. Science of railways . Fig. 11—Diagram, Showing Position of Piston Valve, when Settingby Using 3/16-inch Dimension from Top of Cylinder 120 LOCOMOTIVE APPLIANCES. Care should be taken in all cases to see that the top ofvalve bushing is exactly flush with top of cylinder as shownin Fig. 11. Before tightening lock nuts on valve stem, care should cEntfp U\ME OF. Fig. 12—Top View of Valve, Showing Cut in End of Valve Bod;Right Angles to Center Line of Engine Shaft at be taken to see that valve wrist pin is in line with engineshaft. This will be indicated by the heavy cut in top of valvebody being
. Science of railways . Fig. 11—Diagram, Showing Position of Piston Valve, when Settingby Using 3/16-inch Dimension from Top of Cylinder 120 LOCOMOTIVE APPLIANCES. Care should be taken in all cases to see that the top ofvalve bushing is exactly flush with top of cylinder as shownin Fig. 11. Before tightening lock nuts on valve stem, care should cEntfp U\ME OF. Fig. 12—Top View of Valve, Showing Cut in End of Valve Bod;Right Angles to Center Line of Engine Shaft at be taken to see that valve wrist pin is in line with engineshaft. This will be indicated by the heavy cut in top of valvebody being at right angles to center line of engine shaft asshown running in direction between A and B in top view ofvalve, Fig. 12. LOCOMOTIVE APPLIANCES. 121 Worm Gear Transmission Sprocket Wheel Casing FrictionClutch.—The power supplied by the 4 x 31^ Variable-speedElevator Engine is transmitted to the stoker through a specialdesign of worm gear drive, 20-1 ratio, carried by the sprocketwheel casing.
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