Oval is pretty much bad news Those passages will not seal without the oring.
Dan
Well, it took a while, but you were right, not that that's a surprise. It wasn't a serious leak, just weeping but I hadn't put any real pressure on the hydraulics either.
It's getting to be time to hit the driveway with the box blade and that WILL require some serious hydraulic pressure so I figured I'd better fix it before I needed it.
Of course it was the innermost O-ring between the first remote and the manifold on the tractor so EVERYTHING had to come back apart.
The good news is that I learned a few things about the process the first time so reassembly went much more smoothly. Valve block is back together, all I have to do is reassemble the control linkages and put the wheel back on. That shouldn't take more than the rest of the day...