New steering box fitted but still leaking.

I had my local landy garage fit me a recon steering box I took it home and noticed its still leaking but from the middle of the engine and passenger side front now. I took it back and he said he thought it was the oil cooler for the auto gearbox this time so I booked it in for next week. But I checked my pas fluid today and it was nearly empty. So its still leaking from the steering system but dripping from the middle and passenger side now. It's baffled him for now till he has a look. Any ideas what it could be leaking from now? cheers. td5

check reservoir and pipe from it to pump and pump