SOURCE: Kenmore Sewing Machine model # c877.15
I have an old Kenmore and here are the directions from my manual: 1. Draw thread from spool through bobbin winder tension discs. 2. Wind thread around an empty bobbin several times. 3. Place bobbin onto bobbin winder shaft with thread coming from rear of bobbin. Push bobbin winder latch against bobbin until it clicks. 4. Release clutch by turning clutch knob toward you. Start machine.
SOURCE: instructions for theading a Sears Kenmore Sewing machine model 158.14000
all machines thread the same. TTN tension,take up, needle.
Beginning
with the spool, guide the thread through the thread guides to the
tension assembly. Pull the thread through the tension assembly and test
it to make sure the tension is working correctly.
(To do this
test,adjust your tension setting to normal or medium or 5 or something
in the middle. Raise the presser foot and pull the thread through the
tension. It should pull easily!! Lower the presser foot and pull the
thread. It should pull noticeably harder.) If it passes this test,
continue up through the take up lever,then down through the thread
guides to the needle. Make sure your needle is fully inserted and
turned the correct way.( If you load your bobbin case from the left
side,the needle rule is normally FLAT to the RIGHT is RIGHT. There are
some exceptions. If you have a newer style drop in bobbin or your
bobbin case loads in the front then the rule is FLAT to the BACK.
To wind the bobbin, guide the thread around the thread guide on
the left top of your machine, then to the bobbin winder. Wind the thread around the bobbin several times, place the bobbin on top of the bobbin winder, push it against the wheel and press the foot pedal. It should stop winding when the bobbin is full or you take your foot off the control
Sewman7
SOURCE: Bobbin thread bunching
Check between the tension disc, sometimes you can get a piece of thread caught in that and it prevents it from tightening down and making a good stitch. Also, make sure that your presser foot is in the up position when you thread your machine.
SOURCE: Thread is not coming up
YOUR PROBLEM IS THE TIMMING IN YOUR MACHINE. THIS HAPPENDS WHEN YOU FORCE YOUR MACHINE TO SEW SOMETHING OR WHEN YOUR NEEDLE BRAKES. nOT SURE HOW TO FIX IT. I HAVE THE SAME PROBLEM. USUALLY A TUNE-UP WOULD DO IT. IT'S ABOUT $99 TO $130.00 TO DO A TUNE UP. i WISH I KNEW HOW TO FIX IT MYSELF.
SOURCE: I have a Kenmore 14 stitch sewing machine that I
take out the thread and bobbin. run the machine with the pressure foot up and watch the feed dogs (toothy things under the pressure foot that move the material through the machine). if they are not rising up above the plate, then you are sewing multiple stitches in one place and that's what spools up the threads. take the plate over the feed dogs off (it just pops up). get someone to remove the two screws holding the feed dog on (it's a torx #10). the piece the feed dogs was screwed to rides up and down on a short piece of polished rod under it. the rod has gummed up to its bearing. bright light, look for this and get some oil (3in1) on the rod above the bearing and force the feed dog mount up and down until it frees up.
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