stimpee, hooking into the hydraulics is quite easy. You only see three hoses on the hydraulic block because the forth is hidden away.
Your B3030 should plumb pretty much the same way.
There are three hoses that are connected between the hyd block and the loader. One provides pressure fluid to the loader (IN port on the loader valve). One returns used unpressurized fluid back from the loader to the tank (OUT port of the loader) and one that returns unused pressurized fluid from the loader to the next valve in series (PB port of the loader).
The loader is the first valve in series and the 3PT valve (internal) is the last valve. So the loader's PB effectively feeds the IN port of the 3PT valve.
What you need to do is add a new valve in series between the loader and the internal 3PT valve.
To do this:
- Look in your manual to find out which port on the hyd block of the tractor gets the pressurized fluid from the loader. Typically this is the one closest to the rear of the tractor. I think this is labelled (FROM Implement) or something along those lines.
- Unhook this hose from the hyd block and the loader valve. Where it hooked to the loader valve is the PB port of the loader. If you look carefully on the loader valve chances are the PB port of the loader valve is labelled as such.
- Now replace this hose with a longer hose that goes from the PB port of the loader to the IN port of your new remote valve.
- Route a hose from the PB port of your new remove valve to the hyd block where you disconnected the old hose from the loader.
- Once you've done this, your new valve has been added in series between the loader valve and 3PT valve.
- You also need to route a hose from the OUT port of your new valve to the tank to return used hyd. fluid. You can do this in one of two ways. Kubota makes a port plug and O ring that fits right on the spot where you would fill hyd fluid and replaces the plastic cap there. Alternatively you can tee the tank line on the hyd block of the tractor that the loader returns used fluid to (again look at the owners manual for which one is the tank line). Note this is the only line that may be teed as it contains unpressurised fluid.
We'll be happy to help if you have any other questions.