Working on my Bernina 730 -multiple problems!
Zigs were not zagging, needle position was frozen, the motor had thread wrapped around the pulley, the cam shaft gear is cracked and the lever on the right up top wasn't clicking into place.
It's been cleaned up and oiled and now the fun begins! I have been using penetrant and heat to work on some problem areas. The upper lever is now clicking into place. I now have the zig-zagging. The needle position dial is frozen in the center still and I have questions about that. The knob wants to move the jagged piece back and forth but there is a tiny silver nub that is stopping that from happening. When I look into the little slot in the metal that houses that nub, I think I see a spring. So my thought is that the nub is supposed to ride in and out of the slot allowing the ragged piece to move. Can anyone confirm that?
The other question is..I have accessed the motor hoping to check the brushes and clean it up but haven't found my way in. Do you think I take these tiny copper leads off and remove the gold colored pieces? The brush cases are in there. Or should this thing pull apart if I add some muscle?