. Railway mechanical engineer . blanks are used in thisholder so that the only grinding required is on the rings are fitted to the grooves after machining by lap-ping on fine emery cloth until they will just enter the grooveunder hand pressure. A Short Cut in Squaring Locomotive Valves Valves Are Squared by This Method Without Apply-ing the Main Rods and Afterwards Removing Them BY WILLIAM ULRICK Foreman Valve Setter, Scranton Shops, Delaware, Lackawanna & Western AT the present time when it is necessary to obtain max-imum production in all locomotive repair shops, thefollowing meth
. Railway mechanical engineer . blanks are used in thisholder so that the only grinding required is on the rings are fitted to the grooves after machining by lap-ping on fine emery cloth until they will just enter the grooveunder hand pressure. A Short Cut in Squaring Locomotive Valves Valves Are Squared by This Method Without Apply-ing the Main Rods and Afterwards Removing Them BY WILLIAM ULRICK Foreman Valve Setter, Scranton Shops, Delaware, Lackawanna & Western AT the present time when it is necessary to obtain max-imum production in all locomotive repair shops, thefollowing method of squaring either Baker or Wal-schaert valve gears without applying the main rods will befound a great time and labor saver. The process has beenused for several months with good success, only an occasionalreadjustment of the valves being necessary, which is likely tohappen with any method of valve setting. In practically all railroad shops the practice is to applymain rods before setting the valves and afterwards it is. Fig. 1—Positions of Parts With Crosshead and Radius Bar on Center necessary to remove them before applying the side rods. Thisis an unnecessary repetition of work and can be avoided bythe following method. The first operation before settingeither of the valve gears referred to is to apply the variousparts of the motion work and see that all are in good workingorder without lost motion or undue friction. Method of Procedure After all parts of the motion work are in place, the portmarks are taken as usual, using a tram to transcribe themarks to the valve stem. Dead center positions of the crankpin are scribed on the wheel center (right or left as the casemay be), using the customary tram. Since the main rods arenot up. a special light fish-tail tram has been devised to taketheir place simply while getting the dead centers. This tramconsists of a brass plate cut in the form of a fish tail andbearing on the crank pin at two points. Attached to thebrass plate
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
