Here is how the mod went. Let me say do not wear anything that you do not want to get diesel fuel on. This was a messy operation. Nitrile or latex industrial gloves will be helpful, but you may well get fuel up to your armpit and splashed onto your jeans and boots. Some sort of light like a flashlight really helps to see what is going on.
Our 5555 had braided stainless steel line leading from the petcock banjo, which simplified things. My suggestion is to start by cutting the line with a fine hacksaw and plugging it off with a golf tee or some such. Then you have plenty of time to trim off some line to make room for the new inline filter. In our case, about four inches.
Of course, we did it backwards which complicated the procedure. While the line is cut, it would be an opportunity to use the cut line to drain and direct the fuel from the tank into containers if so inclined. Otherwise it will splatter everywhere. We had just topped off our tank so we resorted to Plan B.
With a helper, moi, to hold the line for cutting, put a gloved finger over the hole and juggle the flahslight, we left the fuel in the tank. There is not much room for one person much less two. I wedged myself standing inside the left rear wheel and reached under the hood with my right hand. Having three or four hands to cut hose and remove the banjo fitting and then the fuel filter fitting and plug the drain seemed essential.
Much splatter ensued. Take care to not lose the copper washers on the fittings. We had a catch tub under the tractor which proved very helpful catching spilled fuel and dropped washers. In a perfect world, new copper washers should be installed.
While we had everything removed, I used the opportunity to take the fuel cap off the tank and removed my finger to allow one or two gallons of fuel to gush freely out of the tank flushing out any more crud that might be lurking in the bowels of the beast.
Here is the tiny internal fuel filter. The poor little thing was totally crudded up and the big Mahindra sucked on it so hard that it collapsed.
Victory is ours! Our beautiful, new, inline, visible fuel filter.
Thank you, Justin, at Collins Tractor and Equipment in Crockett, Texas