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Hi,

could someone tell me which screws I have to turn (maybe with a photo) to take the mechanic action out of the piano ? I allready removed the fallboard, but what i have to do next? It is a C3X

The steps to remove the action on a Yamaha grand are: remove fallboard, remove cheek block screws, remove cheek blocks, remove key slip, slide out action.

NOTE: When sliding the action in and out, if you are not careful, it is possible to catch a hammer and break a shank. Make sure all the hammers are down, at rest.

Once the cheek blocks are removed, the action guide pins to the left and right are something you can gently pull on when sliding it out.

If you aren't comfortable with this, have a tech do it.

which screws exactly? Under the piano there are 3 screws. Sorry, i am woman and not very technical

for what are this screws under the piano?

https://picload.org/view/dcidwaca/dsc_0011.jpg.html

I'm assuming this piano uses wing nuts for the cheek blocks, not screws.
However, if you've never done this before, you should really watch a technician do it first, in your home. The chances of a novice (who's never done this before) breaking something are VERY high.

If you just want to get access and not slide the action out, then it's a lot less dangerous.

On older Yamaha grands, with a spring to hold the fallboard up, you need to remove the bass cheek block screw before removing the fallboard. The cheek block screws are usually screws with wings, like a wing nut, so you can turn them by hand. They are the only ones directly under the cheek blocks.

there are only 2 screws on each side (see photo https://picload.org/view/dcidwaca/dsc_0011.jpg.html ) , no wings.

yes, i'm only curious, i will not really slid the action completly out. I like to know how to do it, for what are the screws , how it is installed, how it works

I just removed the action from a C3 Tuesday, and it had the wing screws.

perhaps it is different on the C3X? Or the screws are not the original ones? If they are nor the originals ones, is this bad?

I have a C3X and it has normal counter-sunk wood screws just under each cheek block (the black "cubes" at each side of the keyboard).
You'll need a biggish flat blade screwdriver to do this.

Older C3's had the convenient wingnuts. Current production is screws, and have for probably 20+ years.

inoxinox, The screw you are looking for is the one that goes through the key bed into the cheek block. Only 1 screw will line up with the cheek block. If this description is still not making sense, then you may need professional assistance.

On a Yamaha, it will be a philips head, though it may be a combo head.

Please do not perpetuate this non-sense that women are not technical. What about the men who aren't technical? Are they not allowed to be not technical? I work with lots of men who could barely spell technology and their eyes glaze over if you show them anything technical or math related.

+1

Yes, and be very careful that you don't press any keys as you grab the ends of the keyboard, which will also make the hammers go up and break off. Breaking shanks is the biggest danger in pulling your own action.

With respect I think this is a case of: if you need to ask these questions, you probably shouldn't be doing it. It is very easy to break something, as I have found out to my expense.

Did you check out YouTube videos? I'm sure there will be some showing you what screws you are looking for....

Why haven't you watched your technician remove the action before?

Please keep in mind what curiosity did to the proverbial cat.

Wait until your next tech visit and satisfy your curiosity then.