Welcome to the Piano World Piano Forums
Over 2 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Gifts and supplies for the musician

SEARCH
the Forums & Piano World

Trying Something New with Search
(ad) Pianoteq
(ad) Pearl River
Pearl River Pianos
(ad) P B Guide
Acoustic & Digital Piano Guide
(ad) Lindeblad Piano
Lindeblad Piano Restoration
Who's Online
125 registered (ando, agoriaket, anamnesis, Amosdoll, 36251, 35 invisible), 1357 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
(ad) Estonia Piano
Estonia Pianos
Quick Links to Useful Piano & Music Resources
Our Classified Ads
Find Piano Professionals-

*Piano Dealers - Piano Stores
*Piano Tuners
*Piano Teachers
*Piano Movers
*Piano Restorations
*Piano Manufacturers
*Organs

Quick Links:
*Advertise On Piano World
*Free Piano Newsletter
*Online Piano Recitals
*Piano Recitals Index
*Piano & Music Accessories
*Live Piano Venues
*Music School Listings
* Buying a Piano
*Buying A Acoustic Piano
*Buying a Digital Piano
*Pianos for Sale
*Sell Your Piano
*How Old is My Piano?
*Piano Books
*Piano Art, Pictures, & Posters
*Directory/Site Map
*Contest
*Links
*Virtual Piano
*Music Word Search
*Piano Screen Saver
*Piano Videos
*Virtual Piano Chords
Sheet Music
(PW is an affiliate)
Sheet Music Plus Featured Sale
Topic Options
#2045187 - 03/08/13 05:14 PM Steinway sostenuto
BEN120N Offline
Full Member

Registered: 02/12/12
Posts: 30
A Steinway D grand that I tune regularly has a noticeable knock when the sostenuto pedal is pressed. Two Steinway technicians who service the piano have denied its existence. Any ideas?

Top
(ad 568) PTG Grand Action Regulation in 37 Steps
PTG Grand Action Regulation in 37 Steps
#2045214 - 03/08/13 06:15 PM Re: Steinway sostenuto [Re: BEN120N]
Gene Nelson Offline
1000 Post Club Member

Registered: 09/10/04
Posts: 1661
Loc: Old Hangtown California
Check the rod mounting brackets for missing or damaged bushings.
Or look at or feel the damper blocks to see if any are being bumped when the rod rotates.
_________________________
RPT
PTG Member

Top
#2045221 - 03/08/13 06:23 PM Re: Steinway sostenuto [Re: BEN120N]
Ed Foote Offline
1000 Post Club Member

Registered: 05/03/03
Posts: 1438
Loc: Tennessee
Greetings,
I would agree, if the knock is heard as you depress the pedal, with no keys touched,and you hear a knock, there is a damper tab that is being grazed by the sos. blade, or,the blade could be catching the edge of the back check on the the very ends of the rod.

If there are a couple of tabs being grazed, and they are adustable, papering them down will remedy the problem. That assumes the underlevers are hanging at the right height. It might be loose bushings in the rod brackets, it could be something in the trap work.
Good luck,

Top
#2045237 - 03/08/13 07:08 PM Re: Steinway sostenuto [Re: BEN120N]
kpembrook Online   content
1000 Post Club Member

Registered: 04/06/10
Posts: 1450
Loc: Michigan
Originally Posted By: BEN120N
A Steinway D grand that I tune regularly has a noticeable knock when the sostenuto pedal is pressed. Two Steinway technicians who service the piano have denied its existence. Any ideas?


Possibly a keyframe bedding problem. When the pedal is depressed the keybed can flex downward, creating a gap between the glider bolts and the keybed.
_________________________
Keith Akins, RPT
Editor, Piano Technicians Journal
USA Distributor for Isaac Cadenza hammers and Profundo Bass Strings
Supporting Piano Owners D-I-Y piano tuning and repair

Top
#2055766 - 03/28/13 04:09 PM Re: Steinway sostenuto [Re: Gene Nelson]
BEN120N Offline
Full Member

Registered: 02/12/12
Posts: 30
Re. Steinway sostenuto knock.

Thanks for all the advice. I've been to the piano today. After having been sure in the past the rail was not catching any lips, today one was jumping up.

Having adjusted the rail to stop this, the knock has gone!

I feel a bit dim not to have realised the rail could knock without visual signs.

The day you stop learning something is the day to do something else!

Thanks again.

Ben Nolan

Top

Moderator:  Piano World 
Shop our Store for Music Lovers!
Back to School Music SALE!
Save 10% in our online store
.
Just enter SAVE10 in the coupon box during checkout. *
And YES, you can save 10% AND still get free shipping on Jansen Artist benches!
PianoSupplies.com is Piano World's Online Store
Please visit our store today.
* Sale does not apply to advertising, how old requests, or any non-tangible items. Can not be combined with any other promotions. Ends August 31, 2015
(ad) Teaching Children Music
Teaching Music to Children
(ad) Yamaha Stage Pianos
Yamaha CP4 & CP40 Stage Pianos
(ads) PD - WNG - MH
Wessell Nickel & Gross
(ad 125) Sweetwater - Digital Keyboards & Other Gear
Digital Pianos at Sweetwater
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
New Topics - Multiple Forums
Natalia Strelchenko tragic news
by Tweedpipe
09/01/15 08:47 AM
Any jazz pianists know how to play this?
by mc9320
09/01/15 08:16 AM
Audacity driving me bonkers
by JimF
09/01/15 08:14 AM
Kawai CA17 vs CA67
by pe2Dave
09/01/15 06:02 AM
Busoni Piano Competition
by fnork
09/01/15 05:36 AM
What's Hot!!
Posting Pictures on the Forums
-------------------
Forums Rules & Help
-------------------
ADVERTISE
on Piano World

The world's most popular piano web site.
-------------------
PIANO BOOKS
Forum Stats
80,587 Registered Members
44 Forums
166,592 Topics
2,440,947 Posts

Most users ever online: 15,252 @ 03/21/10 11:39 PM

Visit our online store for gifts for music lovers

 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
|
Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World | Donate | Link to Us | Classifieds |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter | Press Room |


copyright 1997 - 2015 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission