Delco with Internal Regulator....help

My old brain is coming completely unraveled with this advancement in age.

Of the three bolts holding down the brush holder/regulator, only one is supposed to be insulated, right? And, it should be the one setting closest to the rotor bearing?

I just took an altenator apart that wouldn't charge and it had two insulated bolts.....seems to me that there should be only one.

I took one out and now it charges really well; but did I just ground the field to full output by removing that one insulator closest to the side of the case? And in fact, the regulator is actually at fault?

My meter isn't the best in the world.

Thanks

Allan

Just found that out. I put a decent volt meter on the thing and it is charging at 16.5 volts; wayyyy to much.

Looks like it is regulator time, 'cause it won't charge at all with both those two insulated bolts in there like they should be and voltage at the three terminals checks out okay too.

I suspected that 'cause I remember being taught that to throw 'em to full charge, one would stick a small screwdriver in the "D" hole and ground the lug on the regulator (just what happened when I pulled off that insulator).

Thanks again for your help,

Allan