Geo-TH,In
Well-known Member
I'm helping friend work on his MF35, 12v gennerator, it stopped charging. I Need a refresher course. Looking at the VR diagram, it appears the VR grounds the fields to charge. Too much current, the current/voltage relay on the right picks up, installing a resistor to limit current
1. Am I right so far?
The gennerator is self exciting, requiring no voltage applied to the Armature.
2. Correct?
3. So if the VR is defective, then all I have to do is remove the field wire and short the field to ground and ammeter should show charge?
I wired this tractor about 3 months ago. It has worked up to now. I ran a ground wire to VR and Genny.
4. If I got a yes on questions 1,2 & 3, then it a good chance in need to replace VR. I've forgot how to polarize the VR.
If I got it all wrong, please give me a refresher course on trouble shooting a genny while on tractor. The brushes look good, communtator looks good, all wires look good.
Thanks,
George
1. Am I right so far?
The gennerator is self exciting, requiring no voltage applied to the Armature.
2. Correct?
3. So if the VR is defective, then all I have to do is remove the field wire and short the field to ground and ammeter should show charge?
I wired this tractor about 3 months ago. It has worked up to now. I ran a ground wire to VR and Genny.
4. If I got a yes on questions 1,2 & 3, then it a good chance in need to replace VR. I've forgot how to polarize the VR.
If I got it all wrong, please give me a refresher course on trouble shooting a genny while on tractor. The brushes look good, communtator looks good, all wires look good.
Thanks,
George