FarmerBlair
Member
Hi,
I have an 1841 diesel tractor that's been sitting awhile. It has a 12 volt generator. Several years ago it just stopped turning over due to some electrical issue I couldn't solve. I replaced the solenoid back then with no effect. I originally got this just as a donor engine for another tractor. There were other priorities so it just sat till now.
So today, I tried jumping the starter directly with the battery. I connected the positive jumper to the only single large wire terminal on the starter body, then touched the negative jumper to a ground on the tractor body. There were sparks and the starter did not even try to turn or make a noise. Am I doing this wrong? I noticed afterwards that the threaded stud on the starter body (where the cable wire connects) was also in contact with the starter body via metal washers that overlapped onto the body. So maybe I should have connected the battery negative side to the starter terminal?
I thought this had to be a negative ground since its a 12v diesel, but maybe I am wrong about that. The wire from the starter runs to the solenoid. When it failed to start today, I disconnected the wire to the starter as shown in the pic. I also bent the copper stud a bit when trying to remove the nuts. I tried bending it back as best as possible. I have not tried jumping it a second time as yet.
When I could not get it to turnover years ago, I had the starter removed and checked at a starter shop and it checked out fine. Maybe there was an insulated grommet on that starter stud that I didn't re-install, I just don't remember. Obviously my electrical knowledge is embarassingly poor, so if someone might have a suggestion on what I am screwing up, I would be grateful!
Thanks
I have an 1841 diesel tractor that's been sitting awhile. It has a 12 volt generator. Several years ago it just stopped turning over due to some electrical issue I couldn't solve. I replaced the solenoid back then with no effect. I originally got this just as a donor engine for another tractor. There were other priorities so it just sat till now.
So today, I tried jumping the starter directly with the battery. I connected the positive jumper to the only single large wire terminal on the starter body, then touched the negative jumper to a ground on the tractor body. There were sparks and the starter did not even try to turn or make a noise. Am I doing this wrong? I noticed afterwards that the threaded stud on the starter body (where the cable wire connects) was also in contact with the starter body via metal washers that overlapped onto the body. So maybe I should have connected the battery negative side to the starter terminal?
I thought this had to be a negative ground since its a 12v diesel, but maybe I am wrong about that. The wire from the starter runs to the solenoid. When it failed to start today, I disconnected the wire to the starter as shown in the pic. I also bent the copper stud a bit when trying to remove the nuts. I tried bending it back as best as possible. I have not tried jumping it a second time as yet.
When I could not get it to turnover years ago, I had the starter removed and checked at a starter shop and it checked out fine. Maybe there was an insulated grommet on that starter stud that I didn't re-install, I just don't remember. Obviously my electrical knowledge is embarassingly poor, so if someone might have a suggestion on what I am screwing up, I would be grateful!
Thanks