I have a wall-mounted cupboard that I bought some about 7 years ago. It has a lift-up front face which is driven by a KESSEBOHMER hinge mechanism. The face falls when lifted, apparently a common issue that can be fixed by strengthening the spring inside. Unfortunately I could not find my exact one in their catalog.

It looks like this:

enter image description here

There are + and - indications. The ones on the right, next to the screw, are there to fine-adjust the height of the mechanism - when turning the screw the whole system moves up or down a bit. I do not know what the other +/- (the one on the left) means.

I wanted to ask if someone has ever adjusted this mechanism before? The thing that worries me is that I do not see any visible way to adjust the force of the spring.

EDIT: the two holes on the left of the two screws (the lower one is also on the right of the quasi-vertical ← + - → sign) are just mounting holes for the cover that comes on top of the mechanism. They are empty.

EDIT: the piston is a breaking mechanism to slow down the falling facing, it does not take part in maintaining it lifted (I checked that on the other, correctly working hinges)

  • Is there a screw or hex head in the hole to the right of the left (linear) +/- marking? Have you rotated that screw left/right?
    – Jon Custer
    Commented Jan 1 at 16:15
  • 1
    why are you asking here? ... contact the manufacturer
    – jsotola
    Commented Jan 1 at 16:29
  • @jsotola: I did it already, but no response. This is the fallback solution, hoping someone has one.
    – WoJ
    Commented Jan 1 at 16:32
  • @JonCuster: they are mounting holes - I updated my question with that information
    – WoJ
    Commented Jan 1 at 16:34
  • 1
    I do think the manufacturer (/one of their distributors) will solve this, but can you pull out the piston? Does it twist one way or another to increase preload? Commented Jan 1 at 16:35

2 Answers 2

  1. "I do not know what the other +/- (the one on the left) means." If there is no adjustment mechanism there, perhaps part of the hinge is missing, e.g., an additional spring and tensioning screw to adjust the lift of the hinge? Or is that hole by the arrow point, in what appears to be a sliding bar, used to slide it along that track to adjust tension?
  2. On a balanced-arm lamp that drooped when a heavy LED replaced the incandescent lamp, I added an elastic band cut from automotive inner tube around the existing posts holding the spring, and achieved good balance. You might try something similar around the red and gray part that looks like a combined pneumatic delay and spring. To achieve different length rubber bands from the inner tube, cut diagonally, rather than straight across.
  • perhaps part of the hinge is missing - unfortunately no, I have three other identical hinges that look the same (and work fine) and they are identical.
    – WoJ
    Commented Jan 1 at 16:04
  • Or is that hole by the arrow point → they are mounting holes - I updated my question with that information
    – WoJ
    Commented Jan 1 at 16:35

I've fixed it!! I had exactly the same problem with the door not holding open. The fix was to screw the small bolt at the top in a clockwise direction. This allowed the door to stay open a bit further and avoid gravity taking over. It's fiddly but pliers will do the job if you don't have the correct size spanner.

  • Thanks a lot for following up! You mean the bolt that is seen from the side (which thread we can see on the picture)?
    – WoJ
    Commented Apr 7 at 14:36

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