Technical Bench Testing Generator

I have an old Delco Remy generator taking up space on my shelf so I thought I'd take it apart because, well, why not?...I've never done this before.
I replaced the brushes that were shot and put it back together. I imagine there were probably other things that I should've checked before reassembly and fresh paint. But is there a way that I can bench test this thing before passing this on to someone else through the classifieds?

 

Put 12 volts to it for a split second (do not hold constant power) to see if it spins.

 

Power to the armature terminal, ground to the case and a jumper wire from the field terminal to ground (if it is a GM generator). It should then motor if it is good.

 

If you want to make sure this is ok before motoring it, this is my suggestion. Stand the generator on end with the pulley down, remove the com. end plate to expose the brushes and armature. Take a piece of paper and slide it between the brushes and armature by pulling the brushes back. Take an ohm meter and touch the commentator end of the armature with one of the probes, and the other probe to the armature shaft. You should read 0 ohms. Then go to the two terminals coming out of the generator housing, they are marked A and F. Touch one probe to the A terminal and one probe to the F terminal and you should read continuity. Take the probe off of one of the terminals and touch it to the housing, must be clean steel. That should not read anything. What I am trying to say is, the fields are copper and the commentator is copper and they should not short to ground. So the needle on your ohm meter should not move. When you assemble the generator, look inside the housing and find the field wire to make sure it is not touching ground when you reinstall the thrue bolts. (If the field wire touches the thru bolt or metal it would go to overcharge.) I hope this will help you.
If you want to motor it after that, you simply secure it and put a battery to the negative battery cable to the housing, which is ground, and the positive one touch to the A terminal and it should motor. Sometimes you have to take a separate jumper wire, but not often, from the field terminal to ground, and that makes it run even faster.
I hope this is not too much information. Rich

 

A good YouTube on this.