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Noisy shift on Hamburg C

  • 1.  Noisy shift on Hamburg C

    Registered Piano Technician
    Posted 19 days ago
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    This issue is driving client ( and me) crazy. The action makes a "sshk shhk sound going both in and out of shift position. It seems like somewhere there is too much friction, so as it shifts it does so in steps that sound like a click. I can make it make the noise without using pedal, just using a screwdriver to move it over and back. Not the dags. Glide bolts set properly. Teflon powder on key bed.
    Anyone have any tricks? The rebuilder has been here from NY twice work on it, noise goes away, then comes back. Client plays a lot of chamber music, room is heavily carpeted so easy to hear the sound in a quiet room 

    David Graham
    Graham Piano Service, Inc.
    512 S. Main St.
    Sycamore IL 60178
    815-353-5450




  • 2.  RE: Noisy shift on Hamburg C

    Registered Piano Technician
    Posted 19 days ago
    Just speculating, but have you run your fingers all around the underside of the keyframe and the keybed. Look for a small piece of dirt of some sort that might be making the noise, that cannot be seen with the naked eye. 

    Wim



    Original Message


  • 3.  RE: Noisy shift on Hamburg C

    Registered Piano Technician
    Posted 19 days ago
    With everything else you’ve done, I assume you checked the return spring and side of the keyframe.

    Kathy


    Original Message


  • 4.  RE: Noisy shift on Hamburg C

    Registered Piano Technician
    Posted 19 days ago
    At one point I took the spring out and flipped it to see if the divot in key frame was the issue but no. Problem remained. Teflon powder helps the key frame move, but it still has a hesitation as it goes each way. 
    As for dirt, I think it is the cleanest key bed I have ever worked on. I should add that the problem will persist even when the keyboard is pulled out enough that there is no contact with the dags, so they are the cause of the friction. 
    David Graham
    Graham Piano Service, Inc.
    512 S. Main St.
    Sycamore IL 60178
    815-353-5450





    Original Message


  • 5.  RE: Noisy shift on Hamburg C

    Posted 19 days ago
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