I will be getting the roller and arm together and it looks identical to the 244 setup. I'll get some pics of the process for future diy'ers. Spent a few hours on your site last night. I'm not worthy.
Uh, then it will be pretty simple. You just remove c-clip, holding the arm/roller assembly on the shaft (or pin?) and slide it up/off. Make note on how exactly the pressure spring is placed before taking it off.
Again, if the face-cover is still on the way after you remove that small plate, then you have to suffer through removing the screws and the face-cover.
Note. - I don't think you need to remove all the knobs though, as I did with 244 on the pics, I did it because I was going into "dipper clening" anyway . I think you only need to remove the fader's sliders knobs, but I am not sure about that. Good luck. Post a note later about how it is going
Don't know if this will help/is needed, but if you want to know if the pinch roller assembly is the same between the 244 and 246 you can place a quick call to Teac parts and ask them if they are the same. (323) 727-4840.