Question about Singer 7462 Mechanical Sewing Machine

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I have an old Bernina 730. I want to oil it for use again, but the top (lid) won't lift although it has 2 hinges on back. Can't remember a latch being involved to open it. Can I just force the top open with a flat tool? Thanks, Anne

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Took it to a professional.
Problem fixed.

Posted on Nov 08, 2008

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It's been a while since I worked on one of these but it is NEVER a good Idea to force something open unless you want it broken. I think there is a release inside the left side opening (where the light bulb is located). It should be towards the top.
sewman7

Posted on Nov 07, 2008

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Bernina 730 how do I change feed dog pressure it is way to high not touching fabric when down??? Help please


There are actually two Bernina 730 machines (confusing, huh?). One is the 730 Record from around 1960. The other is the more modern 730 computerized model made in the 21st century.

The 730 Record has a hidden pressure adjustment. Lift the top cover and locate the screwhead on the very left side (left of the takeup lever knuckles). This screw loosens or tightens the spring that applies pressure on the presser foot.
The manual can be downloaded here, although it does not show the pressure adjustment:
BERNINA Sewing Systems

On the computerized 730, the pressure adjustment is on the screen (pg 37 of the manual):

BERNINA Sewing Systems

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Jun 25, 2016 | Bernina Sewing Machines

1 Answer

How to correct the zigzag on my bernina 730 record 1-20 zone it drags into the material and out of the material only in the special pattern zone.


The Bernina 730 Record is a great little machine. If the selector levers are sticky/stuck or the handwheel is stiff or does not turn, about 98% of the time the machine needs oil.

Mechanical machines need to be cleaned and oiled regularly just like your car. If the machine sets in storage for a while or is used often but not oiled or cleaned regularly, the oil that exists in the machine will eventually thicken and acts like glue. (Sometimes you can see a dirty-looking dark gold or brownish goop which is usually old oil.) Then your machine is frozen.

First, open the top and bottom of the machine and sweep out any dust, dirt, lint, or stray threads.

Now, oil your machine (there's a diagram below). There are quite a few oil holes (both in the top and bottom of a Bernina mechanical) that require periodic oiling (see your machine Manual). If a metal part is frozen, buy a bottle of liquid Tri-Flow Synthentic Oil (from the hardware store) and put one or two drops in all the spots shown in the manual. (DO NOT oil rubber parts, the two white plastic gears, the belts, or the metal CAMs!!! NEVER use 3-in-1 oil, cooking oil, WD-40, or oil from your grandma's sewing box. And do not put more than one or two drops of oil at a time as over-oiling will also damage your machine.) It also helps to slowly hand rotate the handwheel and, while watching things that move, apply 1-2 drops of oil every place that metal rubs against metal. Do this also with the selectors and dials.

Then, using your hand-held hair dryer, direct hot air into the internal part of the machine (top and bottom). The metal may become hot to the touch. Then try to gently move the handwheel and the selector levers. Repeat. Let it set overnight. Then test again the next day, and repeat the process if needed.

To maintain your machine, a good recommendation is to oil every time the bobbin thread is changed, every 8 hours of constant sewing, or every six months if the machine is not in use. Use a good quality oil, ie Bernina oil for "mechanical" machines. When oiling, also be sure to brush out the dust and lint (especially around the feed dogs and bobbin works).

If the oil in your tube looks dark colored, throw it out and get some new. I've run across some old sewing machine oil in the can that looked like dark honey and stunk to high heaven. Get rid of it!

Treat your machine well and it will serve you well for many years.


This is an oiling diagram of an 830 Record which is very similar to the 730.
correct-zigzag-bernina-730-record-1-20-svdv1d04cr50xevifpzkzumu-1-2.jpg


This is an oiling diagram for the 930 Record. Also fairly similar.
correct-zigzag-bernina-730-record-1-20-svdv1d04cr50xevifpzkzumu-1-4.png...

Oct 10, 2015 | Bernina Sewing Machines

1 Answer

How can I fix a stuck needle bar on my Bernina 730?


If this is a Bernina 730 Record, it needs to be cleaned and oiled. Do not attempt to run the motor if the mechanics are stuck as it could damage the motor.

Consult your owner's manual in the Maintenance section, use only good quality sewing machine oil (NOT old stale oil, 3-in-1, WD-40, or cooking oil) and apply 1-2 drops every place that metal rubs on metal (while you hand-rotate the wheel). Pay particular attention to your problem areas--the needlebar area and the handwheel area (Do NOT oil the cams, the belts, or the plastic gears!!) To speed it up, you can direct hot air from a handheld hairdryer into the internal mechanics. (You may have to repeat several times over several days depending how "stuck" things are.)

