Soundguy said:
Hmm.. 3pt hitch geometry and draft control should have HELPED keep that tractor stuck to the ground... the plow rotating should put the toplink in tension, leveraging the tractor front down, using the rear axle as the fulcrom pivot.
soundguy
That works UNTIL....I've been on a few old Fergies, N's, and the like, with a plow that's just a little too big for the conditions, and then, draft control and/or 3-point hitches and all it wonders just aren't up to the challenge. Instead of stopping the tractor cold in it's tracks like "too big of a drawn plow" would do, too much mounted plow will make that tractor dig for traction even to the point where the front end starts to climb.
The smaller the tractor, naturally, the easier it is to overload, but the phenomenon isn't limited to small tractors.
Back when I had my 5000 Ford, after it was turbo-ed, I tried to pull a 5X14" mounted plow with it. Long story short, the front wheels didn't spend a lot of time on the ground. It was simply too much plow for the tractor, in spite of 3-point hitch, 100 hp, and all sorts of front weights. I went back to 4X14" 's and plowed 1 gear higher with better results.
Too much is still too much, no matter what sort of mechanical advantage you're dealing with. Take draft control out of the equasion and the problems are amplified.
Barney, Without the aid of draft control, it's much easier to exceed the tractors capabilities in certain plowing conditions. While using a gauge wheel on a mounted plow, the plows "suck" (downward pull) is somewhat negated as a tractive advantage. You're carrying that weight/downward force of the plow on the gauge wheel in place of on the rear of the tractor. At that point, you have a "drawn plow" that is attached to the draft arms instead of the drawbar. Now you can see why Harry Fergusons invention was such a revolutionary concept and a giant step forward for heavy draft loads on small tractors.
When plowing, the 3-point hitch system is somewhat less effective without the assistance of draft control. Then you're back to the stone age of mechinized farming with a simple drawn plow. Then you rely on shear weight and brute HP to pull a plow.
In the end, weight is weight. Be it in the form of a front loader or suitcase weights, you probably won't see significant difference.
And one more thought. If the plow has even a hint of nose down attitude, it will tend to dive, causing the tractors front end lift. Even with the gauge wheel to resist the diving, you're creating significant resistance to forward motion with the plow being nose down. Try lengthening the top link ever-so-slightly to see if that helps. When a 3-point mounted plow is adjusted PERFECTLY, and plowing conditions are right, the top link is ALMOST "slack". The more compression applied to the top link, the more likely the draft control is overloaded, or the LACK OF draft control is exagerated.