Thanks for the reply perhaps you can tell me how to fix it. The motor runs just fine but when it winds thread the thread wants to wind mostly on one side of bobbin. If I try to move bobbin more to center of tension line up then the little arm will not engage on bobbin is one of my problems. Then other times the thread loosely winds on bobbin , like it isn’t turning fast enough even though the wheel is engaged. I checked the tension disk but does not resolve issue. I have tried moving the big wheel closer to the rubber grommet things on the spindle of the motor which helps the thread wind better but then something on the motor makes screeching noise. Which maybe too much pressure on the rubber grommet things so I back it off which takes me back to my initial problem.