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Re: how to replace bobbin case
First take off the needle plate and then tur n the handwheel toward you until the hook on the race is at the 1 o'clock postion then slide the bobbin case in you may have to work the handwheel back and forth to get it to slide in
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the bobbin sits in what's called the bobbin case,, the bobbin case needs to be checked to see if there is something wrong with it and if it needs to be replaced or if the hook and hook race may need to be adjusted.
Yes, it should, and you might want to download your user's manual free at the Singer website, because replacing the bobbin case is pictured there.on page 41, along with instructions.
However, I can tell you that the feed dog plate with the two screws in is DESIGNED to be removed, and must be removed to get the bobbin case back in. It's important that you follow the instructions; the case must be inserted correctly so that it does NOT move, and make sure that it sits evenly in the bobbin basket (the thing that holds the bobbin case. While you are at it, you might want to also clean the basket, using q-tips with a drop of ONLY sewing machine oil on the cotton, making sure you also get under the lip before you put the bobbin case back in.
try changing the needle to see if that helps if it doesn't,, then I suggest that the sewing machine be checked at a repair shop to see if the bobbin case needs to be replaced and to see if the hook and the hook race need to be replaced
You have two ways to adjust, 1. On the machine there is a adjustment knob..usually numbered between 1-9, set knob at 4 2. There is the bobbin case, usually metal which holds the bobbin, the bobbin sits inside this unit and there is a flat plate which the thread slides under when sitting the bobbin in case, there is a tiny screw which shouldnt be too tight but if you hold string while bobbin is in case and slightly yank the string while everything is dangling, it should only move a inch or so..ok
When you insert the bobbin case, make sure the "knub" on the bobbin case (#1) is just to the left of the position finger bracket (#2). It should sit in there nicely and you should be able to spin the hand wheel freely.
Insert the bobbin case without a bobbin to see if it will go all the way into the locked position. If it does,the bobbin case and basket are okay. Check inside the bobbin basket(where the bobbin goes) and see if there is thread or lint wrapped around the spindle the bobbin case sits on. If there is, remove it. If there isn't ,then the bobbin is probably sprung and needs to be replaced. sewman7
remove the 2 screws in the needle plate. Lift off the plate.Take out the bobbin case and examine it for rough spots or nicks. If there are any it will be necessary to buff them with an emery stick or fine sandpaper. Once the rough spot has has been smoothed, buff it with some very fine steel wool. There must be no rough spots on this bobbin case.Clean all the lint from inside the hook area. Do not pull the wick from the center of the hook. Place the bobbin case in the hook area so that it sits flush and does not bind when the handwheel is turned.Reinstall the needle plate, thread the machine, insert the bobbin and turn the wheel to pick up the bobbin thread and see that it doesn't bind.Test sew