Hi, I am currently restoring a Gulbransen pumping unit that was
previously poorly rebuilt.  Art Reblitz says in his excellent guide:

  "When you break the four bellows off of the trunk you will find a
  piece of seal cloth between the right hand reservoir and the trunk.
  Note its position and be sure to replace it."

However, this is missing and there is no indication of where it might
have been and I'm having trouble envisaging its location.  Can anyone
help me out please?  Any photos out there?

Many thanks,
Stephen Powell, RPT
New Zealand