. American engineer and railroad journal . exact center of the can be ascertained by raising and lowering the block bymeans of the reverse lever and oscillating the link (see Fig. i)by taking hold of the lower (now loose) end until there is nomotion to the valve and combination lever. Should it not bepossible to get both sides to remain stationary with one position •See also American Engineer, November, 1908, p. Supervisor of Valve Motion. S. & M S. Ry. of the reverse lever, adjustment must be made on either side inthe lifting device until they do so. Put the crosshead in t
. American engineer and railroad journal . exact center of the can be ascertained by raising and lowering the block bymeans of the reverse lever and oscillating the link (see Fig. i)by taking hold of the lower (now loose) end until there is nomotion to the valve and combination lever. Should it not bepossible to get both sides to remain stationary with one position •See also American Engineer, November, 1908, p. Supervisor of Valve Motion. S. & M S. Ry. of the reverse lever, adjustment must be made on either side inthe lifting device until they do so. Put the crosshead in the middle of its travel, and with straightedges on the lower guides and a tri-square (A, Fig. i) move thecombination lever, loose at the lower end, until a line throughthe centers of the upper two holes is square with the the three holes in this lever are in the same straight line,but in case they are not, the line through the upper two shouldlie taken. Tram the location of the valve and if it is not in central posi-. tion with the valve seat, adjust the valve stem so that the valveis central and change the port marks to suit. Connect the union link: it should not move the combinationlever out of its vertical position; if it does so, adjust the lengthof the union link. Third:—Connect the eccentric rod and put the engine on onecenter; with a convenient tram put a mark on the frame or anattached part, such as the guides, from the center of the frontpin of the eccentric rod (B, Fig. 2). Move the engine to thether center and make a similar mark. These marks should co-incide; if they do not, move the eccentric crank on the main pin April, 1909. AMERICAN ENGINEER AND RAILROAD JOURNAL. 129 until they do. The amount of the necessary change is one-halfof the horizontal distance between the two marks made with thetram, measured on a horizontal line through the eccentric crankpin. Fourth :—Put the engine on either center and move the reverselever from extreme forward
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
