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Implement Alley Discussion Forum

How much power to pull 9' disc??

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jr01

06-12-2006 06:09:28




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Is it reasonable to expect a 1960 Massey-Ferguson MF50 to pull a 9' disc (28 discs total, 7 on each gang)? I believe the HP rating for this tractor is approx 30 hp.




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Leroy

06-14-2006 05:10:29




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
A 28 blade (Not plate) finnishing disc should measure about 8'8" at full setting across back gangs at end of axle, may be adjustable gang angle on some discs and not on other makes, and it would be a finnishing disc as the plowing discs were not made in that small of a size and the ones that are saying you do not have enough power are thinking of those and none of the finnishing discs were ever designed for the speeds that some posters are saying you should run at @ 5-5 1/2MPH and none of the tractors of that era were designed to work at those fast field speeds, your tractor is too light of weight for you to control (Be able to stay on) if you would find a small enough disc to pull at that 5+MPH speed, for speeds like that you need a tractor of the size of the Massey-Ferguson 1100 or John Deere 4020 in the approximatly 100HP range with the weight to keep you from bouncing off the seat and under a rear wheel of the tractor and also at those speeds if something would go wrong (Break) instead of being a slight repair it would be a major repair or replacement of the disc or tractor. I am pulling a John Deere KBA wheel disc of that size and at medium gang angle in forth with a John Deere a with a spike tooth in back of it and that speed acording to the book is 4 1/2 MPH but I am not running at full throttle

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jr01

06-13-2006 13:42:11




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
Maybe this will help. I just realized that the back set of discs are set wider than the front set, presumably to catch the ridge produced by the front discs turning outwards. The width of the front is probably 7 to 7.5 feet wide. It has 28 discs, I guess that's the main thing regardless of width. I never noticed that the back set of discs were wider on other discs but I guess I never looked that close - is that common? It seems like a great feature.

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RodInNS

06-13-2006 14:19:43




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-13-2006 13:42:11  
A 28 plate disc is about 9'. The width is generally taken on the rear gangs. All tandem discs are wider on the rear, for that very reason.... to drag the ground back in that the front has thrown out. You can also adjust the angle of the gangs. The more angle, the more agressive the cut. Straighten the gangs out for shallow work or finishing. Hope you get along well with it.

Rod



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John17

06-12-2006 18:23:43




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
I have used my MF50 to pull a 10 foot JD drag disc before. The way it worked for me was to use a drawbar on the lower two arms of the three point hitch. That way if you got into trouble, you could use the three point to pull the front gangs out of the ground a little. I was able to disc in first gear, high range. I think as long as you do not try to get real aggressive with it, you will be fine. By the way, take good care of that old Maasey, they don't build 'em like that anymore. HTH, JohnG

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evielboweviel

06-12-2006 15:50:35




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
you got it if you can pull it 5 mph then it is the right size



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Coloken

06-12-2006 10:52:23




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
jr, I've been lisening for years here on how much HP it takes to pull a disk. I've kept my mouth shut because of diferent conditions and the way a disk is used. Here we don't use near what most on the discusson recomend, we don't "plow" with one. We only disk the top. You just said that you tried the disk-- there for- you are the expert. It it does what you want, keep it. Maybe don't go quite so deep?

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jr01

06-12-2006 09:57:37




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
That's a bummer - I just bought a used one. I've been looking for a used disc for years and finally found one. I would have preferred a 6' but this was the only one I've come across. I actually did some discing this weekend and it seemed to work. I was using Low 2 and 3. The soil is pretty heavy. Are you supposed to go fast when discing or doesn't it matter? (Can you tell I'm still pretty new to all this??!) Thanks!

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Leroy

06-13-2006 04:32:09




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 09:57:37  
Actually the speed should be about 2 1/2 to 4 1/2 MPH depending on what you are cutting, first time over plowed ground the 2 1/2 speed then move up to 3 gear at about 3 1/2 MPH or final disking to 4th at the 3 1/2 MPH, these speeds are from the John Deere A tractor book and your gears should pretty close match these speeds and also HP should be pretty close with the Massey Ferguson at 35 HP compaired to the Deere with 38Hp or a Farmall M with 37HP and that size is what was sold for those tractors. Your biggest problem will be the tires, you don't say if you have the 28" or the 38" tire so I assume you have the 28" and with that size you will need duals with fluid weight for traction. Generly disc 1 gear above plow speed

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RodInNS

06-13-2006 06:20:14




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 Re: How much power to pull 9' disc?? in reply to Leroy, 06-13-2006 04:32:09  
I'm sure those speeds you listed are correct as printed 60 years ago, and that was established practice them. That said, a disc will work most agressively at 5-5.5mph. The only issue with 5.5 mph is the ridge the disc throws up. In my mind, the quicker I'm done, and the less trips/fuel I spend, the further ahead I am. Get on wiht something else. I drag an I-beam about 2 feet wider than the disc, hitched to the disc, which levels the field. 2 fast agressive cuts, and I'm out. If I'm short on power, the disc wheels go down, the disc comes up, and the speed stays up. The speed does more work than the depth. My old man, who believes in the 3 mph stuff, will spend 40% more time per cut, and make 2 extra cuts to get the same seedbed. But it always worked before.....
To each their own on that I guess.
Agree with you that the Ferguson will be challenged with the little tires. That said, if it gets around, and pulls it at a comfortable speed, that's all it's got to do. I would think a 50 should handle that disc OK on light ground. I've handled 10' on a 45 hp without any trouble. If it bogs down, just lift the disc a bit.

Rod

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Don-Wi

06-12-2006 10:43:04




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 09:57:37  
2nd and 3rd is pretty slow, they work better in 1st high. You can ussually narrow them up some so you may be able to go that route too. For a tractor that size, I"d want a 3 pt. mount about 6" wide.
Donovan from Wisconsin



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Luke S

06-12-2006 08:57:55




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
I was pulling a 10' disc the other day with my 42 pto hp tractor, it would do it, but it was making it bark pretty hard, my 130hp tractor would have been overkill though.



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msb

06-12-2006 08:46:45




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
Only if you don't put the disk in the ground very deep.



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Glenn F.

06-12-2006 07:13:15




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
Absolutely NOT.



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brian 1

06-12-2006 06:18:34




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 Re: How much power to pull 9' disc?? in reply to jr01, 06-12-2006 06:09:28  
In all but the lightest soils I'd say no.



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