Thank you for the PDF manuals!!!
I probably haven't been clear and I was thinking that one thing caused another thing. But now I'm thinking that the oil issue has nothing to do with the electrical issue.
Saturday, I was using the backhoe and it was all normal. Then all of a sudden, while backing up for another load of dirt, it just died on me. It was in reverse, I was moving along, and then, nothing. My first thought was that there was a kill switch on the engine to stop it from destroying itself from being too hot or no oil. I've seen this on newer vehicles, but just assumed it might be on my 1998 backhoe.
Sunday morning, it fired right up. I moved it to my shop and parked it.
Monday, I cleaned the radiator, tightened the fan belt and topped it off with water. It wasn't low, but I filled up the overflow container all the way.
I then loaded one bucket of dirt, spread it and got another bucket full. I dumped it, and was about to back drag it when it died on me. I was in reverse.
If it's not the fusible link, I'm wondering if it's the forward/reverse lever. If it's in forward or reverse, it will not start and everything is dead. I never tried turning on the lights or testing anything when it wouldn't start because I left it in forward or reverse, I just put it in the neutral position, and it fired up.
If that's loose, or has become broken, that might explain why it started up on Sunday after dying. I agree that if it's a fuse, it should not have started up again on Sunday. But I'm desperate enough to imagine that maybe the fuse wasn't all the way broken and there was just enough of it left to start on Sunday and again on Monday, but then it came apart all the way. Crazy, but that's where I'm at.
The solenoid on the injector pump does not have a lever on it. To me, it looks more like a temperature sensor, or eclectic oil pressure sensor. That is the only thing that has a wire going to it. I could be wrong, and it could be a sensor. I'll look again, but I didn't see anything else that looks like a lever. My other tractors all have levers on them that move to start or stop the engine. I'm guessing that this solenoid goes in and out to turn it on and off. And that it's all internal. I might remove it to make sure. Or I'll keep looking at the manual and see if I can make sense of it.
It's raining/sleeting and maybe snowing today and the next couple of days, so I doubt that I will mess with it until the weather gets better. We are going from 80 degrees one day, to 40 the next day right now.