How to Thread the Kenmore 158.12270 – 158.12271 Sewing Machine Step-by-Step Threading Guide.
Learn how to thread your Kenmore Sewing Machine using this easy step-by-step tutorial.
Threading upper machine
Raise presser-foot lifter to release needle-thread tension discs.
Place spool of thread on spool pin over the spool pin felt.
Turn hand wheel toward you to raise the needle to its highest position.
Place thread on spool pin as shown with thread coming from the back of the spool.
Draw thread through the top thread guides. Holding the spool stationary with the right hand, pull the end of the thread between the tension discs as shown.
Pull the spring wire loop up and past the top hook until the thread can be slipped into the hook (See Fig. 1 ).
When the thread is released, the spring wire loop will return to position (See Fig. 2) with thread in proper place. Release spool of thread and continue to thread machine exactly as shown.
Needle must always be threaded in direction as shown in Fig. 3.
• Thread the needle from front to back, and draw about four inches of thread through eye of needle.
RAISING THE BOBBIN THREAD
Now that you have wound the bobbin and threaded the needle, you will need to raise the bobbin thread through the hole in the needle plate.
PICKING UP BOBBIN THREAD
Raise presser foot lever.
Hold needle thread loosely in left hand and rotate hand wheel toward you one complete turn.
Bring bobbin thread up by pulling upper thread.
Place threads back under presser foot.

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PDF download
You can get the complete instruction manual here.
Includes: Adjusting tensions, bobbin winding, changing needles, remove and replace bobbin case, zigzag, stitches, and much more.