I've had the 1968 JD 3020 gas synchro shown in the video for about 12 years. She can be a pain in the butt to get running sometimes, but once she is running, she's a happy tractor. It has a completely rebuilt synchro transmission with virtually no miles on it, and a nice little FEL. I use it sparingly for yard work and moving the odd bale.
Right after this video, which was taken when I started her up for the 2019 spring season, I drove it around the yard a few times, pretty happy with myself for getting her running for another year. Parked it in the quonset, went to mow some grass, and noticed smoke coming out of the quonset. Wires had shorted and were white hot fried, wrecking the wiring harness and god knows what else. I pulled the wires off the battery to stop the smoking wires and thankfully nothing burned down. Haven't had time to take it apart and look at it, but dreading the costs of buying a new wiring harness and installing it, and not sure if anything else is damaged to boot.
So, I have two questions:
1) Anyone have any experience with this kind of thing? Tips, suggestions to start?
2) The one thing I note with my tractor is that it is 12v negative ground, but it has the regulator - it hasn't been upgraded to an alternator. I have the reprinted service manual for it, but cannot find a wiring schematic that shows a negative ground for a gas. Most everything I have read or read about online is about positive ground tractors, unless they have been upgraded. Anyone help me with this?
Green sweater - green tractor