My question, is there a way to get downward force out of my 3ph?
Spivey,
Yes, there is a way but it takes some hydraulic modification. Not only that, but the upper lift arms may not be able to take the stress...although I'm not 100% sure about that.
The upper arms are what do the lifting of your 3pt. They are attached to the lower arms or "drag links" via a side link turnbuckle or hydraulic cylinder of some sort. So when the upper arms raise up, they bring the lower ones with them. On some tractors, the upper arms are on a spline and their position on the spline can be changed. I don't know about yours, but mine can do that.
Now, you could rotate the upper arms up by lifting the 3 pt all the way up. Then reposition the upper lift arms on that spline so they are lower or at the lowest point. Then if you had hydraulic side links, you extend the side links so they force the lower arms down to the ground, and the upper arms up. When the upper arms have gone all the way up, or the spline has come to it's end rotation, then the hydraulic cylinders will continue to push the lower arms down to the ground, depending on the length of their stroke.
When I installed my hydraulic side links I had that partially in mind. I got extra long hydraulic cylinders to be able to do that. Right now I can shove my boxblade down pretty close to the ground with the upper lift arms way up, but the boxblade is still a couple inches off the ground. I would have to relocate the upper arms on the spline to have it actually dig in, put I am very close to being able to do that as it is.
I did a thread on installing my side links and discuss the possibilities in it. It's an interesting idea.
You can visit it by clicking
HERE to read more about it.