This thing is driving me crazy. I can't get the master cylinder to pump fluid out of the top reserve chamber. The little holes are open. I checked that. The piston seems to be hanging up. When I have it off the truck, I can push the cups and the piston toward the push rod, but then it is very hard to push them the other way using the rod. All the parts look fine and the cylinder is perfectly smooth. Has anyone ever run into anything like this before? I keep thinking I must be putting it together wrong, but It's so simple, I don't see how that's possible. Various suppliers have master cylinder kits, but they come in different sizes, and I don't have any way to accurately measure the inside of the cylinder. Does anyone know what size I need?
