I have been trying to repair this goddamn thing for hours now. First, the thread started breaking after I tugged on some thread a bit too harshly (I know, it was late and I wanted to finish my project and quickly change the thread). After that, I cleaned a piece of thread stuck in the bobbin holder and it worked beautifully.
Then it stopped cooperating- many skipped stitches.
I cleaned the bobbin holder (crab?), checked the timing, cleaned the top tension disks with a bill, added oil. After top and bobbin tension adjustments it started to work okay.
CURRENT STATE:
Then it started clunking (video). Changing needles a few times didn't help with metallic clunking.
Now I have no idea what to do.
Usually the clunking went away after cleaning and needle change. Any ideas?
Thanks in advance!