From: "logisticky@NOSPAMyahoo.com" 
Newsgroups: misc.consumers.house
Subject: HELP replacing 'piston assembly' on toilet
Date: 4 Jan 2005 14:53:56 -0800
   posting-account=D8KpmwwAAACOzoPbp4c_jvPQtxYyC8_Q

I have the replacement piece but I cant figure out how to get the old
piece out. If you look at the diagram at

http://www.porcher-us.com/pdfs/porcher/parts/Parts_815.pdf

I have parts 4 & 5 removed, but I cant seem to get part "6" unscrewed
from the tank housing. It's loose but will not come out? There is
obviously a nut on the other side but I cant get it free. How do I
unscrew this bugger? Is there a tool I am missing? Do I have to remove
the whole tank to get this out? I have the replacement pieces and it
looks like there is a nut (unnumbered but is on the diagram) and a
gasket (#7)
Yeesh, I am longing for the old flapper days.

Obliged for your help!