Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . figure 29. steel scriber or penknife mark the location of thecrosshead on the guides A, also provide a secure rest-ing place upon the floor of the engine-room for amarkef to be placed against the rim of the rest should be firmly fastened to the floor in orderthat its position may not be changed during the opera-lion of valve setting. Place the marker against thewheel as at B and mark the point with a center punchor cold chisel. Next turn the engine carefully untilthe crosshead completes
Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . figure 29. steel scriber or penknife mark the location of thecrosshead on the guides A, also provide a secure rest-ing place upon the floor of the engine-room for amarkef to be placed against the rim of the rest should be firmly fastened to the floor in orderthat its position may not be changed during the opera-lion of valve setting. Place the marker against thewheel as at B and mark the point with a center punchor cold chisel. Next turn the engine carefully untilthe crosshead completes the stroke and moves back onthe return stroke until the mark A is in line another mark on the rim of the wheel oppositethe marker at C. This position of the engine isshown in Fig. 30, and it will be seen that the crank isnow as much above the center as it was below in Fig. 152 ENGINEERING 29. Now with a pair of large dividers ascertain themiddle or half distance between marks B and C andput another mark, D, at this point. Then turn the. FIGURE 30. engine a complete revolution until mark D comesopposite the pointer, Fig. 31, and the engine will beon the true center. At this point the question may arise, why not simplyreverse the motion and back the wheel up until themark D is in line with the marker? The answer is,
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Keywords: ., bookcentury1900, bookdecade1900, bookpu, booksubjectsteamturbines
