Friday, I finally got the tractor fixed. It's been a busy time and I haven't been out there much.
It was the fuel filter as everyone else knew but me - thanks, everyone.
But, what a bear of a job. On a TC18, the filter is located directly behind the subframe that supports the loader. It wouldn't help to remove the loader - the support frame would still be there, complicated by the hydraulic lines that run above and below the frame, the cables that rub the front of the filter, and the wiring look that rubs the back of the filter. There is about 4" of space between the frame and the filter, and no space at all in front or in back of it.
The filter was on so tight I couldn't get it loose. I finally bought a a large-capacity, narrow jaw vice grip from the advice above. It took several minutes, but I was able to just barely get a grip on the nut with the tips of the vice grips, and could move it -- maybe -- 1/4"at a time. Fortunately, once I cracked it loose, I was able to turn it by hand. It was so tight that the bracket bent and one of the hoses came off before the nut moved.
I put the new filter in place, managed to get the thing reassembled, opened the fuel cock, and it leaked! I couldn't get it tight enough. That's when I noticed the O-ring on the ground, underneath. So, all apart again, put the O-ring in place and install it again. I'm up to about 45 minutes for what should be a 45 second job!
Of course, I got air in the system and it wouldn't start. I finally got a little wrench that would fit in the tiny space around the bleeder, bled the air, and it started right up. I worked it pretty hard, pulling the box blade though some mud, with the wheels digging into the soup, to the point that it almost stalled, but didn't bog down first.
I realize that things are tight on a little tractor, but that filter is mounted on a sheet metal bracket and could have been positioned somewhere a lot more accessible. I'd like to offer the engineer a drink - laced with hemlock.
The tools I used went into the tool bag on the tractor and will stay there. It won't be as bad, next time. If the O-ring is in place /forums/images/graemlins/blush.gif the filter doesn't have to be as tight as the factory made it.