20 Most Recent Bernina Bernette 75 Questions & Answers

See if this video helps Rene. Did you get the manual with it? https://www.youtube.com/watch?v=bKZTa_kvDKQ https://www.google.com/search?q=Bernina+Bernette+335+s+5+thread+overlocker%2C+attaching+the+thread%2Fspool+holder

BERNETTE 335 INSTCTRUCTION MANUAL Pdf Download

https://www.manualslib.com > ... > 335View and Download Bernette 335 instctruction manual online. Bernina Overlocker. 335 sewing machine pdf ... 5 Thread Overlock Seam with Double Chain Stitch.

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.
   

You could try to find the manual on eBay

here's a link for a free manual, just click on it to downloadhttp://www.bernina.com/getdoc/4a3fb7af-a8d3-488a-a76a-0147415042a7/Bernette_50_60_70_75_manual

do you have a sewing store in your area, I would take it there and ask them to help you. I am sure someone there should do it for free for you. hope it works

The owner's manual should have oiling instructions for the machine. If not, contact a local Bernina dealer. ...

Hi. Benieth the free arm there is a lever that you can switch from left to right. This raises and lowers the feeddogs for normal sewing and darning. Possibly you need to flip that switch lever. If that doesn't solve it then the freearm cover on the bottom needs to be removed and the feeddog mechanism cleaned and oiled. Could be stuck.
Good luck. Hope its the easy fix.
Rick

The presser foot is a 2 piece thing, remove the foot, then remove the top bit that the foot attaches to (the shank). Look at the bottom of the shank while pressing the little lever or button on the back of it, you will see how the foot attaches to the shank.

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Please don't use WD40 on your sewing machine, WD40 is an alcohol based cleaner and will do the opposite of lubricate. Take your machine to a certified Bernina Repair shop, they will have a look at the timing and lubricate all of your gears. Lubricant will dry out over time, grease turns to putty and oils turn to varnish after several years of non-service. Lint is attracted to moisture, moisture being those key areas of any machine. Lint acts like an oil wick and will draw out your lubricant from key areas. It then begins to attract dust and other nasty things over the years to become grit. Your motor begins to burn out due to stress trying to move all of these clocked gears, cams and shafts. Take your machine in!

If you visit this company:
http://www.sewingmanuals.com/Sewing_Machine_Manuals/Bernina.htm
Sadly you will have to pay for an instruction manual, leads to a PayPal account.
Please rate this thanks,

If it's old and has never been run, it will need a proper service fro the parts that have become immobile due to the lubricant "gumming up". Off to the sewing machine shop for you!

Find the serial number, engraved into the metal on the back of the machine or low down on the hand wheel end. First digit is the decade: 1=1970's, 2=1980's, 3=1990's Second digit is the year in the decade. E.g. my 1030 is 27230888 so it was made in 1987.

THERE ARE MANY AVAILABLE SO YOU CAN ORDER A GENERIC ONE OR ONE THAT IS ESPECIALLY MADE FOR YOUR MACHINE. YOU CAN ALSO LOOK ON EBAY AND FIND THIS TYPE OF EQUIPMENT. http://www.sewingpartsonline.com/

Bent needle and dirty machine or machine in need of a proper COA (tuneup) are my first thoughts.