I just purchased a TO-30. I gave it a tune up, oil change and flush, points, plugs and wires. I had a Farmer/ tractor mechanic help me set up the new distributor parts, he found that the tractor is wired for a negative ground rather than the required positive ground. The ammeter works, the generator is charging and she runs great except for a slight popping at the end of the horizontal exhaust pipe. He was really confused with the wiring negative ground, any thoughts on this. June 30, 2014
Yep, your TO-30 should be wired so the POSITIVE battery terminal is connected to ground. If someone has connected the negative battery terminal to ground you need to need to change the battery connections so the POSITIVE terminal is connected to ground and do the following before trying to start it again:
1. Make sure the wire to the negative terminal on the ignition coil is connected to the key switch;
2. Make sure the wire to the positive terminal on the ignition coil is connected to the distributor;
3.Check the rest of the wiring to make sure it is as shown in the following link: http://fergusontractors.org/nfs/wp-content/uploads/electrical/TO-30-6V.pdf;
4. Polarize the generator as described in the following link. http://fergusontractors.org/nfs/wp-content/uploads/technical-articles/Polarizing-a-Generator.pdf.
Your tractor should now be reset to positive ground and work the way it is supposed t0.