Loose flange on let up? - NOT

[KCW]

Hi Mike and list,
	I bet it's the spring.  I was hoping that I wasn't the only tech
on earth who ever ran into this problem (let me know if I'm wrong).  The
spring is rocking up/down or back/forth due to the small gap between the
center coil of the spring and teflon.  In order to eliminate the clicking
noise you have to take out each of the clicking springs and tighten the
coils (or you can simply replace those springs).  I used a half-sharpened
shank to push out the teflon pieces, never use a plier because the teflon
will deform.  If anyone knows a better way, please let me know.  Oh, don't
forget to clean the spring groves and then regulate the spring tension.

Hope this helps

Kuang Wang

> 
>   >>>>>  Question # 1, clarified:
> Encountered 10/7/97, 35% realive humidity, a 1965 Steinway L, teflon
> bushed.  
> When the key is let go, on the up stroke, there is a loose flange type
> of a sound. After finding the flanges tight, my second guess was a loose
> hammer head, but those were also tight. I perceived the noise at a low
> level throughout the action, which is
> acceptable or at least bearable, but I perceived the noise at  a notable
> loudness on several notes, randomly, mostly in the midrange of the
> piano.
> 
> The noise is present with the action out of the piano, ruling out sharps
> hitting the fallboard.  The noise is present with the key isolated ( key
> held down immobile- while letting hammer drop down to rep lever), ruling
> out key bushings, key leads, and key to stop rail.  The random,
> non-consecutive appearance of the noise would rule out glides or loose
> rails.
> I thought, maybe the shank was hitting "tapping" the top of rep lever
> height adjustment screw , but when I held a piece of bushing cloth
> inbetween - still no improvement.  The "shank cushion?" is plenty soft. 
> I squeezed the knuckle with my pliars to test hardness, and concluded
> that it was about the same hardness as the adjacent non-clicky
> knuckle... next time, maybe I'll switch hammer assemblies to see if
> noise switches also.  I don't remember testing the tightness of the
> knuckle core in the shank ... I should have.  Could a loose telflon
> bushing cause a loud "woody tappy" noise like that?  If so, how would I
> test each bushing to know which needed repair?  I will check the
> regulation buttons at the next tuning.  The noise occurs without the
> jack moving away from it's rest position, ruling out the jack hitting
> the opposite side of the window.
> I will check out many of the suggested colliding parts that you have all
> mentioned.
> 
> Thanks,
> Mike Erickson, Tucson
> ----------------------------
>