I can't get the bottom plate off my Kenmore Convertible model 1981 sewing machine. I took the required screws out and the plate won't come off so I can oil the machine. Help!!

The Kenmore 158.1787180 uses a low shank sewing machine foot. See some of the parts here: https://www.sewingpartsonline.com/kenmore-158-1787180-sewing-machine-parts.aspx?index=1 . As long as you get the correct shank height, most presser feet are universal. You can also get the snap-on feet and an appropriate shank to snap-on foot universal adapter. (Some button-hole feet need to plug into the sewing machine, for example.)

It can be hard to measure the shank on presser feet. You need the distance from the bottom of the foot to the bottom of the screw opening. See https://www.anniescatalog.com/pages/which_foot.html . I've found calipers are better then most tape measures for this. (If you measure to the absolute center of the screw, then you add 1/4".)

I hope this helps.

Cindy Wells

I wish i had an answer for you, but I have the exact same problem with my 158-17800. Were you able to locate the correct monogram attachment for it?

1. Slide the front plate towards you. (Don't remove)
2. Lower feed dogs by rotating the hand wheel.
3. Raise the pressure foot or totally remove.
4. Remove the plate under the feed dogs.
5. If you remove the front plate it can be replaced at an angle. (Flat like paper) There are springs under the plate that must catch under the main frame of the sewing machine. Twist the plate until straight and push into position.

it's possible that there is a part inside the machine that could be broken, it would be a good idea to have the machine checked.

To oil, remove bottom plate. Don't lose screws! Oil only moving parts with one drp good quality sewing machine oil, but before you do --remove thread

You can remove screws bottom plate, however, unless you are mechanically inclined, I would take in for service. Lay machine back on soft cloth or old towel. Don't lose screws! Oil moving parts one drop good quality sewing machine only and use Singrr lubricant on gears. If you don't have oil or lubricant, you can blow hair dryer 1-2 minutes and put plate back on. Never oil or lubricate plastic parts! One drop oil on shuttle hook, Run scrap to distrubute oil before sewing on project fabric ! Jimmy

have you tried any of these sites

sewingpartsonline.com
sewvacdoctor.com
whitesewingcenter.com
sewingpartsdirect.com
sewingwarehouse.com
sewforless.com

Hello

Load your Kenmore sewing machine with the right thread and bobbin thread for your project. If you use the wrong weight thread for your fabric or severely uneven weights of thread, this can cause the appearance of a tension problem when it is, in fact, a thread weight problem or a problem with your sewing speed. If you go too fast, you will break the thread. If you go too slow, you can cause loops. Uneven pressure can cause stitches to vary greatly.

Test your Kenmore sewing machine's tension by sewing on a piece of scrap fabric. If your tension is way off, then test on some basic cotton or a firm blend simply to get your tension right. Do not try to start adjusting your tension on silk or leather. Get a base adjustment on a more standard fabric first.

Look at the top threads and bottoms threads. If the tension is off on one side, it will usually affect the other side slightly. So select the side that looks more maladjusted to start adjusting the tension.

If the top thread is too loose or too tight, you will need to adjust the tension dial. This dial is usually located a few inches above the needle on the Kenmore machine body. Usually, your machine will have markings to indicate which direction tightens the tension. If these have worn off over the years, watch the dial as you turn it. If it appears to move toward the machine body, then it is tightening.

If the bottom thread is too loose or too tight, then you will need to open the door to the bobbin case. On some Kenmore models, there is a little screw near the bobbin case that can be adjusted slightly to adjust the tension. On other Kenmore models, there is a screw on the bobbin case itself--not on the bobbin, but on the bobbin's casing. This will also adjust the bottom thread tension. Adjust the bobbin thread tension to make slight changes.

If the thread is looping severely on one side, the thread weights might be off. For instance, look to see if you have a lightweight thread on the bobbin and a heavyweight one on the top. If the thread keeps breaking, the top tension or bottom tension could be too tight or the thread is too lightweight for the material you have selected. Check your combination of threads and material. Also make sure you are using the right weight needle and the right foot for the sewing step or project you are working on.

If your Kenmore sewing machine's tension is off severely or if you have not used your Kenmore in a long time, then you might need to take your machine in to be serviced. Sometimes, the inner parts need to be oiled or the entire machine might need to be cleaned and calibrated by a professional. If you sew a great deal or if your machine sits idle a lot, both situations will usually require some servicing to keep your Kenmore sewing machine and its tension in perfect working condition.

if you very carefully lift the decorative plate at the bottom left corner you'll find hidden screw took me a while to find it cause mine

I think the feed dog lever needs to be positioned on the right.