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#1924884 - 07/10/12 12:05 AM Upright damper rod hinges  
Joined: Oct 2008
Posts: 217
David, OHIO Offline
Full Member
David, OHIO  Offline
Full Member

Joined: Oct 2008
Posts: 217
Coshocton, Ohio
Greetings,
I have broken pins from a upright damper rod. I can only find the barrel part for a replacement but the pin in the rod has broken. Are these pressed in? Anyone have to repair these before? I've inserted 2 pictures and I hope they show up.


[Linked Image] [Linked Image]


David Chadwick RPT
Coshocton, Ohio
1931 Mason Hamlin AA
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#1924897 - 07/10/12 01:04 AM Re: Upright damper rod hinges [Re: David, OHIO]  
Joined: Sep 2007
Posts: 33
JackH Offline
Full Member
JackH  Offline
Full Member

Joined: Sep 2007
Posts: 33
Vancouver, British Columbia
Hi David,
No picture came through. Tell us what kind of piano it is.
Maybe you can measure the diameter of the broken pin and make a new pin
using new round rod.


Jack Houweling
www.Jackspiano.com
604 970-3371
#1924958 - 07/10/12 05:59 AM Re: Upright damper rod hinges [Re: David, OHIO]  
Joined: Jun 2011
Posts: 812
Johnkie Offline
500 Post Club Member
Johnkie  Offline
500 Post Club Member

Joined: Jun 2011
Posts: 812
England
David :

I take it you mean the L shaped pieces of steel on the damper lift rod ?

You will have to remove the damper lift and use a punch to remove the broken piece, then replace with a piece of silver steel of the same diameter. It would be best if the steel was a couple of thou larger than the hole on the damper lift rod, you would then be able to get a really tight fit by heating the rod before fitting ( cherry red to expand the hole)... and when cooled down you will have a nice tight interference fit.

If not using that method, then just secure things using a little lead solder.

Best wishes - John


Concert Tuner & Technician for the past 49 years in the United Kingdom
and Member of the Pianoforte Tuners' Association (London)
www.jphillipspianoservices.freeindex.co.uk : E-mail jophillips06@aol.com
#1924975 - 07/10/12 07:58 AM Re: Upright damper rod hinges [Re: David, OHIO]  
Joined: Nov 2007
Posts: 6,828
Jerry Groot RPT Offline
6000 Post Club Member
Jerry Groot RPT  Offline
6000 Post Club Member

Joined: Nov 2007
Posts: 6,828
Grand Rapids Michigan
Hi David,

If the "L" piece is just loose, that is, twists inside of the damper rod itself, you can have it welded. I've done that for almost 40 years and have never had one re-break again yet. I can't think for the life of me of the proper terminology (so what else is new) for the welding part of it but a good welder will know it.

I always explain that it is IMPERATIVE that it is welded perfectly straight!!! The L MUST line up with the other L's on the damper rod. The last thing we need is for that damper hanger to be crooked even by a tiny bit or dampers will not lift evenly.



Jerry Groot RPT
Piano Technicians Guild
Grand Rapids, Michigan
www.grootpiano.com

We love to play BF2.
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#1924998 - 07/10/12 09:18 AM Re: Upright damper rod hinges [Re: David, OHIO]  
Joined: Aug 2009
Posts: 306
Chris Storch Offline
Full Member
Chris Storch  Offline
Full Member

Joined: Aug 2009
Posts: 306
http://www.youtube.com/watch?v=c5NPoXDXjUI

The PTG has a video on how to do this repair. Does this help?

Chris S.


Chris Storch
Acoustician / Piano Technician
#1925015 - 07/10/12 10:03 AM Re: Upright damper rod hinges [Re: Chris Storch]  
Joined: Oct 2008
Posts: 217
David, OHIO Offline
Full Member
David, OHIO  Offline
Full Member

Joined: Oct 2008
Posts: 217
Coshocton, Ohio
Originally Posted by Chris Storch
http://www.youtube.com/watch?v=c5NPoXDXjUI

The PTG has a video on how to do this repair. Does this help?

Chris S.


Chris, This is exactly the issue I have. 2 of the 4 hooks have broken. I didn't think to see if the PTG video's had anything on this. It's on a Kimball spinet. My client uses it for choir practice in her home for the past year and frustrating the pianist. Thanks to everyone! Good advice!


David Chadwick RPT
Coshocton, Ohio
1931 Mason Hamlin AA

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