I recently purchase a used ironman 210. Yesterday I was welding hot rolled steel 3/18 inch thick. All was working fine. The welder setting were 4 for volts and 40 for wire feed. Today, started to continue the project and the wire would not feed. I tried many things. The wire would start to feed at settings of 60 and higher. The drive wheel has little torque at low settings (I can stop the wheel with my hand at settings below 40 and at high settings I cant). The wire drive motor is
cool to the hand. What has changed?

I have a new torch assembly and mig wire is 0.035.

Any ideas on what is wrong would be great. Larry