Describe what happens when you push down on the brake pedal with all the force you can give it and try to "hold it".
Secondly, how far does the pedal travel before it stops and you cannot push it further?
Finally, does it go all the way to the floor when you push it down with all your force?
And remember, just because you can't "see" a leak doesn't mean there isn't one. There are so many connections in this "hydraulic system" that it will take a careful study to figure out just where the weak/leak point is.
