The discussion revolves around the testing and evaluation of a Denso A127 12V alternator, which was removed from a JCB wheel digger due to charging issues. Participants share their experiences and methods for bench testing the alternator, including assessments of its components such as the regulator, rectifier, rotor, and stator. The conversation includes both theoretical and practical aspects of alternator functionality.
Participants express differing views on the stator configuration, with some suggesting it is WYE while others consider it could be delta. There is no consensus on the exact nature of the alternator's issues or the best testing methods, indicating ongoing debate and exploration of ideas.
Participants mention various assumptions about the alternator's condition and functionality, but there are unresolved questions regarding the specific wiring configuration and the effectiveness of proposed testing methods. The discussion reflects a range of experiences and knowledge levels regarding alternator mechanics.
This discussion may be of interest to individuals involved in automotive repair, particularly those working with alternators, as well as hobbyists looking to understand the testing and evaluation of electrical components in vehicles.
Sadly, the little old rewind shops are getting rare these days. Since I assume a bad stator is a less common fault than, say, a bad rectifier or regulator, I may be able to find another similar unit and make two into one.Tom.G said:Yup, intermittent coil-to-coil short. Hope you can find a motor rewind or alternator repair shop nearby. It's possible to do it yourself but kinda touchy, and often hard to get the right size wire and insulating paper if used.
Please keep us updated.
Guineafowl said:It doesn't read shorted with the multimeter now, but if I squeeze the coils gently the reading will jump around a lot.