i have somethin to add.
I am not SURE about pumping your brake system clean of fluid. That might be bad because all that air is in there. I THINK i heard somewhere before that you can add new brake fluid to your reservoir and pump and pump until you see CLEAN fluid....but that wont help if the new fluid is the same color as the old...depends on the age of the fluid.
Hope that helps..sorry i dont know anything...it looks like i'm the only one trying to help you out here!
Dave