Steinway M Backcheck Problem

[David Ilvedson]

If you are going by Spurlock...3 to 3.5 inch radius...you can make the circle on a piece of paper to get the curvature...



David Ilvedson, RPT

Pacifica, CA 94044









Original message

From: AlliedPianoCraft 

To: "Pianotech List" 

Received: 3/14/2008 4:46:24 AM

Subject: Re: Steinway M Backcheck Problem





Thanks for the suggestions on this. 



The thing that bothers me about this piano is that the backchecks come almost straight up from the key with a big outward bend at the top. I tried making a small bend at the bottom and taking away the big bend at the top, it didn't help in the bass, but helped somewhat in the other sections. 



All is regulated properly, touch, a soft spring return, etc. I checked the hammer shank pining and fixed a few of those and also check the balancier pining for tightness. 



I'll try working on the bench set up and reshaping the tails. The tails are quit rounded now. Do you think they should be a little flatter?



Al Guecia



----- Original Message ----- 

From: Willem Blees 

To: pianotech at ptg.org 

Sent: Thursday, March 13, 2008 1:08 PM

Subject: Re: Steinway M Backcheck Problem





 I had a similar problem with a D at the university. As John suggested, reshape and rough up the tails. Also check balancier pinning. But even when you've done all you can, I have seen this problem on brand new Steinways. So apparently it's something Steinway allows to happen. 





Willem (Wim) Blees, RPT

Piano Tuner/Technician

Honolulu, HI

Author of 

The Business of Piano Tuning

available from Potter Press

www.pianotuning.com





-----Original Message-----

From: AlliedPianoCraft <AlliedPianoCraft at hotmail.com>

To: Pianotech List <pianotech at ptg.org>

Sent: Thu, 13 Mar 2008 5:47 am

Subject: Steinway M Backcheck Problem





I am regulating a 10 year old Steinway M with all original action parts. I am having a problem with checking. The piano checks 100% on the bench, but no checking at all in the bass section and 85% OK in all other sections.  I have adjusted the angle on the backchecks with no success. Does anyone have any thoughts on what the problem my be and a possible fix?



Al Guecia





Supercharge your AIM. Get the AIM toolbar for your browser. 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080314/af323dc3/attachment.html