As I was pulled my bobbin out to change it the whole hook assembly fell out of my machine -- I figured that was not a problem and I would take the opportunity to clean it since it was already out . . . but now I can't figure out how to align it all to get it back together. I have my manual but the photo is not clear enough for me to know how to get all the parts back in the right order. Can anyone help me??? Kathy
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Re: Hook assembly fell out of Virtuosa
Ok, take the bobbincase off the hook. Turn the handwheel so the needle is in the highest position. Run your fingernail on the edge of the hook near the point and see if you feel any burrs from the needle hitting it. If there is a burr it needs to be polished off with very fine crocus paper (hardware store) or thread will catch on it. Then fit the hook in the the small ledge (the hook race) around the edge. The hook point should be on bottom with the needle up. Then close the hookrace cover and snap it shut. Then snap in your bobbincase with the finger up in the notch.
You should be good to go.
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Hi This machine uses the standard class 15 bobbin. It sits inside a bobbin case that has a finger that needs to be located in a retaining slot. It the whole lot, bobbin, case, hook assembly and retainer have come out simply turn the machine over so that these parts can be fitted downwards. fit the hook, then the retainer and lock it into position. Put bobbin into case pull thread under spring. Lift tab on case and put it over the hook's central pin and release tab. It should now be locked in position
If you need to replace these two parts, turn the handwheel until the hook race is in the left position. Then put in the hook (thickest part down) and then the hook cover (the side with the notch towards the machine and facing up). Rotate the hook retaining arms back towards the center of the hook cover to lock it in place. Now you should be able to put the bobbin case back in. Since this is a part that needs to be oiled regularly, wipe it out with a soft cloth and put 1-2 drops of sewing machine oil at point 6 (just to the right of center) in the shuttle before you replace the hook.
You have a CB hook on your machine and this is very easy to remove and replace. In fact, you should remove the hook to clean the hook race and give it a drop of oil every few bobbins-worth of thread anyway, so if you're not doing that, your machine is probably trying to tell you something !!! I am assuming that the hook has simply dropped out of the mechanism and not that the whole hook and hook driver have come out, leaving a big hole in the hook race - if this has happened, you will need to replace the hook driver and its screw in the correct orientation, otherwise the machine timing will be out - if this is the case, you may be able to do the job yourself - contact me. Assuming it's just the hook, first-off, remove the bobbin/bobbin case from the central shaft on the hook. I am assuming the black plastic hook retainer has dropped-down and is laying on the bobbin door ... if not, you're in trouble !!! Rotate the handwheel on the machine until the needle is at the top of its travel. Look in the bobbin door at the hook race and you will see that the hook driver (a black plastic disc with a metal part curving round one edge) is positioned with the metal part on your left. Pick up the hook by the shaft and orientate it so that the metal is on the right - i.e. its a mirror to the hook driver. Carefully insert the hook into the hook race until it drops into the race itself and sits with the point downwards and a little bit of play between the hook and hook driver. It should stay there if there's a bit of oil in the hook race. You might like to use the opportunity to put one drop of Bernina oil into the hook race so that it flows into the groove that runs around the inside. Once the hook is sitting in the hook race, you only need to close the black plastic retainer onto it and press it until the lever on the left clicks into place firmly - that's probably why it dropped-out in the first place. Before putting the bobbin back in , just rotate the handwheel once to make sure nothing is binding - this will also distribute the oil if you've oiled it. Refit your bobbin/bobbin case, close the door and off you go.
Is this the top thread or your bobbin thread? The technician should have pulled out the tension disk assembly and cleaned it, not just spray more lubricant/cleaner on it. Is this a Bernina certified shop?! Take it back and get him to do it again right, it sounds like carbon/dirt build up in the disks. Have him pull the assembly apart and make sure it's not something else wrong with the disks themselves like oxidization etc.
If it's your bobbin thread.. your bobbin case is just dirty and the spring needs to be cleaned.
The thread doesn't really touch any other parts of the machine, hopefully your technician isn't using grease as this just causes more headaches for attracting more lint and then dirt.
That piece is a sweep that helps keep the hook clean. It is not necessary for the machine to use, I have thrown away many of them. If you can get your hook put back in you should be ready to go. good luck!
When you have that hook drive gear back out turn the wheel until the needlebar is in its highest position. The bar with the teeth that the gear fits onto should be all the way to the right. Now slide the hook driver gear back on. You can lay the hook back in and slowly turn the wheel. Watch that the point of the hook on its upwards stroke is coming slightly above the eye of the needle. When it does this you will be in the correct position to put the screw back on.
Hope this helps. It may take a couple of tries but you will figure it out.
First the simple solution. Make sure your needle is inserted flat side to the back and all the way up.
The only other thing I can think of is that your hook is out of time and this will take a technician to re-time it. You may need to take it in for a servicing.
Remove your needle plate, clean around it, turn the handwheel to see if the hook will catch your thread(Like you are trying to bring up the bobbin thread). If it catches okay, put the plate back on and as you tighten the screw push the plate towards the rear of the machine. Reassemble everything, rethread , insert a bobbin and try it by turning the handwheel again. If it still hits, you need a service. If it doesn't, have fun!! ssewman7
This unfortunately sounds dismally like a timing problem. When a sewing machine makes a sudden mechanical stop as when a needle is bent slightly and hits the needle plate, sometimes the other machine bits revolve along further causing the needle to be introduced into the hook either to early or to late to catch the thread.
To test this, remove the thread, the needle plate and and the bobbin case. Replace the needle with a brand new one. Yes, again. Revolve the machine by hand via the balance wheel and watch closely as the needle goes into the hook region allow it to it move down and then just start to move up. If the tip of the hook is not pretty close to right behind the needle than it is more than likely a timing problem.
If the tip of the hook is behind the needle in the scarf (the slight hollow on the back of the needle) than it is not timing. Thread the machine normally like it is and watch what happens as you manually turn the machine via the balance wheel. The thread should catch and be pulled around the hook and let go.
Try this and then either you figured it out the problem or contact me again. Either way please vote. Thanks