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Stone Dresser Valve Grinding In Cambodia

Figure 3-21. - Stone dresser. Figure 3-22. - Valve contact correction. a 20176 grinding stone, and then ground at the bottom with a 70176 grinding stone to narrow and center the valve seat. To test the contact between the valve seat and the valve, mark lines with a soft pencil about one- fourth inch apart around the entire face of the valve.

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