After a lot of trying and asking I found out you can only use a single diode rectifier..MCC 50v 6A Current Blocking Rectifier Diode I talk to a guy that recommended a capacitor between the brushes to help make it run smoother.. and it did, but I did not like to have to put it under the pump ..So after a little more research I found out you can use these 1N58824 Diode Schottky Barrier rectifier 30v 5A I used these alone and it runs perfect! with out a capacitor as the orgianl Lionel handcar did not have one...
So if you ever want to fix your original 65 Lionel handcar this will work....DANiel