Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info

End-of-Year Fundraising Drive In Progress. Please visit our home page to see this and other announcements: https://www.mmdigest.com     Thank you. --Jody

MMD > Archives > June 1998 > 1998.06.21 > 11Prev  Next


Exhauster Pump Flap Valves
By Bryan Cather

Recently the Starr player piano at the museum where I am a volunteer
developed a problem with the flap valve on one of the exhausters, and
occasionally would give no resistance to a pedal stroke.  The local
tech I called offered to save me the cost of a service call and told me
to look at the flap valve, and make sure is was in place.  He said if
it still didn't work after I made sure it was OK that he'd come out and
have a look.

As it turned out, the flap valve was (and is) the problem.  The little
spring that holds it in place had somehow been moved out of its proper
place, and a bit of diddling with this spring took care of the problem.

Well, at least most of the problem.  The flap valves are not flat
against the bellows board, but are rather wavy, and, although they seem
to work reasonably well, I wonder how much leakage there is.  They are
about ten years old, and I wonder if there is something (mink oil,
perhaps?) that I could rub into them to make them more airtight?

There is one other problem with this piano:  The nipple that connects
the sustain pneumatic to the "sustain pedal button" on the key slip is
a bit too small.  I fixed it temporarily by shimming the nipple with
a bit of tape, but this obviously won't last, and a bit of work form
the "Jacque Legg School of Player Repair".  My question is; what is the
preferred material for sealing this slightly undersize nipple into this
slightly oversized hole?

All you help is appreciated

Bryan S. Cather
BSnakeC@aol.com

 [ Hmmm.  My modern dictionary says "Jack Ketch - a public hangman,"
 [ but gives no explanation nor origin of "Jack Leg", connoting a
 [ makeshift or temporary repair.  Anyone know?  -- Robbie


(Message sent Mon 22 Jun 1998, 00:39:36 GMT, from time zone GMT-0400.)

Key Words in Subject:  Exhauster, Flap, Pump, Valves

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2024 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Please Support Publication of the MMD with your Generous Donation

Pay via PayPal

No PayPal account required

                                     
Translate This Page