. Railway mechanical engineer . of from 45 to 65 tons, and steel wheels with apressure of from 65 to 85 tons. The wheels for the 70-ton truck are to be M. C. B. stand- steel, complete with lids and M. C. B. type reinforced woodendust guards suitable for axles with 5-in. by 9-in. journals,5Jj-in. by 10-in. journals, or 6-in. by 11-in. journals, as thecase may be. All boxes to be thoroughly cleaned and packed April. 1918 RAILWAY MECHANICAL ENGINEER 207 with journal box packing which has been saturated withfreight car lubricating oil. Journal Bearings.—To be of brass, lead lined, M. C. Bspecifica
. Railway mechanical engineer . of from 45 to 65 tons, and steel wheels with apressure of from 65 to 85 tons. The wheels for the 70-ton truck are to be M. C. B. stand- steel, complete with lids and M. C. B. type reinforced woodendust guards suitable for axles with 5-in. by 9-in. journals,5Jj-in. by 10-in. journals, or 6-in. by 11-in. journals, as thecase may be. All boxes to be thoroughly cleaned and packed April. 1918 RAILWAY MECHANICAL ENGINEER 207 with journal box packing which has been saturated withfreight car lubricating oil. Journal Bearings.—To be of brass, lead lined, M. C. Bspecification grade A. Journal Bearing Wedges.—To be: (1) drop forged, or (2)cast steel. Wedges to be M. C. B. type, suitable for axles Painting.—Trucks to receive two coats of carbon blackpaint. Paints to be in accordance with United States Stand-ard Specification which are shown in the speciiications forthe car bodies. The following United States Standard Specifications, forjournal box packing and journal box oil, are to apply:. Fig. 21—General Plan of the Standard 70-Ton Truck with 5-in. by 9-in., Syi-in. by 10-in., or6-in. by , as the case may be. Material Specifications.—The following M. C. B. specifi-cations for materials are to apply: Axles Bolts and nuts Boiled linseed oil Brake beams Brake shoes Carbon steel bars for springsCast iron wheelsCast steel bolstersCast steel truck side framesSteel wheelsHelical springsJapan drier Journal bearingsMalleable iron castingsMild steel barsSteel castingsPressed steel bolstersailway Raw linseed oilRed lead Rivet steel and rivetsStructural steel, steel plates and steelsheets for freight equipment carsTurpentine White lead for letteringWrought iron bars JOURNAL BOX PACKING SPECIFICATIONS The material desired under these specifications is curledvegetable fiber so curled as to impart to it the maximumresiliency; wool and cotton threads free from large lumps ofan} one component part and thoroughly machined and inti-mately
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
