Do you have the book for it? I just had mine all apart to clean it and found the needle was bent, so I changed it. After I got it back together it wouldn't sew. It wouldn't pull the bobbin thread up. Got out the book and I had put the needle in the right way for another one of my machines. Have the flat side of the shank towards the left and put the needle into the clamp as far as it will go. Then tighten the thumb screw. Thread from right to left.