Question about Brother LS-2125 Mechanical Sewing Machine

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Bobbin I recently took the shuttle and race out and cleaned and oiled them. Now they won't go back properly. I have tried a number of different angles and my machine still won't stitch on the bottom of the fabric. The thread jumbles up inside the bobbin area. All the manuals online don't give a clear picture of how to reinstall the shuttle. If anyone could help me,it would be greatly appreciated.

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6 Suggested Answers

  • 399 Answers

SOURCE: I have a Brother SE-270D

its the problem of the timing belt in your machine its extra loosen or extra tightned or is slightly came out of its position or finally broken.
as the machine is proper just missing the proper speed as it should be .
it is running continuosly as you stated.
check the timing belt and make it proper if its worn out and needs replacement this is how its done

There is an adjusting screw on the right side of the machine head. Follow the motor bracket to the machine head and loosen that big old screw or bolt which will raise or lower the motor giving you slack to remove or replace the belt.

feel free for further queries

Posted on Sep 19, 2008

  • 1388 Answers

SOURCE: Huge loops on back of fabric!

Please TRY the solution BEFORE giving your considered rating.
Specific detail on bobbin case adjustment (with picture) near halfway down reply, the remainder will help you achieve a balance of top and bottom tensions.

Ensure that all is clean and free of lint and jams, this is the most likely for tension troubleshooting .......

This solution is for tension problems...if you cannot form any sort of stitch, the issue is quite different, so please let me know if you need a different problem solved.....

It is quite long, but just work through each section in order.

The "knotting up" can reveal a lot. If you have loose threads on one side or the other, the tension on the opposite side will be the culprit.

Ensure sharp new needle,
Thread guides and Bobbin are Clean & Clear of lint
Set Top Tesion to 4 ....then....
Balance Bobbin to suit.

If the looping threads are on the underside as you sew, it is the top tension. Top tension ought to be between 4 & 6 (this variation to allow for the different weights of fabric in your projects).

If you are using a needle that has seen quite a deal of work, or you suspect it may be blunt, change it for a new one !

Make sure that when you thread the machine the presser foot is up so the thread goes between the discs and not to one side, top tension between 4 and 6, and that you have threaded through all the guides, including the last one, usually on the needle arm, just above the needle clamp.

It may be there is lint trapped between the discs, this will keep them slightly apart and reduce the actual tension, sometimes dramatically.

If tensions appear correct, and the thread is definitely in the channel between the discs, but still too loose and looping, try raising presser foot and remove your thread.

Now, with a 2" (50mm) wide strip piece of fabric 8 - 10" (20 - 25cm) moistened with methylated or denatured spirit, gently insert the fabric strip and clean between the discs with a see saw / to and fro action.

In the worst cases, gentle use of a needle to pick & remove the jam may be necessary, but be very gentle and make sure the tension is set at Zero and the presser foot is raised, (to disengage tension plates).... do not gouge or score the plates, they need a polished surface to work correctly.

Far less common, but if the loose threads are on the top, it is bobbin tension that is loose, it too may have lint in the spring and be giving a "false" tension.

I would not recommend fiddling with bobbin tension without good reason, it may end up with missing small screws and spring pieces, however, you can take the needle plate off to clean
the hook race area (where bobbin case sits)

...this is just good housekeeping, my wife does this every time she replaces the bobbin....

just take it out and clean the bobbin case and the fixed metal hook race with a small brush to remove lint. If there is a significant amount of lint, use a vacuum and small brush to get the worst.

Then wipe all this area with a cloth or cotton bud (Q tip) moistened (not soaked) with methylated spirit, especially if there appears to be fine dirty deposits....oil and lint combine to conspire against you.

If it seems likely that you ......really .....actually .....need adjust the bobbin case, first check there is no lint trapped in the metal spring where the thread is tensioned.

Drop-in Bobbin case will look similar to this image with the tension screw in the middle of the metalwork....

4c76dc1.jpg ...the other screw at one end is holding it all together, so is not a tragedy to undo the whole lot and clean it, but very gingerly and lay the bits out in sequence and orientation, or you risk tearing your hair out !

....this is a bobbin case from a front loading machine and works in a very similar fashion to the top loader with drop in bobbin, again, if you dismantle it, take care so you can put it all
back properly.
165ca5c.jpg FINISHING UP
When you are certain there's no trapped lint in top tension or bobbin, set the top tension to 4 and the bobbin tension to a point where you just begin to feel resistance.

Try using good quality thread of contrasting colours so you can more easily spot the changes.

Set your zigzag to one width less than maximum (eg. 5 of 6 ...or... 4 of 5 etc) and sew a sample for a few inches and check the result.... adjust the bobbin tension screw very little at
a time, perhaps 1/16 of a turn.

You may find you are playing with this balance for some little while and if you are putting the needleplate on and off each time begin to think it cannot be correct to do is,
and eventually, you do get a "feel" for the correct tension and then it happens quite a user you won't be doing it very often unless there is lint built up (or are there small hands at work around the house !?!?!)

If you live near the ocean as we do, salt air can play havoc with metalwork inside and out, so to help minimise this, keep a few small packets of dessicant (silica gel) in your machine case ? then make some sort of cover !

Same applies in any damp or humid environment, keep your machine dry and dust free.

Budget for a proper full service every couple of years (more often if heavily used) and if you don't use your machine for a few years, be aware that old oil will dry out and combining with
dust and form a "clag" like glue (another reason for some sort of cover, even a teatowel !)

If it is worth spending the time, energy and money on making something that you would like to give lasting enjoyment......use quality thread, may seem to cost a little more at the
time, but the results, ease of use and added longevity will be worth the extra, and as a bonus, your tension troubles may be fewer and further between, because there is a more consistent diameter with good thread, and less compensating to be done by your tension plates and less thread breaks !

Posted on Aug 02, 2009

  • 30 Answers

SOURCE: mass bunching of thread in the bobbin compartment

it had nothing to do with the shuttle, it is the upper thread is not in the tensioner. lift the presser foot up and thread the machine even if you have to hold the thread on the top and pull on the bottom to make it go in the tensioner it will help, if a machine loops on the bottom it is the upper tension if it loops on the top it is the lower tension

Posted on Aug 22, 2009

  • 5 Answers

SOURCE: Shirring fabric?

When putting your shirring elastic on the bobbin, don't thread the elastic through the bobbin holder,adjust the stitch length longer,and loosen the tension, other wise if you want to put it through the bobbin holder you have to loosen the tension screw on the bobbin holder, and then you have to adjust it back for ordinary sewing,

Posted on Feb 13, 2010

  • 23 Answers

SOURCE: Bobbin thread comes out in a mass of threads

ENSURE you have threaded the bobbin properly and at the right tension. Also, ensure that you have routed the bobbin thread properly in the bobbin case.

Posted on Apr 13, 2010

  • 2 Answers

SOURCE: Bobbin thread bunching up.

You might have to adjust the tension. My machine was doing something similar because I accidentally changed the tension instead of the stitch length. The manuel should tell you how to adjust it.

Posted on May 10, 2010

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Why won't my Bernina Activa 140 sew the blind hem stitch?

Are you absolutley sure you're not getting a problem with stitch formation on, for example, wide zig-zag. Check again, using a different colour top and bottom and make sure that the stitch is being formed properly with only the top colour on top and bottom colour on the bottom. It sounds as though the bottom loop is not being picked-up by the hook properly. Make sure you've thoroughly cleaned-out any fluff under the stitch-plate and remove the hook/shuttle and give the hook race a good clean and give it a single drop of oil, even if you've got the lightweight part-plastic hook/shuttle fitted.

Nov 19, 2011 | Bernina Activa 140

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Should the machine have some oil? Where? It is a Bernina Activa 130

The Activa range is fitted with a light-weight part-plastic hook/shuttle that Bernina claims does not require oiling. However, this does not mean it shouldn't be regularly cleaned and I'd recommend that it is also lightly oiled at the same time. Remove the bobbin case, press the metal lever to the top left of the bobbin door and the black plastic hook/shuttle retainer should pop open so that the hook/shuttle can be removed, or it will just drop out anyway. Use a cotton bud to firmly clean around the inside edge of the hook race (the round piece that the hook/shuttle sits in. Give the whole thing a good clean to make sure any surface grime/fluff is removed. Put a small drop of oil on the running surface of the hook race - the recessed groove around the inside edge, before replacing the hook/shuttle and holding in place by pressing the hook/shuttle retainer back until the securing lever clicks back into place. Rotate the handwheel once to distribute the oil and off you go. Dont overoil but do this regularly and your machine will run much quieter and produce a consistent stitch formation.

