I just finished installing the restored serve valve body on my Wayne 519. I think it is one of the nicest serve valve bodies on any visible gas pump. I also installed the positive stop mechanism. the sliding tube is working with the small crank handle. The 519 is by far the most complicated visible pump I have ever restored. There are internal parts that I never figured out how they originally worked. I have the parts diagram and know the names of the parts, but could not figure out what purpose they served.
Joe
