Wright-Martin Aircraft Corporation, New Brunswick, N.J · New Brunswick, N.J., Wright-Martin Aircraft Corporation · leaf 120
should. Under ordinaryconditions these should not need replacing after 50hours of running. The valve tappets 11972 should be examined forexcessive wear and renewed if found necessary. The valve guides and valves should be examined;if excessive wear is found in the guides, or the valves(particularly… … Plate 48Grinding Valves. better than a newly fitted valve. The reason for thisbeing that, the old valve has had all the strains removedin the steel due to the heat under which it is subjectedwhile being pounded on its seat. An old valve whenproperly reground will hold its seat and will not…
Airplanes
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