hosted on condor3913
 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
MMD > Archives > December 2002 > 2002.12.23 > 07Prev  Next


Leaking Exhauster Valves
By John A. Tuttle

Hi All,  I'm curious to know how Doug determined that the inside flap
valves are leaking.  First off, such leakage is quite uncommon.  In
fact, it's more common that the wood itself is leaking rather than the
inside flap valves.  And before going any further, according to the
Gulbransen Service Manual the inside flap valves are located inside
of the exhauster bellows.  So, it's impossible to access them without
opening the exhauster bellows.

A common problem with the Gulbransen Exhauster Assembly is leakage at
all of the points where two pieces of wood come together (the joints
and the seals).  Being what I call a 'high vacuum-low volume' assembly,
small leaks can cause big problems.  Because of its construction, it's
one of the few lower sections that can hold a vacuum for over a minute
when properly rebuilt.

My suggestion is to look for and repair/seal all of the joints in the
assembly before tearing the unit down.

Lastly, you can purchase the Gulbransen Service Manual online at
  https://www.buysecure.com/playercare/reprints.html#gulbransen

Musically,

John A. Tuttle


(Message sent Mon 23 Dec 2002, 13:27:28 GMT, from time zone GMT-0500.)

Key Words in Subject:  Exhauster, Leaking, 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 1995-2022 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

Pay via PayPal

No PayPal account required

                                     
Translate This Page