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REPAIR valve gear. Grinding valve job facets

Grinding the working facets of valves should be made to correct the eccentricity, resulting in the valve when the engine is running, and to eliminate the wear and damage on the conical surface of the chamfer. When sanding is necessary to take a minimum layer of metal, in order to bring only the blackness, shells and the beating, available on the bevel valve. If the bevel found cracked or badly warped the head itself, the valve rejected. When sanding to make sure that Bevel did not leave on the cutting edge and always remained a cylindrical a belt of at least 0.5 mm. When checking the valve is placed on the beats of the prism 2, mounted on a plate, so that the end of it rested on the ball 4 uglovogoupora seamed to the body 5. Two indicators 6 and 7, fixed in holders 3, sum measuring rod tip to the valve and its bevel rod. Turn the valve, the indicator will show a run-out Working bevel and the other - the beating of the rod. permissible runout chamfer noxtexceeding 0.02 mm rod - 0.02 mm.
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