I have been considering this service as well on my 3100. Question:
My steering box has the side cover; but I've noticed that on the bottom, it has what looks like a large 2" nut with a slot in the middle that looks like its for a large flat screwdriver. Does this unscrew? I would need to use my pipe wrench on it, but not sure I can squeeze in that small area. I would like to do a flush; jack up the front end, several fills/turns/flushes with diesel, and then a tube of new Chevron 00 grease that I got from a fellow Stovebolter here. Any suggestions?