Kelunaboy, I will try to explain, but pictures would be helpful. I used a 2" abrasive pad, (3m) on a air powered angle die-grinder . I used an accessory transformer attached to the roller pick-up and the frame. Flipped the loco on its back and secured gently in a vise. Here is the key to success, With voltage applied, I chose 14 volts, using light pressure on 1 drive wheel while pulling the trigger on the die grinder apply light to medium pressure on the wheels surface while watching the ribs disappear, at the same time you should count at about once a second. When all of the ribs disappear stop the grinder and keep track of the number you counted to. Use this number to count to on the next wheel and so on until all the ribs are gone from all 4 wheels. If you keep a good count all 4 wheels will be nearly the same and the loco will operate smoothly and quietly without wobble. I've done it 3 times with success. 
Attachments
Images (2)
