fulltimer01, welcome to irv2
I'am not a member also went to site and there topic discussed it but no pics. On the valve the zerk fitting would be installed on the wide part where the blade travels inside valve they use vasoline as grease because its thin and will flow down thru blade. I have three dump tanks and the rear one is tight to pull for dump may give this a try. They mentioned useing small zerk fittings with teflon tape.
Take a look at Househusbands pics above, on Dancincampers post, you will like.