The manual lists the worm gear behind the Elnagraph as an oil point. The only down side to oiling is it needs application more frequently than grease, but since there are several oil points under the lid there anyway it it's not a bother. The noise shouldn't be alarming (well, anything compared to a 201 is noisy, but the Supermatic is twice as fast).
There is a youtube video on how to take out the bobbin case, that's the one I followed. The rest you sort of poke out with scewer or tooth pick, and oil. I took of the part with two screws on the end of the free arm when I did the initial cleaning. There's a few oil points that show a bit more clearly when everything is off. I don't think there's any point to take of the hook unless something is wrong. Since then I have fould more of info on an Elna Yahoogroup, I have lots of the right type bobbins now, and I am looking for a few of the cams, some of the patterns looks very usefull. I have my eye set on a
The Elnagraph turns when the machine stitches, it doesn't disconnect under any setting, and it adds a bit to the noise. I think some of the rumble comes from the hand wheel turning. Mine quieted down a bit after I oiled the axle and brass inners of the hand wheel, though the manual sais nothing about grease or oil there at all. I don't take the hand wheel often at all (for fixing the rubber pulley, I have an aluminium version of it with rubber O-rings. It's a while since I had it up and running, I use it regularly and it behaves very well.
Last edited by Mickey2; 09-02-2016 at 01:08 PM.