Cleaning The Bobbin Winder Clutch on a Bernina 830 Record

On this machine, you'll need to remove a couple screws from the bottom before you can get to the clutch.  Lay the machine face down on a thick towel.  If it has the plastic shield across the bottom, remove the screw and take the plastic shield off. 
 

Directly below the handwheel, on the bottom of the machine is another long screw.  Remove that screw, and the end panel will come off.  

Next, you need an Allen wrench, size 5/32 or 4mm.  There’s a black screw that the Allen wrench will fit into, just above the pulley.  Turn it to the left, just enough to release the tension on the pulley.  

Now you can take the handwheel off.  Loosen the little screw on the center knob. 

 Unwind the knob and take it off. 

Remove the metal ring.   

Lift up on the pulley as you remove the handwheel.  




Spray a little WD-40 on a rag and clean inside the handwheel center hole.  Spray some on the shaft that the handwheel goes onto, and clean it off with a rag.  It may take 2 applications if it’s really frozen up.  Make sure all the WD-40 is removed, then put about 3 drops of sewing machine oil on the shaft. 

Put the belt onto the handwheel and make sure the belt is also seated in the inside groove of the pulley, then push the handwheel back on.  

Replace the metal ring with the nubs facing outward.  You have 3 positions that the ring can go on.  You’ll know you’ve got the right one, when the clutch will release, but it will also hold it locked for sewing.  You have to have the center knob all the way on before you can check.