I would love to have a grapple. One big hurdle, other than money is how to control it.
I have been trying to solve this riddle. Here is what I have found. Others will be reading this they might either not have a clue and this will help them, or if I am wrong the Smart Ones can correct me!
Your loader is controlled by the DSCV (dual selective control valve) which controls two pairs of remotes On your loader that raises and lowers the boom. And it curls and uncurls your bucket.
But the valve block has a 3rd function built in. This is a likely suspect for running a grapple. It is in the valve block, but needs a control lever and the plumbing to be used. Deere's factory solution puts the lever in front of the rockshaft control lever (between the seat and fender). The ports go on the back, above the 3point.
That setup is fine for a hydraulic toplink. But it means that the hoses for the grapple need to run to the back, and to operate the grapple you keep taking your hand off the joystick to operate the grapple. Which is fine, but you usually would like to do both at the same time. Now if you have three hands...
Another solution is a diverter. This is a switch that actuates solenoids on the same pair of ports controlled by the existing joystick. Hit the switch and the joystick toggles from operating the loader to whatever the second function might be. The remotes are in the rear again and this would be really handy for a top and tilt. Not perfect, because you still might like to have control of the loader, but almost perfect in real life.
But still, you have to take your hand from the joystick to mash the switch (which is likely to be in the same area as the 3rd control lever, but since this is an electric switch (the 3rd is a cable operated thing) It could go elsewhere. Maybe you can get it up on the joystick...
Which is available as the Fasse setup. This is the diverter which has the switch on the joystick handle. More handy than the fender mount, but still not perfect.
Perfect might be having the 3rd function controlled by a lever on the DSCV joystick. The cable might even be able to route part of the way through the stick itself. No one does this that I have seen, likely for good reason. No one ever accused me of having good reason... I am toying with this idea. It seems like it would be fairly low cost, and if it worked would be Very Handy.
BTW - A whole 'nuther angle is adding an additional new block, with its own levers. You'd end up with levers everywhere, and a plumbing mess, but everything could work at once, especially if the levers were down by your left foot! Hey, I rarely use my brake; maybe I can change the pedal into valve controls...
