To build it out here are the numbers off of JD's website.
LVB26032 - $1,011 EH 3rd function kit for open station. What you will get is a switch on the console by the cruise switch that activates it. A valve and couplers that are on the left side ROPS, you can see in my pictures above. And the the thumb switch on the joystick you can see in my pictures. This is the hydraulics you will want to operate your 4 in 1. You can open and close it with your thumb while manipulating the loader with the joystick. You will like this. It also includes a weather proof 12 volt outlet they mount by the cup holder, make sure they do this, it comes with the kit but they have to drill the hole to put it in. I used a hole saw worked perfectly.
Code 9049 or bundle BW16139 - $361 - hardline and hose kit with couplers to run your 3rd function to the front of the loader. You can also see this in my pictures above. You will get the hard lines and hoses that bring the couplers up to the right hand side of the loader. You will get a new bracket where the loader couplers are so that you can quick disconnect this if you remove the loader. You will get the hoses from the bracket and couplers to run to the rear and plug into the 3rd function mounted on the ROPS, you can see in my pictures above.
LVB296161 - $1,124 Top and Tilt kit. This will be two cylinders and hoses and attaching hardware to make up the top and tilt for the 3pt hitch. It says you need diverter, but read on below.
Here is where you need to make a choice. How do you want to control the top and tilt. With the diverter, you will hit a switch and then the loader is inactive and the joystick will control the top and tilt cylinders in the rear. This may be a good option since the joystick is ergonomic and intuitive, move it left and right to tilt left and right. Move it forward and backward to angle up or down. If you go this route it will be kit LVB26077 and will cost $1,344.
Now, you can add the 4th and 5th separte valves and control the top and tilt with these, the kit is LVB26037 and cost is $775. The catch on this is that you will control your top and tilt with two levers. If you think you will be turned sideways in the seat looking back a lot while using them (running a boxblade or rear blade) this may not be a bad option either. Picture of the levers is below.
Basic difference between the diverter option and the 4 and 5 option is with diverter you do ALL hydraulic functions with the joystick and you can't top and tilt and run loader at the same time (not a big deal, you don't have enought hands - I hope - to be able to do that with either). 4 and 5 you will control your top and tilt with two extra levers on the right and a little cheaper.
Other options I would consider while you are building it out -
Ehydro - It is awesome, I love it.
Armrest kit, I wish I had gotten this, I will be ordering and installing it soon.
Front and rear worklights, I did not order this. I did install rear worklights on mine using the factory harness, only reason I did not go factory I had two new LED tractor worklights I got free, so far so good. I end up feeding roudbales a lot at night since I have a day job. Front headlights are useless with a round bale on the spear out front.
If you have any more questions let me know, I have a 2011 model 4120 open station I got about this time last year. It is the same as what you are getting just less horsepower.
