Piece where the bobbin goes came out, how do I put it back in. I can't find my manuel to see a picture.

It sounds like you need to put in the bobbin basket. These are held in place with a latch on the left rear. You turn them with a screwdriver. The latch goes above the edge of the bobbin basket when properly seated in the grove it rests in.

look at the slot the bobbin goes into. you will see a slot that the arm on the bobbin fits into. you need to let the lock lever on the bobbin lock into position.

contact singer customer service, they do have free manuals

I assume you actually mean the metal ring that holds the small round case that the bobbin itself sits in. There are usually two arms that swing in to hold that larger metal ring in place and then there is a plastic and metal piece that sit behind the large metal ring. fit the plastic piece that may look somewhat like a scoop next to the metal piece that usually has the post the the bobbin fits onto and has a quite sharp tooth on it. The metal ring then goes on to hold those two pieces in place and the two arms swing in to hold the metal ring into place. The bobbin or bobbin case now can be put back in. Hint on metal ring placement: they almost always have a notch that goes at the very top where the arm on the bobbin case sits in when it is in place. You may find it easiest to do this with the machine laying on its back so you don't have to have 4 hands to hold everything in place while putting everything back in.
Good luck!

I e been trying to thread a toyota zigline auto 22 and the thread on the need and the bobbin keep getting caught up on the inside where the bobbin goes... I noticed the metal hook piece the bobbin clicks into keeps catching on the hook part then wraps around the bobbin holder then unwraps and knots up. Please help

they are not an expensive item i sugest buying a new one and save a lot of time and get back to your sewing quicker

Put the needle in the up position. Tilt the machine back with one hand and lay the hook in its position on what is called the hookrace. The little ledge inside the the circle opposite the other part that moves. Then take the outer ring and lay that in over top of it. There is a small pin on the bottom that fits into a notch. The two small nubs should be on the outside, then click the two black knobs over those. Put the bobbin in the case and the thread through the notch up under the tension spring on the case. Looking at the back of the case, pull the thread and in most machines the bobbin should turn clock-wise. Now snap it onto the post.
Your good to go.
Good luck.

I'm having a similar problem today. I took out the bobbin case and when I went to put it back in, the whole system locks up. I've tired cleaning, changing needle taking the metal plate and piece that holds bobbin case out and put it all back in after cleaning. Nothing. My symptom is I can't get a complete stitch, the needle goes down, the whole deal acts like it will work and as soon as the arm of the bobbin case gets to 8 o' clock on the gears, It jams and won't hardly move. I cannot pull the bobbin case out easily after this. Perhaps there is someone out there that can help us!

There is one small metal piece 3/4 inch long and shaped like the letter "T" that fits under the right hand needle plate snap one screw. Attach to underneath square nut and can be seen sticking out from the top holding the bobbincase in place after the top plate is replaced and everything is back together. If this is not it, a picture would help as I have repair 100's of Elna 5000 to 9000's.
SewTech

The machine is relatively simple to thread. This is what I do and I've had no threading problems. 1. Put thread spool on the spool pin and put spool guard over spool pin to hold spool onto pin. 2. Take thread and put it under the bent tab by the circle tensioner. bring the thread around the right side of the circle tensioner and bring around the front of the circle tensioner thing back to the top hook on the far left side of the machine. 3. Take the thread around the backside of the top hook think until it threads through the flat piece on the left side of it. 4. Bring the thread down through the first (right side) channel and under the plastic piece to the second (left side) channel. 5. Bring the thread up the second channel and around the moving thread holder and past it's flat metal piece to hold it. 6. Tuck the thread around the small wire thread holder below the needle screw. This may take a few passes to catch it. 7. Thread the needle from the front and run the thread between the teeth of the presser foot. 8. Put a bobbin in the bobbin case so that the thread pulls off the bobbin from the left side of the bobbin if you look at it from above. 9. There is a small channel in the bobbin case that is covered by the bobbin tension flat piece. Pull the bobbin thread through this channel and into the empty space where the needle thread will catch. 10. Place the bobbin case into the machine with the little set bobbin arm pointed to the sky so that it fits into the machine without wiggling to the right or the left. 11. Turn the, uhhh brain fart, the hand wheel until the needle comes back up with the bobbin thread hooked over the needle thread. Take a narrow thing, like scissors or a seam ripper and pull both threads until the bobbin thread comes up. Now your machine is threaded. Use these directions with the pictures in the book to get this machine threaded.