Jul 07, 2011 | Bernina Activa 130

1 Answer

I took out the bobbin case and then the shuttle race. Now I can't remember which one I should put back in first.

Clean the shuttle area, the hook and the cover with a toothbrush, removing all lint and debris. Place one small drop of sewing machine oil on the rim of the hook. Place the hook back in the raceway and replace the cover. Snap the two retaining levers back to hold the cover in place.

Jun 02, 2011 | White Sewing Sewing Machines

1 Answer

Bobin will not thread up..does not turn

Refer to the manual for removing the bobbin case and race/shuttle. Clean the area. Read the instructions to be sure the race/shuttle is properly reinstalled.

If the bobbin remains jammed, a service tech will need to look at it.

Mar 10, 2010 | Sewing Machines

1 Answer

I need to know how to clean and oil the machine

From the Sears Kenmore manual:
Using a small brush, remove the lint that accumulates in the shuttle area and around the feed dogs.
To Clean the Shuttle Area:
  1. This area must be kept free of dust, lint and occasional tangled thread. Raise the needle bar to its highest point and remove the bobbin case.
  2. Push levers of shuttle race aside and lift shuttle race cover and shuttle out.
  3. Clean the shuttle race with a small brush.
  4. Put a drop of oil on the center pin of the shuttle and shuttle race.

Jan 25, 2010 | Sewing Machines

1 Answer

Where is the shuttle race on a Bernina Artista 180? I'd like to be exact as to where to put the drop of oil.

Just to the left of the bobbin case you will see a small lever. Remove the bobbin case and push the lever and that will release the latch which holds the race cover and shuttle (hook).

Clean well with a toothbrush and place one small drop of oil on the edge of the hook where it makes contact with the raceway. Place the hook back and snap the race cover back on.

Oct 01, 2009 | Bernina Artista 180

1 Answer

Bobbin and shuttle case pop out of machine .

You might need to clean the shuttle assembly.

1. Raise the needle bar to its highest position and remove the bobbin case.

2. Push levers sideways of the shuttle assembly and liftshuttle and shuttle race cove out by the center pin.

3. Clean the shuttle race of any lint or small particles of thread with a small brush.

4. Put a drop of oil on the center pin of the shuttle and on the shuttle race.

to reassemble, hold sjuttle by center pin and it carefull into assembly opposit the shuttle driver. Slip shuttle race cover into place. Snap the levers into position.

Occasionally remove the needle plate and clean feed dog with soft brush.

I hope that helps!

Apr 23, 2009 | Brother LS-2125 Mechanical Sewing Machine

2 Answers

Can't reassemble shuttle hook and shuttle race

the hook driver (still in machine) is 1/2 moon shape. The hook is also 1/2 moon shape. If you set the machine on its back, it's easier. Set the hook 1/2 into the other 1/2 of the hook driver to make a circle. Then put the hook cover on (machine still on its back) with the tabs for the twist locks pointed out. Needle gaurd to the top of the machine. Snap the twist locks in place and viola!

Mar 16, 2009 | Baby Lock BL1556

1 Answer

Shuttle alignment and assembly

The shuttle/race/bobbin system shouldn't really be taken apart by the average user. Unfortunately, your chances of ever getting it back together properly so the machine will sew (this is the timing of the machine) are very slim. You'll need to take it to a sewing machine technician. I would recommend an authorized Pfaff tech as they'll be sure to have the proper tools to do this correctly - won't be inexpensive but will be worth it. Most "neighborhood sewing machine repair folks" don't have experience on computer machines. Resetting timing on a computer machine isn't the same as the old mechanicals and requires some expertise.

May 02, 2008 | PfaFF Creative 7570

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