foot pump windsheild washer

Then it could be sucking air between the foot pump and the tank. Oh, is there liquid in the tank? I still have the same setup on my car and it works fine, but I bet if I disturbed those old lines it might not.

I would venture a guess that there may be a tear in the line from the tank to the pump.

edit: It could be that you need to cut a short piece off of the line and put it back on the old rubber hoses probably have a stretched memory to them.