pull plowing help

I have a JD 70, and a 2 bottom IH pull type plow (#114? I think). I hooked it up yesterday to try some plowing and it would plow after I made some adjustments to the two long pin release arms. Coulters I just rebuilt and greased, spin nice and adjusted to the heights of every other I have ever seen.

The issue is depth, I dont think that I am getting even close to deep enough. I am getting a furrow depth of about 6". It doesnt seem right to me, especially since I will likley wind up disking that stuff back up being its so close to the surface. I have the adjusting arm both on the maximum highest point.

I asked a neighbor, he said thats the problem with the old pull plows, they wont work right and cant go deep enough, and why guys use 3ph ones now (even though he has 3 bottom IH pull in the weeds). He said I need to hire someone in to plow it properly.

I dont buy it, the technology I am using is not that out of date and millions of good crops came from this equipment in the last 100 years.

Any help on getting more depth? There is one adjustment I cant figure out, its at the rear of the plow and seems to adjust the guiding wheel height?

Thanks,

Stu

Here is my plow.

-Can anyone identify the model so I can order a manual?
-When I say "Pin release arms" I mean the two main adjusting arms that you need to release a pin to lift or lower, when I say "guiding wheel height" I mean the rear trailer wheel that runs on a tilt.
-Also, one guy asked how long since the field was worked. Many moons, likeley 5-10 years. Its been llama and cattle pasture.

And finally, thanks a lot for the great responses guys, really appreciated.

So one guy mentioned that the rear wheel is adjustable to help with depth. I will look at that a bit too, but if 6 is good, heck we are there!

Thanks guys, a bit of confidence in something new is usually half the battle for me. I dont want to wreck anything or waste time growing weeds!!!

Maybe I will post a pic of the plow and some one can identify the model for me so I can order an operators manual. I have no idea except for some over the fence talk from a guy.

Stu

It is very difficult to plow deep in dry soil. As much of the country is dry, do you happen to have dry clay soil? It's impressive you got 6" deep if so!

Both of our pull-plows have a rock on them, about as big as a person could possibly lift. Really helps the down pressure.

Brand new plow lays help very, very much. Even good-but-1/2-wore-down lays will not penetrate well in dry hard soil. They might look good to you, but could be worn enough?

When lays were about shot, dad would heat the tip with the torch & bang down with a hammer. This made them wear faster &/or snap off on a rock, but it really pulled the plow down into the ground for a while again.

--->Paul