Mcbane

I think I figured it out. Found a broken bit of metal inside the machine that appears to be the topmost bit of part 46 in the pressure adjusting parts diagram. So looks like I have to do the replacement in the video.

Thanks for the replies. After removing the cover for better light, it is clear that the part is the "tension release bar" or part 24, 25 or 26 in the thread tension parts diagram. My thread tension release still works and I can see the tension disk get displaced when I lift the presser foot. So the tension release bar is intact but just moving around too much. At least on the Juki 1541 (a little different than the mechanics in the video), the presser foot lever seems to directly move the part that the tension release bar is interfering with, so it isn't clear how to adjust so the bar cant get out of position.

Any time I tilt my 1541 back to inspect the underside of the machine, I have a loose part that slides toward the back of the machine and interferes with raising the presser foot. The part is loose so I can use a small screwdriver or other similar tool to push it back into the hole in the casting, at which point I can once again lift the presser foot. The photo shows the part, at end of red arrow. Any idea what that part is and how to fix this? I’m wondering if anything is even supposed to be in that hole in the casting.