Bobbin case came out of my singer 9323 and I dont

The owner's manual should have instructions.

Also search for some videos on YouTube:

Bobbin case seating 2

Inserting Bobbin Top Drop In

Fixing Top Load Bobbin

...

I believe that is top loading Apollo bobbin case if so, facing the front of the machine underneath bobbin cover/door there should be a bracket on the left (holds bobbin case) move it back, set case in with the cut out pointing to the back of the machine, you may have to wiggle it a bit until you feel it is seated the move the bracket back over the bobbin case

Customer Support ,,,,,,,

Singer website has many manuals available as pdfs including yours, oiling is shown in this image after you remove the hook race cover and hook. Most front loading bobbin design machines are like this.
http://www.singerco.com/uploads/download/438_3116.pdf

Is this a front loading bobbin or top? If it is a vertical front loader with the little metal bobbin case, the metal case has to be lined up and snapped firmly into place. You should hear it snap and lock into place.

If it\'s a horizontal or top loading bobbin, and the plastic bobbin "tray" is rotating, then it may not have been nested in properly, before replacing the plate, or may be "jagged" somewhere... If there is a burr on the casing, or as in the case of one machine I worked on, still have a piece of needle stuck in it, the thread will snag on it before it finishes rotating and the rotating motion catches half way and will jerk the case right around and the next stitch will break the new needle.. Those plastic bobbin "trays" are usually easy to find and replace if they have become too burred to use. I have also sanded them smooth again as well though.

To test it, unplug the machine, thread your machine on top, but leave off your bobbin lid and leave out your bobbin, hold the top thread (like when you are about to crank to pull up a bobbin loop) and hand crank toward you, or counter-clockwise one complete rotation. Watch to see if the top thread is caught by the rotation hook and slips all the way around and back over the top of the bobbin tray, or if it snags on it somewhere.... Good luck!

try taking the bobbin out and putting it back in the bobbin
case if it's a top loading bobbin
if it's a side or front loading bobbin make sure the bobbin case is
inserted correctly
if the bobbin and bobbin case are inserted correctly then
it sounds like the sewing machine could have a timing
problem and needs to be checked at a sewing machine shop

is this a top or front or side loading bobbin case?

You need a Singer Class 66 plastic bobbin for that machine.

The plastic bobbin case should sit on top of the raceway, it should slot in quite easily, once the bobbin case is in put the small metal clip at the top over to hold it in place.

Bobbins are specific to machines.........if you are trying to use a non-singer bobbin, the diametre and depth may well be several millimetres different and will result in what you describe.

Ask for plastic singer bobbins for a top loader......if you contact Singer or an agent, they will give you a part number and will probably ship to you as well.........get a few and have all your colours ready, not all layered on just a couple !

Bargain Box