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Farmall & IHC Tractors Discussion Forum
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756 diesel

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BigRed

02-04-2004 15:55:53




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I have a 756 with the 310 German power and an M&W turbo. I would like to pull in the hot farm with it, and still use it on the farm. Are there any modifications I can make, like a different pump, injectors, that would allow me to turn it up for pulling, and down for farming.




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farmerbill

02-05-2004 15:37:19




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 Re: 756 diesel in reply to BigRed, 02-04-2004 15:55:53  
Now this goes back a ways but we had a 706 with the 310 and it spent alot of hours on a 8 row planter and never gave any trouble but we never turned it up or even thought about it. We had a 826 also and it had the 358 engine. Like the 706 it never really did any work but put a m&w turbo on it and really liked the way it ran. After all of the tinkering I was comfortable with we still had only a little over 100 horse and the tractor had not many hours on it. I took it to town to the dealer as I was dissapointed with my investment of the turbo. When the mechanic got done it ran a solid 130. The pump was open as far as it would go and he ran the injectors and changed air and fuel filters. It never did smoke, that littl engine could have stood alot more fuel. Ran it like that till I traded it for a 1086. It was a nice little tractor but to really put some power in it I bet you need a pump and injectors.

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Jimmy King

02-05-2004 09:06:30




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 Re: 756 diesel in reply to BigRed, 02-04-2004 15:55:53  
Big Red my 756 will put out some smoke on a pull it always has. After we got it 1981?? my friend has a dyno. it was turning about 68 hp. a screw came out out the pump internally, and the diesel shop exchanged pumps with us for $85 [wow] after that once I had it on the dyno. again and it put out 88hp at 540 and 100 at 350 at 101 fell on it's face quickly. It also made a difference in fuel consumsion but still not bad.

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Hugh MacKay

02-04-2004 23:43:37




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 Re: 756 diesel in reply to BigRed, 02-04-2004 15:55:53  
Red: I'm sure you can achive the hp increase with pump and injectors allready there. I know you could with any of the American diesels. You may getfaster results asking on pulling page.



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BigRed

02-05-2004 06:56:18




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 Re: Re: 756 diesel in reply to Hugh MacKay, 02-04-2004 23:43:37  
Thannks Hugh. I did post it on the pulling page and nobody seems to want to help. Last summer I tried turning up the pump, but it didn't seem to help much. So here is another question, how do you turn up the pump on these? One guy told me to turn the screw that is the front stop for the fuel cutoff, is this correct? And if it is correct, about how many turns? Last summer the engine pulled down without giving the least trace of black smoke.

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Hugh MacKay

02-05-2004 09:12:44




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 Re: Re: Re: 756 diesel in reply to BigRed, 02-05-2004 06:56:18  
Red: The only time I ever did this was on my 560 Farmall with the 282 diesel. An IH technicion did this for me so I am not familiar with the actual process. I do know it was not all external settings, he didn't remove pump from tractor but he did have a cover off.

My 560 did not have a turbo and he was able to obtain 100 hp pto but it was at about 600 rpm on pto so he did increase engine rpm some. As I recall 560 obtained 540 pto at 1800 rpm and was governed at 1950 rpm when new. I think he had the governors set at 2150 rpm when he was finished. We did not leave the 560 at 100 hp, in fact we cut it back to about 90 hp, and still at about 600 rpm on pto, about 1980 engine rpm.

I farmed with the tractor set that way. Until I got 1066 in 1975 most of the 560 pto work was on forage harvester, and I liked the 600 rpm pto for that. After buying 1066 I used 560 on silo blower, and again 600 rpm pto worked well. If baling I did keep it at 540 rpm on pto. I put 11,000 hours on 560 in 17 years set that way. The technicion that did those adjustments would only do them with dyno present. If I were you and did this I wouldn't be shifting it back and forth for pulling, just leave it set and use good judgement. You should have a pryrometer with that turbo though. My 560 did blow up at 11,000 hours, I have no regrets, it was economical hp. I guess I should have traded it for a new 806 way back when, but money wasn't all that plentiful, so you put up with what you have, until tmes get better. I will add this 560 was awfully hard on pto clutches set at 90 hp. But then IH really never mastered that live pto until the 06 and 56 series tractors.

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Matt Kirsch

02-05-2004 10:34:39




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 Re: Re: Re: Re: 756 diesel in reply to Hugh MacKay, 02-05-2004 09:12:44  
How'd the rear end hold up to that much power? Our old 560 would shear some bolts in the rear end from time to time, and I understand that it was a general problem in the series.



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Hugh MacKay

02-05-2004 10:50:15




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 Re: Re: Re: Re: Re: 756 diesel in reply to Matt Kirsch, 02-05-2004 10:34:39  
Matt: My 560 was a 1963 model, suposedly they had corrected that problem by then. I never had any rear end or transmission problems. After the engine blew up in 78 and it had no 3 point, I didn't bother to fix it. I sold it to a couple of guys for a puller. They put a big gas engine in the 560, turning about 4,000 rpm and smoked every thing in several counties for about 5 years. They had 20.8x38 tires, pulled in classes up over 12,000 lbs. Thet may have been much higher than that I don't follow tractor pulling very close. They said you could drink the fuel.
All I can say is the rear end and transmission must have been strong.

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