Problem turning the hand wheel on Kenmore sewing machine model 385.1168280?

Hello,
I am having trouble turning the hand wheel on my sewing machine. It will only go part way and the needle will not come down all the way to sew. I have taken off the inner wheel that you turn when you wind the bobbin, but when that is on, it still will just move the needle bar so far. I've checked and cleaned behind the shuttle and bobbin, but there is no thread caught there. Is it perhaps needing to be re-timed? I cannot get the large balance wheel completely off to see if thread might be caught there. My machine is Kenmore 385.1168280. Thanks much!