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Faunsdale, AL | I think the small black 'relay' that is shown in the first picture is a circuit breaker instead. The later tractors and some conversions have a separate starter relay to take the load off the ignition switch, We have one tractor with one from the factory (12 volt tractor) and one I converted that doesn't have one. I have had more trouble from those relays than the ignition switch they are supposed to help out. I may have a later model (4430 etc) ignition switch in the tractor without the relay instead of the old flat back switch it came with.
I believe the small black circuit breakers were originally installed in the feed wires (blue and brown according to one diagram I found online) from 24 volt regulator to the electrical loads on the tractor. I believe there were short jumpers from the circuit breaker terminals where the regulator wires connected on over to the starter solenoid connections to charge the batteries. On the other hand, they might have had the battery charge current runnning through the circuit breaker as well to protect the regulator and generator from over current, it's been a long time since I worked on one that hadn't been hacked up and I can't find a diagram online with the circuit breakers shown.
If that circuit breaker is still carrying current, I would use it to protect the tractor ignition switch/electrical load wiring and let the charge current from the new alternator go straight to the battery positive cable terminal on the starter solenoid. A fuse link or two might be a good idea between the circuit breaker terminal and the starter solenoid in place of the jumper wire. | |
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24 volt generator / 12 volt batteries question
