Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Kenmore
Mechanical Sewing Machine

Model # 158840 Official Kenmore sewing machine

Here are the diagrams and repair parts for Official Kenmore 158840 sewing machine, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual
Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 251 parts  |
Spring 11230
#24

Base assembly diagram

Spring

Part #11230

The manufacturer no longer makes this part, and there's no substitute part

Axle Key 162
#11

Zigzag guide assembly diagram

Axle key

Part #162

The manufacturer no longer makes this part, and there's no substitute part

Sewing Machine Set Screw 26
#16

Presser bar and shuttle assembly diagram

Sewing machine set screw

Part #26

The manufacturer no longer makes this part, and there's no substitute part

Lamp Plate 2987
#40

Base assembly diagram

Lamp plate

Part #2987

The manufacturer no longer makes this part, and there's no substitute part

Hinge Spring 8262
#6

Base assembly diagram

Hinge spring

Part #8262

The manufacturer no longer makes this part, and there's no substitute part

Lever 2918
#47

Zigzag guide assembly diagram

Lever

Part #2918

The manufacturer no longer makes this part, and there's no substitute part

Spring 8384
#50

Zigzag guide assembly diagram

Spring

Part #8384

The manufacturer no longer makes this part, and there's no substitute part

Guard Cord 2537
#13

Zigzag guide assembly diagram

Guard cord

Part #2537

The manufacturer no longer makes this part, and there's no substitute part

Spring 2924
#31

Bobbin winder and tension assembly diagram

Spring

Part #2924

The manufacturer no longer makes this part, and there's no substitute part

Rod 2938
#48

Presser bar and shuttle assembly diagram

Rod

Part #2938

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your sewing machines

Choose a symptom to see related sewing machine repairs.

View all

Why doesn't my sewing machine motor run?

Main causes: faulty foot pedal, locked drive gears, wiring failure, bad drive motor…

Read more

Why does my sewing machine make a knocking sound?

Main causes: machine needs lubrication, internal gear failure…

Read more

Why does the bobbin thread break in my sewing machine?

Main causes: dirty shuttle race, improper thread routing, incorrect thread tension…

Read more

Why is my sewing machine skipping stitches?

Main causes: dirty shuttle race, wrong thread tension, bad needle timing, damaged needle, using the wrong type of needle…

Read more

Why won't fabric move through my sewing machine?

Main causes: problems with the feed dogs, setting stitch length to 0…

Read more

Why won't my sewing machine needle move?

Main causes: disengaged clutch, broken drive belt, internal drive gear failure…

Read more

Why is my sewing machine running sluggishly?

Main causes: lack of lubrication, lint buildup, worn drive belt, faulty drive motor…

Read more

Why does my sewing machine lock up?

Main causes: thread bunched up in the shuttle race, bad needle timing, internal drive gear failures…

Read more

Why won't my sewing machine turn on?

Main causes: power supply failure, bad power cord, faulty On/Off switch…

Read more

Most common repair guides to help fix your sewing machines

These step-by-step repair guides will help you safely fix what’s broken on your sewing machine.

View all
How to replace a sewing machine on/off switch

How to replace a sewing machine on/off switch

If the sewing machine is completely dead, replace the On/Off switch using these 6 steps.…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a sewing machine drive belt

How to replace a sewing machine drive belt

You can replace a broken sewing machine drive belt in about 15 minutes. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a sewing machine drive motor

How to replace a sewing machine drive motor

If the drive motor on your sewing machine runs roughly or doesn't run at all, you can replace it in about 30 minutes usi…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your sewing machines

Use the advice and tips in these articles and videos to get the most out of your sewing machine.

View all
How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Read more
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Read more
How to use a multimeter to test electrical parts video

How to use a multimeter to test electrical parts video

Learn how to use a multimeter to check for wiring problems in an appliance that's not working…

Read more

Parts & More