Crane 4401 toliet leaks around flapper.. however it does not have a conventional flapper.. it has a round open ended device that is supposed to lift and float back down and close so the tank can fill. I think it is a design problem. what is the solution? looks like I will have to take the tank off to replace the device..

SOURCE: My Crane toilet is slowly leaking into the bowl.

Check your over flow pipe in the tank to see if you need to lower the water level amount in the tank. If thats not it, it could be the seal thats under your flapper between the tank and base. Simple fix just alittle time consuming

SOURCE: I have a crane 3-575

That would mean the actual tubing itself has a leak in it or has just worn out. You can replace the whole line there with a new one, I doubt it's the attachment side which is part of your toilet. You are going to want to look into a new line, just head to home depot or lowes (or any hardware store) and get one.

Thanks
Tim