with the rod to one of the positions shown,measuring the distance
. The Locomotive . I92I.] THE LOCOMOTIVE, 207. Fig. 10. the case of an old engine it is possible that the cross-head may needto be rebabbitted and refitted to the slide. The condition produced by a crankpin that has been bent out of parallelism with the crankK^SNS\\\\SS\\\\S\S^S\\\3SSSS^ ^l^^ft is illustrated, in ex- aggerated form, in a. Such a condition willproduce overheating andserious strains in the en-gine when it is trueness of the crank-pin in this respect mayreadily be observed byturning the crankpin with the rod to one of the positions shown,measuring the distance A, and then swinging the parts to the otherposition and repeating the measurement. If the two distances. A, Aagree, the crankpin is in correct alignment but if they do not agreesome adjustments must be made either by scraping or by suitable ma-chine work. Conditions vary so greatly that no exact procedure forcorrecting this type of fault can be prescribed. Since the crankpinmay be bent in the direc-tion shown in Fig. lib thetest should also b
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