. Official proceedings . indicated on the elevations and cross-section .34 of the locomotive and is shown in greater detail on sectionthrough the driver axle assembly. The successful solution of the driver l)earing applicationaccounts for the exceptionally smooth-running of the Timkenlocomotive throughout the entire range of speeds up to 85 MPIiand, in a large measure, for the elimination of pounding whileunder steam and when coasting. The roller bearing applicationapparently neutralizes the destructive efifect of the reciprocatingl)arts. The aljsence of vibration and pounding gives the im-pre


. Official proceedings . indicated on the elevations and cross-section .34 of the locomotive and is shown in greater detail on sectionthrough the driver axle assembly. The successful solution of the driver l)earing applicationaccounts for the exceptionally smooth-running of the Timkenlocomotive throughout the entire range of speeds up to 85 MPIiand, in a large measure, for the elimination of pounding whileunder steam and when coasting. The roller bearing applicationapparently neutralizes the destructive efifect of the reciprocatingl)arts. The aljsence of vibration and pounding gives the im-pression that in some way the reciprocating parts have beenthrown out of gear with the closing of the Rear trailing truck box The EXGIXE TRUCK application is similar in general de-sign to the driNcr in that use is made of a single bearing ap-])lication, Jiousing extending across the frame and trunnionguides interposed between the ])earing housing and the i)edestalsof the engine truck. This ai)plication has seen extended andvery successful use. The TRAILER apjjjication on l)oth the leading trailer andrear trailer axles is a direct replacement of the plain applications are of the double bearing type which con-struction is necessary on outboard applications, on account oftlie desirabilitv of mounting roller bearings in i)airs. The nominal size of the leading trailer axle is T x 14 andof tlie rear l)x]l. The l)earing housing for the rear trailer 35 axle is mounted dirrclly in tlic trailer truck i)e(lestals in thecon\entional way luit the front trailer truck is jjroxided with aself-centerini; lateral motion de\ice which permits of I lateralmotion of the axle housing and beari


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