Quick fix (maybe)..
I had a leak in the same location, :wack: but never had any time to drop the trains. I'm still not sure if it has to be dropped for sure. Anyways, I removed all the rods/levers etc and only had about 4 - 5" to work with. I got a 3/4 or 7/8 socket and put over the top so it was just slighty inside of the seal area. I lightly taped down on the socket in the 2" area I had left to work in. After this the seal didn't leak for about a year. You can maybe feel with your finger if the sector area has lifted up a bit. :salut: