Bobbin and shuttle case pop out of machine .

Depends on the Singer model. Try searching the internet for:

Make Model bobbin
Make Model bobbin case


Amazon com SHUTTLE BOBBIN CASE FOR SINGER 27 28 127 128 TREADLE SEWING...

Treadle Vintage Parts

Singer Treadle Long Shuttle Bobbins 5 Pack

New vs shuttle bobbin case for singer 27 28 127 128 treadle sewing machine...

try another bobbin, that one might be warped
use a can of computer air in the bobbin area for lint
if the problem persists then the machine should be checked

try a new needle
make sure the bobbin is turned in the bobbin case correctly

the sewing machine may need a new bobbin case,, but I would
suggest take the sewing machine to a repair shop to see if there
is something wrong with the hook & hook race,,that may be why
the bobbin case is coming out.

The link shows a photo of the bobbin assembly. Its sounds like youve left the latches open that secures the assembly.


http://sewingmachine221sale.bizland.com/store/page40.html

The bobbin case is not in the shuttle.

Raise the needle to it's highest position.

Lift the lever on the back of the bobbin case and hold it open as you insert the case into the shuttle; arm on the case pointing up. You may have to turn a bit to the left or right - it will click when in place.

Inserting bobbin into the bobbin case or problem inserting bobbin case into the shuttle?

Make sure the thread will feed from the bobbin clockwise and through the guide on the bobbin case.

Lift the lever on the bobbin case to hold the bobbin in place as you inset the bobbin case into the shuttle.

If the bobbin case for this machine as a "finger", this has to align with the opening in the shuttle.

If you cannot readily see this - move the bobbin case a bit to the left and right until it clicks into place.

sounds like it needs a service call. if you do not have a sewing repair man you use regularly to clean machine the local fabric store should know who you could call.

Sorry to say but one of your steps is incorrect. Look at it again, take a deep breath and gom
over everything slooowly. If this really doesn't work then Im afraid it's a technician you need :) .

1. Remove the bobbin case
2. Release the clutch by pulling out the handwheel
3. Draw the thread from the spool andguide the thread throught the hole in the bobbin from the inside to the outside
4. Put the bobbin on the bobbin spindle
5. Push the bobbin to the right
6. Hold the free end of the thread and depress the foot control, wind until full
7. Push the handwheel in (to wngage the clutch)
8. Push the bobbin spindle back tot he left to resume sewing mode.
9. Place the bobbin in the bobbin case (thread should feed clockwise)
10. Draw the thread through the slot in the bobbin case
11. Continue to draw the thread under the tension spring and through the opening Pull out about 4"' of thread
12. Holding the latch open position the bobbin case into the shuttle and release the latch
13. Case should lock into place when released

Hope this helps!

Bonnie