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Tune-up Guide
158 series
Sewconsult.com 2002
Div. Sewing Educational Warehouse

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Summary of Contents for Kenmore 158 Series

  • Page 1 Tune-up Guide 158 series Sewconsult.com 2002 Div. Sewing Educational Warehouse...
  • Page 3 Tuning up your machine There are three main points to a tune-up on a sewing machine. -Cleaning and oiling -Hook and feed timing -Internal tension adjustment Start by removing the covers on your machine. DO NOT START ANY REPAIRS WITH OUT UNPLUGGING THE MACHINE FROM THE WALL OUTLET Remove the screws on the top cover.
  • Page 5 Removing covers continued Remove the screws on the bottom covers for open arm machines. Fig. A. locating all of the screws may be tricky but when they are all removed the covers should come off easily. Remove the covers and check for thread or lint caught in any parts.
  • Page 7 Cleaning and lubrication The best way to remove lint from the machine is with compressed air. Blow all the lint from the machine. Remove all lint from the gears and again from the bobbin area and feed dogs. When oiling your machine, make sure you use a good quality oiler and clear sewing machine oil.
  • Page 9 Cleaning and oiling continued Oil the main parts shown and oil the bobbin winder. Be sure to remove excess oil from the winder before you run it. (bobbin winder is on the top cover on some models) Fig. next page. Clean all lint from the hook race.
  • Page 11 Checking timings Insert a new needle into the machine. Turn the hand wheel towards you until it is in the lowest position. Set the machine to right needle position (or zigzag right side). Bring the needle bar up until the hook and needle meet on the right side.
  • Page 12 Adjusting timing Loosen the screw as shown. Some models have a 5 sided nut which requires a special tool available through Sears. Carefully turn the hook until the needle and hook meet. Make sure the feed dogs are in the down position when the hook and needle meet.
  • Page 13 Adjusting the tensions The bobbin tension on your machine should not be too tight. When pulling the thread from the bobbin case you should feel a good amount of tension but not enough so you have to pull hard. When adjusting move the screw ¼ turn at a time and recheck the tension.
  • Page 14 The parts inside the outer dial are shown in order. Replace them as shown then replace the outer dial onto the tension stud with the red line at 4.5. This will give you the best range of adjustment once the dial is back together.
  • Page 15 The tension you are trying to get is for the knot to form in the center of the fabric. When the tension is where you want it, replace the covers. The outside of the machine can be cleaned off with a soft cloth and mild cleaner.
  • Page 16 Also make sure you use good quality needles. Organ brand which can be found under the Kenmore name are best for your machine. Thread quality and the type of thread being used can be a problem.
  • Page 17: Upper Thread Breaks

    2. The needle is blunt or bent. Your needle should be changed before each large project or if it hits the needle plate or hook. A damaged needle can also snag most fabrics. 3. The tension is not correct. In most cases the top tension is set to a medium number for regular sewing.
  • Page 18 3. Make sure the top tension is not too tight. 4. Check the needle plate for damage. 5. Check the hook for damage. LOWER THREAD BREAKS 1. Make sure the bobbin is inserted correctly and the right bobbin for your machine is being used. 15 class bobbins metal or plastic can be used in your machine.
  • Page 19: Skipping Stitches

    2. Check threading of the machine. If the take-up lever is not threaded properly the thread will not come up. 3. Hook timing may be out. The hook must pick up the thread from the scarf of the needle. STITCH LENGTH VARIES OR WILL NOT FEED 1.
  • Page 20 Notes...
  • Page 21 Additional Service Information Sec. A Pressure bar height Sec. B Needle bar height Sec. C Needle distribution Sec. D Needle position Sec. E Feed dog height Sec. F Zero feed Sec. G Shuttle timing Sec. H Zigzag Sec. I Straight stitch Sec.