My 89 318 developed a steering column leak today while mowing. It is coming from the forward face of the column and was wondering how serious of a repair this is going to be. The tractor has 1750 hrs and if it can go wrong with it, it will go wrong. I looked in my tech manual and they talk about a full rebuild, which I am capable of, but not real enthused about doing. Could this just be an exterior seal that blew and needs replaced, or does it have to be done complete from top to bottom?