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16. Remove the hex wrench and re-install the#10-24 <br /> inspection port screw with an o-ring seal attached. <br /> Torque the screw to 20-25 in. lbs. <br /> 17. From the end of the drop tube's top flange, <br /> illuminate the internal valve flapper with a flashlight <br /> and visually inspect the deflector attached to the <br /> valve flapper.There should be no visible damage <br /> to this deflector. The deflector's shape should be <br /> uniform and similar to that of Figure J. If damage <br /> is observed, the valve will not operate as designed <br /> and must be replaced. <br /> Figure J <br /> 18.After completing these inspection steps, recheck <br /> the floats and linkage as detailed in Steps 8& 9. <br /> Using care not to damage the floats or the float <br /> guide, reinstall the drop tube assembly into the <br /> tank riser. <br /> 12 <br />