3pt hitch with downpressure???

ledebuhr1 · Nov 2, 2003

Does anyone know if they have the same downpressure as they do lifting pressure?? I wonder if any of them could lift the rear tires of the ground.

KubotaBling · Nov 2, 2003

If the cylinder was same size. Assuming it had 2 i'd say at least 1000# even small lawn/garden lift cylinders are rated at 500# so 2 small ones would be at least 1000 assuming there larger i'd say 1500-2K # ??

art · Nov 2, 2003

Wildman, Thats I think what is called a top-n-tilt kit for using box blades and that type of equipment. It doesn't really give you down pressure but does improve the chances of doing the job a lot faster.

Wildman1 · Nov 2, 2003

Art, that correct. The hydraulic top link that he has is in addition to the down pressure kit.

Soundguy · Nov 3, 2003

I've seen aftermarket 3pt kits for antique tractors that were power up/power down if you wanted to pay for the double acting cylinder and valving.. but those were all retro kits for old farmalls and john deere's without lift.. etc.

Soundguy

ledebuhr1 · Nov 3, 2003

Thanks.

Im assuming they dont put downpressure from te factory because of liability. They dont want people putting so much stress on the 3-pt hitch that something breaks.

Ill ask my dealer about having one installed/

JackIL · Nov 3, 2003

I recently retired as an engineer with John Deere and have just checked with the current engineering staff on this question. No John Deere agricultural tractor manufactured in Waterloo, Iowa, has a 3 point hitch plumbed to provided down pressure. The source of confusion may be that the external lift cylinders appear to be 2 way cylinders. However one side of the cylinders is just plumbed to vent and therefore provides no down force capablity.

If there were down force capability, the support forces and therefore the traction forces on the rear wheels would be reduced--hardly what a tractor needs to pull.

I don't know what kits might be offered for compact tractors to provide down force, but they are not approved for full-sized ag tractors.

JackIL

davebar · Nov 3, 2003

I have a similar problem and was told that down pressure kits are not available under about 30hp. I have some very hard clay and in digging 90+ holes I found that rocking back and forth while "drilling" the hole would help some. Also lifting the front end with the loader (curl the bucket if necessary) often times provided the extra pressure need to get the auger to bite into the clay. Some of my holes however required a good rain to soften things up enough to get anywhere. If you have water avail you might fill the hole with water and come back to it. Some of my holes didn't get to full depth until the 3rd or 4th visit.

I also sharpened and ground a v cut in each tooth of the auger that did not seem to help to much though. In doing that it occured to me that an auger with only one tooth should have twice the cutting pressure and an auger with two teeth and might be able to break thru where a double tooth wouldn't. Anybody tried this or know for sure?

dave

ledebuhr1 · Nov 3, 2003

Dont large road graders and belly blades on plow trucks have down pressure?? If it would work on thoes, why not a CUT.

MossRoad · Nov 3, 2003

<font color="blue">Dont large road graders and belly blades on plow trucks have down pressure?? If it would work on thoes, why not a CUT. </font>

Think about where the blades are on graders and belly blades on trucks. If you lift the vehicle with the blade, the weight will be distributed between the blade and the rear tires. You'll still have traction.

On a tractor, however, if you lift the tractor with the rear blade, the weight will be distributed between the front tires and the blade. You will be taking traction off the rear tires.

But for a post hole digger, this would be OK.

ledebuhr1 · Nov 3, 2003

Your right, but i think you could still provide downpressure to a rear 3pt blade and have traction. There would be a fine line between too much downpressure and just enough. To much,and you will sit there and spin.

jrlichina · Nov 3, 2003

I put a Cat-0 3-point hitch on my old Simplicity Sovern and it had down pressure. It was very usefull when using my 3-point hitch backhoe I made. It really helped stabilize the whole machine.

Ron_NY · Nov 3, 2003

I have a Belarus 525 that I purchased new in 1990. The down pressure on the 3 pt hitch is strong enough to lift the rear wheels.

Ron in Central New York

Woodbeef · Nov 3, 2003

Both Fendt and Belarus have down pressure on their 3pth. certain IH tractors in the late 50s early 60s did also.

ledebuhr1 · Nov 3, 2003

If Belarus can do it why not Deere or Kubota?? I would think it would be a major selling feature.

KubotaBling · Nov 3, 2003

7020 does have down pressure it's electricaly controled and can be used for downpressure or dampening. I have the brochure and a local farmer has simular 4wd's that have them.

jmc · Nov 4, 2003

Dave,

The clay in my yard is so hard that during dry spells its hard to drive a stake into it. I tried to auger some holes during one of those dry spells and could not even get the cast auger tip to penetrate. (nevermind the sheeetmetal helixes- it never penetrated far enough for them to engage) Once those helixes engage, I think they help suck the auger into the ground by virtue of their geometry. Its just that on mine, they would need to overcome the flotation of that small, bullet nosed tip. No one would every think about designing a drill like that tip unless they were drilling mud. Next time, I'll grind some grooves in the tip so that it will cut to center. And like any drill or cutter- relieve it behind the cutting edge.

John

johnsonauto · Nov 5, 2003

no cut's with downpressure that i have seen, but befco came out with a down force kit for the posthole digger, will fit new and adapt to old befco models. Posibly it coul be adapted to other barnds of post hole diggers.

jerrym4 · Nov 5, 2003

I have been looking into this for a bit.

The local dealer had a Shibaura (grey) that had down pressure. Not sure if it was added on later or was built with it.

The Kubota sales rep for the area said Kubota was going to make it standard on the L series but research found that people would use it to a degree that the tractors suffered damage.

I'm thinking about adding my own. I need it for my box blade. I was just going to hook into my remotes.

ledebuhr1 · Nov 5, 2003

Kubota found out people might damage the tractors buy using it. This is prabally true, but with just the right amout of downpressure this problem can be elimanted.

Like if a CUT has a 2400lbs lift capacity at the 3ph hitch. Then maybe only have 1000lbs of downpressure. This would be enough to make the impliment work better, and not enough that it causes damage to the impliment or tractor.