OCR Text |
Show Short Cut When Pitted Valve Requires Grinding In cases where a badly pitted valve requires grinding, here is a short-cut. Cut a piece of emery cloth in dimensions dimen-sions a little bit wider than the valve seating and twice as long and then double it over so that both surfaces are cutting surfaces. Next cut a hole in the cloth so that the valve stem may be passed through and the emery em-ery cloth brought close up against the valve head. The valve is then placed in position for grinding under comparatively com-paratively high pressure. Both sides or the emery cloth will conform to the valve head and the seating and If the valve turns and the emery cloth remains re-mains stationary, the valve will be ground on the upper emery, whereas if the cloth revolves, the valve seating seat-ing will be ground on the lower emery. |