Be very cautious about firing up your 628 at full speed before you know whether it has plastic gears or metal gears in it. I bought a 628 in a beautiful condition at a neighborhood garage sale. I plugged it in and it sewed beautifully for about 6 inches. Then all hell broke loose because the old plastic gears shattered! I found out that this is a very difficult problem to solve. Some 628's have metal gears however and if you have one of those it will not give you this problem. Try to determine in advance of running it whether you have metal or plastic. The older ones have the metal gears. I was so disappointed that this machine was ruined by just running it. Fortunately it came in a very attractive cabinet which I was able to use with a 301 by just purchasing an inexpensive "cradle" attachment for the 301 to set in. I hope you get your machine running safely for you.