I recently did take the hand wheel off my new to me 301 and it was caked with dried up gunk that took a long time and several products and picks to get it all off. It was hard to get off, and I could see why. But with everyone's help and encouragement (thanks everyone!) I kept at it and put it back on the right way with some Tri Flow and gave it some time and use and now it is more quiet and hums along. But, it was a challenge to get the wheel off at first. I am still very much of a novice but it is so satisfying to get something apart, cleaned and back together where it works!!