I am fixing it for a customer, looking for parts . No voltage regulator? The brush holder has a bad diode, one of four is not good. Then there is a bridge rectifies that is bad too, are these parts available, a part # and who to get them from. I live in North Wisconsin. Close to Duluth Mn, 100 miles and will be going there in a week to do some selling. serial # 1871147 Thanks Craig