Locomotive breakdown questions answered and illustrated by Wallace W. G

Author:Wallace, W. G
Language: eng
Format: epub, pdf
Tags: Locomotives
Publisher: Chicago, F. J. Drake & Co.
Published: 1907-03-25T05:00:00+00:00

Deflection of Coil Spring.

138 LOCOMOTIVE BREAKDOWN QUESTIONS

Our superintendent of motive power claims to bore them I-64-inch larger than the journal and let them go without fitting."

Answer. —It is common practice to file out the crown of the brass about 3 inches wide and file or scrape to a good bearing on the sides. The weight on the box will soon bring the bearing down on the crown. We have seen brasses bored out i-64-inch larger than the journal and holes bored in the brass for babbitt and then bored out, leaving the babbitt spots higher than the brass, and they run good withoujfc fitting the brass to the Journal. Your superintendent no doubt is successful in employing this method, and if the engines are properly broken in and run good he is saving expense of fitting. This is not the general practice.

192. Squaring Valves. —"Do you think it proper to run over the full travel of the valves on a locomotive in the forward and back gear and divide the valve travel between the two gears with the reach rod. Then adjust the eccentric rods so that they will divide up on each side of the port openings equally without putting up the main rod. Will she be square on the dead center?"

Answer. —We presume you mean will she be square when hooked up at short travel of valve or cut-off, and would say hardly on all classes of engines. It's usually close work to get them square with the main rod up, and would not recommend this system.

193. Piston-Valve Chamber. —*T would like to know the proper name for the valve cylinder on a piston-valve engine. All I have ever heard it called was a steam chest. Is this proper?"

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