Here is a content suggestion done just for a FAQ:
Deere CUT Hydraulics Basics
Most Deere CUTs include a Dual Selective Control Valve as standard equipment. This is the 'joystick' and it is usually associated with the front end loader. Dual refers to the two pairs of ports, with four couplers usually just in front of the floor. Many other CUT brands do not include the valve on the tractor; it comes with the loader and is usually mounted on the loader's mast.
The DSCV can also be used to operate a variety of equipment. One pair can be used to raise and lower a mid mount mower. Both can be used to control a Top and Tilt on the 3 point hitch. Each function would have to be connected to the quick attach ports. Connecting a top and tilt this way leaves the loader disconnected.
A 3rd port is available, and is actually included in the factory valve assembly. This requires a control lever and plumbing to be used. Deere's factory solution puts the lever on the console just behind and below the joystick handle. The outlets are on the rear.
Fourth and Fifth ports can also be placed on the system. These go on the rear, also. They are actually the same original ports on the DSCV, but are selected using a switch and control solenoids. So the switch toggles the joystick from controlling the front (1 & 2) ports and the rear (4 & 5).
Finally, Deere offers a Power Beyond function. Power beyond uses 1/2" connectors and is designed for high flow/high heat applications which have their own open center scv; such as backhoes and wood splitters. In JD's setup, they install a loop-through connection where the dual SCV manifold would normally feed the
3PH control valve. To hook up the backhoe disconnect this short loop, connect the BH's input in it's place, and connect the BH's output to a connection that goes directly to the hydraulic sump. Note that the
3PH will no longer work (no pressure), but it has been removed to put on the backhoe anyway... (adapted from some posts by tom30519)
Of course, this is only a suggestion. I realize this isn't the final word and would be happy to get additional input. Including whether FAQ specific content is even necessary, in addition to links pointing directly to threads. Thanks Muhammad, you guys are awesome!