Small power steering leak

[Big monk]

Noticed this afternoon my truck leaks a little power steering fluid, only when its running. The leak is not a bad one, no more than a quarter's size worth. Got under the truck and found where it seems to be coming from. I'm guessing the steering box is in front of the radiator, midway between the links. ( doubt that was any where near close). Time for a rebuild or replacement?. also what grade of power steering fluid does it call for. Any suggestions?

 

[F-250-Owner]

is it coming out of the hydroboost assist line in the bottom? get one from Rockauto, also when you do it...flush your system as well.... it will be as good as new