If you are impatient, try to find a bottle of liquid Tri-Flow Synthetic Lube at the hardware store or bike shop and use it in place of the sewing machine oil. Once the machine is running smoothly again, you can use sewing machine oil or continue to use Tri-Flow in its place.

In the future, following the instructions in your manual, clean and apply 1-2 drops oil to the shuttle/race every time you change a bobbin (about every 8 hours of constant sewing), do a thorough but light oil as explained above every 40 hours of sewing, or if in storage or not in regular use, every 6 months. If it hasn't been used in a while, always give it some TLC before asking it to work for you.

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Sep 17, 2015 | Sewing Machines

2 Answers

Bernina 730


try changing the needle--one for the fabric being sewed
also the zig zag could have a worn or damaged gear or cam
or there could be a timing problem.

Apr 11, 2014 | Sewing Machines

2 Answers

Bernina Record 730 hand wheel stuck


OK OBRIGADO VOU LIMPAR A MAQUINA PODE SER POEIRA PORQUE FICOU ALGUNS MESES SEM FUNCIONAR.
aGRADECIA SE ELA FUNCIONASSE TENHO MUITOS TRABALHOS POR FAZER SOMENTE O ERROR C14A3 ESTA A BARRAR-ME E NAO ACEITA MAIS NADA A FUNCIONAR

Feb 06, 2014 | Bernina Sewing Machines

1 Answer

Bernina Arista 730 Check hook system - This won't sew correctly and is frustrating as I just used the system last night to do embroidery.


The 730 rotary hook is a bit sensitive to adjustment and cleaning. Make sure that the hook is clean and if you haven't oiled it for a while, give it a drop of oil (do you know where to put it ... many dont !) Check your needle is OK and, again, if used for a while, just put a new one in anyway. Load-up with different colours of the same type of thread top and bottom and sew-off a sequence of zig-zag, starting with the default and increasing the width and reducing the length until you get to a maximum width satin-stitch (dont increase the bobbin or top tension as you do it). Once you've done that, let me know what it looks like. The colours should be equal top and bottom, but maybe just a bit of top coming through to the underside on max width satin stitch. You'd also be advised to sew-off using pattern number 437 and the figure '9' - this will check the balance of the machine. If the '9' is not perfect, or the top section of the pattern 437 is not dead-central on the top of the triangular part of the pattern, the balance may need adjustment. Let me know how you get on.

Oct 16, 2011 | Bernina Sewing Machines

1 Answer

Bernina730


HI
All that is wrong is that the plunger that holds the lid down is likely siezed with old oil. If you are careful you can slowly insert 2 flat sided screw drivers under the front part of the lid on either side of the right and left side of the lid and slowly move them toward the middle , thus the plunger will likely give way and the lid will pop open.
If this does not work contact me at sewaway@shaw.ca

Wayne Buss

Apr 18, 2010 | Bernina Bernette 75

2 Answers

How to open the lid of the Bernina 731


I looked at this manual - http://www.berninausa.com/webautor-data/486/BERNINA_730_731_732_manual.pdf and cannot determine how to do this without the aid of a flat edge screw driver.

Mar 25, 2010 | Bernina Sewing Machines

1 Answer

Bernina 730 Can't open top cover !


The problem is that of a stuck piston detent on the pattern selector support that snaps the top cover closed.
  1. Open the light cover
  2. Apply pressure with thumbs on the bottom edge of the top cover on both the right and left sides of the cover. The cover should pop up...Too much pressure on the left side, (if this thing is really stuck) and you might break the top cover at the thread tension slot. Be careful here....
  3. Add a drop of acetone (fingernail polish remover) to the piston detent and work it free by pushing it back and forth. Avoid getting any acetone on the painted surfaces of the machine.
  4. Continue to work free, repeating with a few drops of acetone, and wipe clean. Don't oil this part. It was a petroleum product combined with a galvanic process (aluminum and steel) that caused the problem in the first place, not to mention age.
  5. Use DTE Heavy Medium oil rather than a white or clear oil when you lubricate your machine. White oils are unstable and will oxidize (decay) much more quickly. Also avoid 3 in 1 oil and stuff like WD40....very bad....
  6. Oil 1/2 a drop on those prescribed areas. Too much oil is more harmful than not enough....
  7. Contact your Bernina dealer for this oil.

Aug 12, 2009 | Bernina Bernette 75

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