Colby,
I just thought I would explain the tractor hydraulic circuitry a little more. A tractor without a loader has a pressure line feeding the
3ph valve and a return line to the reservoir from the
3ph valve. When they add the loader they remove the pressure line from the
3ph and feed the loader valve from it and the loader valve has a return line to the reservoir, and a power beyond port which goes to feed pressure to the
3ph. What the Case dealer is talking about is since you can't use your
3ph while the backhoe is on, they disconnect the power beyond line from the loader valve to the pressure port
3ph valve and feed pressure to the backhoe from it instead. The backhoe the then has its own line to return to the reservoir. On this setup you have 3 line to the back of the tractor 1 pressure line from the power beyond port on the loader valve with a female quick coupler. 2 a return line to the reservoir with a male quick coupler. These 2 will be your pressure and return lines for your backhoe. 3 will be a line from the
3ph valve pressure port with a male quick coupler and a little longer than the other two lines. When you remove the backhoe you will loop this 3rd line arround and plug it in to the pressure line from your loader valve power beyond port, thus reconnecting your
3ph feed. So in essence what you are doing is disconnecting your
3ph valve (as it isn't used when the backhoe is on) and connecting the backhoe valve instead and when you remove the backhoe you are reconnecting the
3ph valve. I hope I have explained it well enough.