There is a TFSR manual link:
http://www.tfsr.org/publications/tec...achine_manual/ that has good info on the tensions but I don't know where you will find something exact for a clone. You do not use oil on any part of the tension. I use denatured alcohol or I use Naptha to clean. There may be some dried up oil on the pin or you may have some little part put back together in the wrong order or backwards.