Reply to "CNC Clutch Master Cylinder Help"

I have the same set up and experienced exactly the same thing. I had a hell of a problem with several things as noted in the post link below, one of which was just like your issue. For some reason, this master set up doesn't allow flow by just pumping at the slave (from my experience anyway). I eventually got flow from the master by continuousely pressing the pedal, then going to the rear and pumping some more, and repeating that process. It also helped when I pulled slightly on the slave arm and held it there, then released the slave vent screw and then pushed in the slave arm and tightened the slave vent screw again (and repeated this process several times). Also make sure you have the return spring connected through the process so it aids in pumping when you start getting some pressure. This was trial and error for me, I was puzzled just like you why I couldn't get the fluid. Try all this before you monkey with the master. I almost messed around with the master too, but glad I didn't go that direction.
http://pantera.infopop.cc/eve/...0045562/m/2120075985