Massey TE 20 Electrical charging circuit

Checked wiring and found that the D And F connections were crossed over, which has been rectified.
any ideas why over voltage, could it be the generator it self faulty or did the regulator pack it in with the D & F wires crossed.

Any help appreciated on how to test & rectify problem.

Did you take your voltage readings with a digital
multimeter ?

I always take reading on cherging system with
analog multimeter (one with needle).

Charging systems with generator brushes generates very short high voltage (milliseconds)spikes the digital multimeter has the time to
sample these short spikes and gives erratic
readings.

HTH

Bart

If something is broken the output will be less than the normal or even zero. You could also be getting 0.37 or 1.27 V. That"ll indicate a broken generator or bad connections. Or the generator could be in need of polarization (disconnect the wire from the F terminal (in the generator) and touch it (about 1 sec) with a wire coming from battery "hot" terminal (not the ground) whatever it is + or -). Now disconnect all wires from D and F (in generator) and connect them together with a wire. Connect a voltmeter (be sure to check the range so you wont burn your meter, anything above 50 V is fine) between the D and ground (check for correct polarity). Start the engine and see what the meter says. It would be somewhere between 0 and 10 V in idle. Rev the engine up slowly and the voltage should rise well above 20 volts. It might not be advisabe to run it at full throttle, though, because if the voltage rises above 20 V there will be too much arcing in the generator commutator and it won"t do any good to it. When connected, the regulator won"t let the voltage rise that high. If you have no reading or it is very low, you could try the polarization again. If that fails check the brushes. If brushes are OK, you"ll have to replace the generator. Make sure all the connections are in good shape. I don"t go into testing the regulator here since you have already replaced it.