The discussion centers on the static testing of a Denso A127 alternator, previously removed from a JCB wheel digger due to charging issues. Key tests included checking the regulator, rectifier, rotor, and stator, with findings indicating that the alternator is likely functional despite some dirt on the slip rings. The participants suggest further dynamic testing on a tractor or connecting it to a motor to verify output voltage and current. The conversation also touches on the configuration of the stator windings, with indications that it may be delta-configured.
PREREQUISITESAutomotive technicians, DIY enthusiasts, and anyone involved in the repair or testing of alternators, particularly those working with Denso models.
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.