You probably should take off the hand wheel to clean and regrease. Any lubrication is most likely dried up; there is a worm gear there and it needs to be checked. Much the same for the motor bearings and grease wicks, on the potted motors it can be quite a bit of work. In theory you should get by with adding grease to the grease ports, but the wicks can be clogged with old dried up grease. There luckily lots of good advice on this, tutorials on blogs and even a few videos on youtube. I have two belt driven 201s, and maybe others here could add anything useful. The 201 is my favorite.