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Fixing adjustable bench: posted on Tech forum but maybe.... #2801000
01/11/19 06:31 PM
01/11/19 06:31 PM
Joined: Nov 2009
Posts: 22,258
New York
Mark_C Online content OP
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....but maybe one of y'all might know about this, so....

First of all, I wasn't sure what to call it.
Y'all probably know what I'm talking about, but to make sure, I mean one of these:

[Linked Image]

I'd been noticing for some time that the seat was a bit wobbly, from side to side, probably for many months. But now, it was really wobbly. Since I'm slightly handy with fix-its (very slightly handy, as you'll soon see) grin I figured I'd look underneath to see what's going on. I thought maybe some screw or nut was loose and it would just need to be tightened.

What I found was that there was this fat metal rod, about ½-inch thick, that was askew. Clearly it was supposed to be straight-horizontal but it was a little diagonal.
I figured the first thing was to try to just straighten it -- and it came loose. At the same time, this little piece of hardware came loose and fell down: fat black screw, about 1½-inch long with a little silver-color cylindrical thing around the first part of it.

I tried to slip the rod back into place -- and immediately, another identical fat metal rod came loose -- from where, I couldn't tell you.

And then I had a 'recovered memory': I seemed to remember that some time ago, probably over a year ago, I had found some little piece of hardware on the floor, and while my first thought was just to throw it away since I had no idea what it was, my better judgment took over and I put it somewhere in this little cabinet that's near the piano. I figured maybe it was something from this bench.
Lo and behold, I found it -- and it's another one of those 1½-inch black screws with a little silver-color cylindrical thing around the first part of it.

So that's where I am -- and I have no idea how to try to put it all back together. I searched online quite a bit, and wasn't able to find anything.

I imagine that a lot of you know what to do. I hope I've described it well enough for someone to be able to tell me what to do -- mainly "what goes where" and in what order to try to do anything.

Thanks in advance.
I have a feeling that y'all will make me able to get the thing back together before the night is out....

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Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: Mark_C] #2801003
01/11/19 06:39 PM
01/11/19 06:39 PM
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JohnSprung Online content
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Could you post some pictures of the underside where the bars fell from? Perhaps then someone else can post pictures of a complete unit, which will clarify where the bars need to be.


-- J.S.

[Linked Image] [Linked Image]

Knabe Grand # 10927
Yamaha CP33
Kawai FS690
Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: JohnSprung] #2801005
01/11/19 06:40 PM
01/11/19 06:40 PM
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Originally Posted by JohnSprung

Could you post some pictures of the underside where the bars fell from? Perhaps then someone else can post pictures of a complete unit, which will clarify where the bars need to be.

To clarify: Actually I think I do know basically where they go -- I don't think I need help on that; just how exactly to try to position them and what to do with those screws in relation to the rods.

Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: Mark_C] #2801006
01/11/19 06:43 PM
01/11/19 06:43 PM
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JoelW Offline
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It's very possible that you've ruined it beyond repair.

Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: JoelW] #2801009
01/11/19 06:45 PM
01/11/19 06:45 PM
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Originally Posted by JoelW
It's very possible that you've ruined it beyond repair.

tyvm. ha

Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: JohnSprung] #2801013
01/11/19 07:01 PM
01/11/19 07:01 PM
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Originally Posted by JohnSprung

Could you post some pictures of the underside where the bars fell from? Perhaps then someone else can post pictures of a complete unit, which will clarify where the bars need to be.

P.S. I found an image online that's very similar to what I have. I posted this on the other thread too.

[Linked Image]

I'm pretty sure that my 2 loose rods are the ones that are seen toward the background of this image -- i.e. not the 3 "vertical" rods closest to the the camera ("vertical" in terms of being vertical in this image), but the 2 'vertical' rods to the rear, 1 to each side of the middle rod in the front.

I hope this helps.

Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: Mark_C] #2801042
01/11/19 09:02 PM
01/11/19 09:02 PM
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JohnSprung Online content
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OK, so you have two rods, and they both have collars with setscrews. I'd start by putting the collars on the rods about 1/3 of the way from the end, then try to get the rods into the rectangular bars as shown. They were able to fall out of there, so there might well be a way to work them back in. When you get the rods in place, move the collars to where they belong in the picture, and tighten all the setscrews, including the ones on the other three rods.


-- J.S.

[Linked Image] [Linked Image]

Knabe Grand # 10927
Yamaha CP33
Kawai FS690
Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: JohnSprung] #2801050
01/11/19 09:29 PM
01/11/19 09:29 PM
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Originally Posted by JohnSprung

OK, so you have two rods, and they both have collars with setscrews. I'd start by putting the collars on the rods about 1/3 of the way from the end, then try to get the rods into the rectangular bars as shown. They were able to fall out of there, so there might well be a way to work them back in. When you get the rods in place, move the collars to where they belong in the picture, and tighten all the setscrews, including the ones on the other three rods.

Well, I was working on it while you were posting, and probably what I did was pretty much exactly what you say. (Except, I didn't notice set screws and didn't use any -- maybe the absence of set screws is why they came loose? Maybe there are supposed to be set screws but they never got put on? Maybe they came loose and got lost..... I did notice little holes that seemed like they were for set screws.)
The reason I was able to do it was that the image I found online (which I went and looked for only because you and a guy on the other thread said it would be helpful for me to post a pic!) pretty clearly indicated what I needed to do.

I explain it in more detail over here.
Thank you!!!

Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: Mark_C] #2802304
01/15/19 02:01 PM
01/15/19 02:01 PM
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JohnSprung Online content
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Probably the setscrews fell out, which is why the collars could move enough for the bars to also fall out. That's why it would be a good idea for all owners of these benches to check the torque on all the setscrews in the entire installed base....


-- J.S.

[Linked Image] [Linked Image]

Knabe Grand # 10927
Yamaha CP33
Kawai FS690
Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: Mark_C] #2802410
01/15/19 06:59 PM
01/15/19 06:59 PM
Joined: Feb 2012
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It’s an “Artist Bench”. At least that’s what I discovered when I tried to buy one separately from a piano. (I needed one for the recently installed but bench-less piano at the ballet studio where I play.) Also called a Jansen bench. I guess because that’s the company that made them first.

All I know is that the bench I got (not Jansen brand) is wobbly and squeaky and it drives me batty. I thought the fix would be easy and that our facilities manager at the studio could fix it but he could not. Or maybe he didn’t really try. At any rate, that thing is loud enough so that anything played on that piano can legally be called a duet.

Maybe I’ll take another look under it based on the collective knowledge on this thread.

Re: Fixing adjustable bench: posted on Tech forum but maybe.... [Re: TwoSnowflakes] #2802424
01/15/19 07:33 PM
01/15/19 07:33 PM
Joined: Apr 2002
Posts: 1,777
Auckland, New Zealand
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Ted Offline
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Joined: Apr 2002
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Auckland, New Zealand
Originally Posted by TwoSnowflakes
...All I know is that the bench I got (not Jansen brand) is wobbly and squeaky and it drives me batty. I thought the fix would be easy and that our facilities manager at the studio could fix it but he could not. Or maybe he didn’t really try. At any rate, that thing is loud enough so that anything played on that piano can legally be called a duet. ...


I do a lot of recording and I thought the squeaks were some sort of artifact in the mp3 versions of my files. I was so dense I sat up past midnight correcting them with Audacity before the truth clicked with me. The people in the shop just told me to tighten the screws and put some vaseline on the rods; this had no effect other than making a mess. I became annoyed and bought an ordinary, "cheap as chips" wooden bench, which has served me splendidly for the last seven years. The "artist's bench" is now an extra seat in the lounge, a total waste of money.


"We shall always love the music of the masters, but they are all dead and now it's our turn." - Llewelyn Jones, my piano teacher

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