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Buzzing long hinges #611071
11/22/08 02:41 AM
11/22/08 02:41 AM
Joined: Feb 2002
Posts: 1,400
Orange County, CA
KawaiDon Offline OP
1000 Post Club Member
KawaiDon  Offline OP
1000 Post Club Member

Joined: Feb 2002
Posts: 1,400
Orange County, CA
I thought I would share an old fix, that some people may not have heard of.

As most technician's have experienced, long hinges in piano lids (grand or upright pianos) very often develop sympathetic vibrations. The resulting buzzes only on certain notes in the piano can really alarm new piano owners, and although just wiggling the lid usually stops it temporarily, people tend to feel it is a serious issue in the piano.

Today we received back a piano with a supposed incurable buzz in the top board long hinge. The technician had already installed a new hinge, but the new one started buzzing also. He also accidentally chipped the finish when putting the new hinge on (ouch!) so when the new hinge started buzzing, the owner started demanding that the dealer replace the piano. I sort of understand their feelings.

What is bothering me, though, is that the fix was so simple! I used a syringe to apply linseed oil in the openings in the hinge, where the brass is curled around the pin. After putting a bead of oil on, I worked the hinge back and forth for 15 seconds, then wiped the excess oil off. The buzz was fixed. 5 minutes work!

There are other techniques as well, such as removing the hinge pin and putting a curve in it. But the linseed oil is really ideal - it is slightly thick when applied, then gets thicker and sticky inside the hinge over a week or so, permanently damping any vibrations of the pin.

After tuning and regulating the piano, I played it for about 30 minutes to try to get the hinge to work into a vibrating position again, but it never did. In my past use of this trick over many years, I never had the noise return.

So if you haven't tried this method, give it a go. Works great! If only I could get the factory to do it before they ship out the pianos! I'm going to try again next week . . .


Don Mannino, MPA
Kawai America
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Re: Buzzing long hinges #611072
11/22/08 02:47 AM
11/22/08 02:47 AM
Joined: Apr 2007
Posts: 3,232
Olympia, WA
rysowers Offline
3000 Post Club Member
rysowers  Offline
3000 Post Club Member

Joined: Apr 2007
Posts: 3,232
Olympia, WA
Great tip, Don. I've had good results putting a greasy type lubricant on the hinge also. However, the linseed sounds particularly effective. Its also a "green" repair!


Ryan Sowers,
Pianova Piano Service
Olympia, WA
www.pianova.net
Re: Buzzing long hinges #611073
11/22/08 09:12 AM
11/22/08 09:12 AM
Joined: Aug 2008
Posts: 515
Windsor,Nova Scotia Canada
W
wayne walker Offline
500 Post Club Member
wayne walker  Offline
500 Post Club Member
W

Joined: Aug 2008
Posts: 515
Windsor,Nova Scotia Canada
Hi Don,
I spent many hours with the same problem years ago on a Young Chang U131. I finally called Paul Gilchirst at YC Canada and he told me to use linseed oil. Problem fixed in a matter of minutes.

Wayne


Wayne Walker
Walker's Piano Service
http://www.walkerpiano.ca/
Re: Buzzing long hinges #611074
11/22/08 11:36 AM
11/22/08 11:36 AM
Joined: May 2004
Posts: 2,018
Murphys, Ca
K
Keith Roberts Offline
2000 Post Club Member
Keith Roberts  Offline
2000 Post Club Member
K

Joined: May 2004
Posts: 2,018
Murphys, Ca
Thank you!!!


Keith Roberts
Keith's Piano Service
Hathaway Pines,Ca
Re: Buzzing long hinges #611075
11/22/08 12:09 PM
11/22/08 12:09 PM
Joined: May 2007
Posts: 1,645
D
Dave Stahl Offline
1000 Post Club Member
Dave Stahl  Offline
1000 Post Club Member
D

Joined: May 2007
Posts: 1,645
I know this one's going to be useful, probably in the near future, too. Thanks, Don.


Promote Harmony in the Universe...Tune your piano!

Dave Stahl, RPT
Piano Technician's Guild
San Jose, CA
http://www.youtube.com/watch?v=JAniw3m7L2I
http://dstahlpiano.net
Re: Buzzing long hinges #611076
11/22/08 12:38 PM
11/22/08 12:38 PM
Joined: Nov 2007
Posts: 6,828
Grand Rapids Michigan
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
Thanks Don! That should save some phone calls to Kawai as well from techs.

I used to remove half of the hinge, fall board or whatever hinge was the offending one. I would pull it out of one side 1/2 way. Then, rub Vaseline on it, slide it back in removing excess Vaseline as it went it. Then, I would tap it out the other side in the same manner, half way and doing likewise. The Vaseline took up any gaps there were inside of the hinge eliminating all future vibrations but, it was much more time consuming. This will be tons easier me thinks!


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

We love to play BF2.
Re: Buzzing long hinges [Re: KawaiDon] #2898402
10/08/19 11:08 PM
10/08/19 11:08 PM
Joined: Apr 2019
Posts: 133
Great State of Texas
V
vara411 Offline
Full Member
vara411  Offline
Full Member
V

Joined: Apr 2019
Posts: 133
Great State of Texas
Thank you so much for this suggestion!

Question: what kind of linseed oil is ideal for this? Apparently there's all kinds of varieties... refined, cold-pressed, drying, standing, thickened... not sure which to get! See below...

https://www.amazon.com/gp/product/B...3ef368b&pf_rd_r=6TWDS3DCEC4Y5DXY48VB

Last edited by vara411; 10/08/19 11:08 PM.

Yamaha AvantGrand N3X
Re: Buzzing long hinges [Re: vara411] #2898543
10/09/19 09:38 AM
10/09/19 09:38 AM
Joined: Sep 2010
Posts: 41
Maine
S
Scott E Offline
Full Member
Scott E  Offline
Full Member
S

Joined: Sep 2010
Posts: 41
Maine
I would just get regular boiled linseed oil that you can find in a hardware store.

Re: Buzzing long hinges [Re: KawaiDon] #2898614
10/09/19 12:23 PM
10/09/19 12:23 PM
Joined: Mar 2018
Posts: 354
Texas
Dr. Rogers Offline
Full Member
Dr. Rogers  Offline
Full Member

Joined: Mar 2018
Posts: 354
Texas
Thank you for sharing this tip. The hinges on my Baldwin SD-10 tend to buzz, especially when the lid is closed. When it happens I either ignore it or press a little on the pin, which stops it for a while.

What sort of syringe do you use for this, and where would one get such a syringe?


Austin Rogers, PhD
Music Teacher in Austin, TX
Baldwin SD-10 Concert Grand "Kuroneko", Baldwin Upright, Yamaha P-255
Re: Buzzing long hinges [Re: KawaiDon] #2899294
10/11/19 04:07 PM
10/11/19 04:07 PM
Joined: Jan 2014
Posts: 175
Washington State
AWilley Online content

Full Member
AWilley  Online Content

Full Member

Joined: Jan 2014
Posts: 175
Washington State
Syringes aren't hard to find. I just saw a 15-pack on Amazon with an assortment of blunt tipped needles for $5.


Anthony Willey, RPT
PianoMeter
Willey Piano Tuning

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