Broken guide pin

Started by Zaki, November 17, 2004, 03:21:19 AM

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Zaki

Hmm... just got my broken tine fixed last week, but now I noticed that two of the guide pins under the keys of my plastic key MKII has broken off. I read that this was a general issue with plastic key MKIIs and that it is difficult to fix. But how is it best fixed? Difficult or not.
I still have one of the guide pins and my first thoughd was to super-glue it back in, but I don't believe it will last  :(
Then I thoughd about drilling a hole exactly where the guide pin was originally seated and inserting a wood dowel pin of the right size instead. Does anyone have an idea wether this will work? Or maybe other suggestions.

hrees

You will have to redrill and use dowel of the correct thickness. This works very well if done correctly. Remove the guide pin rail from the piano and unscrew then slide out the module with the broken pins, after removing the felt strip. This will make it a lot easier to work on.

Zaki

I managed to fix the guide pin issue. I did it using two ordinary screws, with the same thickness as the guide pins, as substitutes. The screws were off the type with the thread stopping approximately an inch and a half under the head of the screw. I cut the head off the screw and filed it to avoid friction against the plastic key. I cut a groove in the top, allowing the screw to be screwed in with a ordinary flat head screwdriver.

I drilled a hole in the guide pin rail and screwed in the first screw. Unfortunately the screw broke off, while I was screwing it in, causing great pain and lots of trouble trying to get it out. I found that it was necessary to unmount the guide pin rail, to remove the rest of the screw, but it proved not to be very diffiult and the next hole was drilled way easier this way. I managed to get both screws in place, but one of them is not seated that tight, because of the damage done while removing the ruined screw. I hope it will last. Otherwise I will have to give it another go.

I also managed to alter the action of the keyboard by using the other holes in the keys, making the action heavier. That is way better that way if you ask me.