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How much H.P.?

F

Fordfarmer

Well-known Member
Just pulled a DMI Tiger-Two disk-ripper home for my cousin. 5-shank, disks front and back. The Ford FW60 he bought will play with it (335 h.p.), but I was wondering just how much h.p. these things actually need. I pulled a 5-shank ripper (in-line? V? Don't remember) with a Ford 9600, and had the power, but was a bit limited on traction. Pulled the same ripper a couple years later with my TW35 (fwa) with no problem. I know this disk-ripper will need more power than that ripper I used, but how much? Any chance of my TW pulling it in good conditions?
 
I have a five shank DMI disk ripper like your talking about. To really pull it right in hard ground your talking about 200 HP to keep any speed up.
 
Thanks. Didn't really figure my TW would be enough, but thought I'd ask. Our top 8-10" isn't bad - I can pull a 5x16 plow with 85 h.p. (but that is right at the tractor's limit for both h.p. and traction), but a little below that is really tough clay. I'll just let him play with his big tractor.
 
Around here on the heavier soils you want around 250 PTO HP for a DMI (or CaseIH) 527 or 530 Ecolo-tiger. This will allow a person to go to the bottom of the topsoil layer at 4 plus MPH. I run a 5 shank zone builder when the conditions permit with a JD 8430 articulated tractor. I am satisfied with the results even though the soil lifting action is considerably less. I have not tested for this but believe the zone builder has less a negative impact on soil organic matter versus other primary tillage tools. The only thing is that I wish I was not so limited by wet soil conditions which limits or negates any benefits with the zone builder.
 
Wow. I pulled a 4-20 with a tw20, and it pulled hard at times. The 85hp 7700 worked hard with a 4-16. Really can't think of a ripper unless a person had big hp around here. See a few 3-shank around from time to time.

Paul
 
Different soils really work differently, don't they? My Grandpa pulled a 5x14 with his Commander 6000 (67 pto h.p.) and traded up to a 5x16 SAR a few years after he traded the 6000 for a 7000. Neighbor with a 7700 pulled a 4x20. I still have a 5x16, but play with it behind my TW35. It would pull it in 6th, but that's just way too fast. I'll buy a disk-chisel before I spend the money to get a bigger moldboard plow.
 

The 10A JD single shank ripper with the 10” wide chisel point goes full depth right to the hitch on my 1640 Deere in pure clay. Makes it work it 3rd gear but will pull it in 4th. Breaks shear pins on rocks In 4th however .
 
We run a DMI disc ripper such as you describe with a FW60, it pulled it ok in 9th gear with the vt903 but we have since transplanted a cummins ntc400 in it and now can pull in 10th but the tractor still has all it can handle with it. we have some clay ground that we'd be better off making bricks rather that crops with and needs the hard pan busted up every year, it's about 75acres, when it comes time to rip that plan on bringing breakfast, lunch, and supper oh and don't forget the fuel trailer. His Fw60 should handle it. What does he have for tires on the tractor? We run 20.8-38 radials with duals and no fluid.
 
You need 50 to 80 HP plus good traction. I had a Landoll 4" twisted shank with two new rr ties on the back. Thought that I was doing a lot. Measued that I was going 4" deep. The DMI will go in the ground. I was trying to set the depth on mine with a 342 hp 310 steiger. Kept changing stops and finally took them all out. I went 2 inches and killed it dead.

Guys that claim that they are going in the ground 12" deep at 6+ mph must have sand. That woun't happen in my black dirt. Guys around had M & W and ran the disc deep to make it black and would weld on them every other week.
 
Mental note to self. Need more HP than TO30 LOL

I bought a 7 s-tine ripper on a 84' solid diamond 2" bar. It has 4 short and three long tines. I lasted about 6" before the old Fergie said no way.

I paid 125 and I just wanted the tool bar anyway so I'm not disappointed. I did learn I can leave one on, on the left tire alignment and get a good water furrow.

Do the best with what ya got. I do have a very good tool bar.
 
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