slow returning hammers

[Isaac sur Noos]

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Protek experience : after a few weekswhere the parts seem to be free the
sluggish hammers are totally blocked, then you have to do what was necessary
in the first place, repin. German techs use Ballistol, some (cheapo's)use
WD40 ( the flanges are contamined afterthat, good luck for repinning ,
changing them may be necessary)

With humidity it is fairly possible that corrosion is installed on the pin,
(with time also, and that the nicel plaiting is worn).
No lube can work in this case.unfortunately.
May be the springs are too weak to help, may be also the action position
does not help the hammer to come back.
As others have say you have to be sure of where the problem come from in the
first place (and avoid also too free pinning ).

May be ke keyboard is pushing on the whippens too much and the hammers have
been lightened by filing, then the initially slow action became sluggish.

Repinning is not that long, but all the traveling and aligning of the
hammers afterthat turns it to a larger job that that...

Hope that helps.

Isaac OLEG




                       Pianotech

                        Isaac OLEG
                        accordeur - reparateur - concert  19 rue Jules Ferry
                        94400 VITRY sur SEINE
                        oleg-i@noos.fr  tel:
                              fax:
                              mobile:  033 01 47 18 06 98
                              33 01 47 18 06 90
                              033 06 60 42 58 77




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  -----Message d'origine-----
  De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la
part de Alpha88x@aol.com
  Envoye : dimanche 21 decembre 2003 05:32
  A : pianotech@ptg.org
  Objet : slow returning hammers


  Greetings,

              I went to a home where there was a Chickering console piano
that the hammers return at a snail's pace after the key is struck. I
suggested that the hammer bushings around their center pins may be swelled
due to humidity resulting in tightness and friction causing the slow motion
return.  He had a heater bar in the piano and I suggested that he plug it in
to dry up some moisture. He did. Two weeks later he calls and tells me it
only helped allittle and the thing is still unplayable.

               I am thinking that the only thing left to do is to bring the
action home and put it near a radiator so they dry out, and give each pin a
shot of protek. Any other suggestions?

  thanks,
  Julia Gottchall,
  Reading, PA





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