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Farmall & IHC Tractors Discussion Forum
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hard starting 756 diesel

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corey Lichty

12-20-2003 22:14:54




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Can anyone tell me if i should have to use ether (starting fluid)every time I have to start my 756 with the german diesel. Because every time it stalls out or i shut it off for just a second I have to give it a shot of ether to get it going again.




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cb ont ca

12-23-2003 13:44:49




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 Re: hard starting 756 diesel in reply to corey Lichty, 12-20-2003 22:14:54  
These 6 cylinder germen engines are hard to Fire up if you don't use the primer on the fuel pump when turnimg it over cold.

Shut the trouttle right down to low idle and pull the shutoff cable 3/4 of the way out till it just touches the little spring loaded plunger on side of the injection pump.Then start cranking it over, As soon as she fires let go of the shut off cable and give her a little trouttle.

This works evertime on our 756 or 826 that have german diesels in them. If you look at a model 574 thru 684 with 4 cylinder germans diesels they use the same setup only its clearly marked out on there diesel shutoff control. I know since we also have a IH 684.

Good luck and have a Great Christmas and New Years, Chris

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Michael Soldan

12-21-2003 11:05:05




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 Re: hard starting 756 diesel in reply to corey Lichty, 12-20-2003 22:14:54  
Corey, you didn't say how the tractor runs, is it using a lot of oil?, does it smoke, sputter, cough?..I am assuming that it is just a hard start..Now I know how Hugh feels about additives but here's my story..this little diesel I bought hadn't run in 8 years and after I got it home I could only get it started with ether...a tractor friend of mine gave me a talking to about using ether so I put a cleaner/conditioner in the fuel , we suspected dirty injectors and slobbering injectors and after a few tanks of this treated fuel the tractor began to start without ether and now I can start it even in the cold weather using only the glow plugs. Hugh has made the point here that clean fuel should not require any cleaner and that many fuels contain conditioners for various weather conditions, however the tractor I bought had not been cared for properly and dirty fuel,sediment bowl and filters were evident, having used this fuel conditioner/cleaner I am convinced that it improved the tractor's starting and performance...I could have removed the injectors and had them cleaned or replaced but a few cans of diesel conditioner worked for me. There may be other cicumstances with your tractor but I am only sharing what did the trick for me and it worked. This tractor loads all my manure and I clean out every two weeks, it starts without being plugged in and without ether. Not knowing more about your tractor makes it difficult to give you something concrete but that's my story and I'm sticking to it!..... ..Mike in Exeter Ontario

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Hugh MacKay

12-21-2003 14:08:31




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 Re: Re: hard starting 756 diesel in reply to Michael Soldan, 12-21-2003 11:05:05  
Michael: I really don't find a problem in using fuel conditioners in the manner you did on a tractor that hadn't run in 8 years. In this case with the 756 I based my judgement on fact he used term stalling as though it happens quite frequemtly. Those 6 cylinder IH diesels whether they be US or German don't stall very easily, even with as many as 10,000 hours on them. I have seen them worn both in cylinders and injection system to point you had to tow start or use ether every start, yet once they were warmed up they are very hard to stall. Based on this, my opinion is every component; cylinders, head and injection system require rebuilding. I would be willing to bet this tractor if dynoed is running about 45 to 50 hp.

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Michael soldan

12-21-2003 17:11:44




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 Re: Re: Re: hard starting 756 diesel in reply to Hugh MacKay, 12-21-2003 14:08:31  
hey Hugh how's it going? I don't disagree with you and others about the condition of Corey's tractor, he didn't give us a lot of information, the lot of you may be quite correct that it is rebuild time, I was however thinking that the poor starting could also have a basis in bad injectors, clogged or slobbering injectors or as was suggested a bad pump. I also screwed up about the Seaforth Toy Show and it was over by the time I found out the date.I did find some models at TSC that suited my collection and a friend donated 4 nice models to my meagre collection. Anyway, you and the family have a good holiday....Mike in Exeter ontario

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Brad in VA

12-21-2003 08:03:11




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 Re: hard starting 756 diesel in reply to corey Lichty, 12-20-2003 22:14:54  
Sounds like you have a good winter project.



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old

12-21-2003 07:56:59




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 Re: hard starting 756 diesel in reply to corey Lichty, 12-20-2003 22:14:54  
Some thing the out guys didn't say you could have a weak injection pump also or bad injectors



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Hugh MacKay

12-21-2003 02:44:17




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 Re: hard starting 756 diesel in reply to corey Lichty, 12-20-2003 22:14:54  
Corey: Your 756 engine must be in tough shape, as you speak about stalling as though it is a common occurance. My opinion a 756 would be a hard engine to stall. In fact I don't know of a 6 cylinder IH diesel that stalls very easily, even after many hours of use. It's rebuild time.



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corey lichty

12-21-2003 18:00:48




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 Re: Re: hard starting 756 diesel in reply to Hugh MacKay, 12-21-2003 02:44:17  
My 756 was smoking pretty bad(blue smoke). when i bought it the the main hydralic pump was shot and I had to put one on. then I put some fuel treatment in it and the smoke pretty muck cleared up. It runs good after it is started. the only time it stalled out was when the pump was going ot and it was smoking. the only thing i do with it is spred manure but the guy that had it before said it pulled a 5 16" plow. It had been sitting for a couple years though.

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Hugh MacKay

12-21-2003 18:45:39




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 Re: Re: Re: hard starting 756 diesel in reply to corey lichty, 12-21-2003 18:00:48  
Corey: Do you know how much horsepower your tractor is putting out right now? Does it handle it's loads well on hills? Is it hard to keep it running at low rpm? This blue smoke you speak of does it stop when tractor is warmed up to operating temperature?



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corey lichty

12-22-2003 15:13:38




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 Re: Re: Re: Re: hard starting 756 diesel in reply to Hugh MacKay, 12-21-2003 18:45:39  
I'm not sure of the H.P. but it stays runing at low rpm and it handles it's loads on hills and it does stop smoking after it gets warmed up.



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Hugh MacKay

12-22-2003 17:44:07




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 Re: Re: Re: Re: Re: hard starting 756 diesel in reply to corey lichty, 12-22-2003 15:13:38  
Corey: I think may be I was just a bit hasty on the complete rebuild. I not saying it all doesn't need doing. Just do the Injection system first, and see what happens. After that, if you could find a place to get it on a dyno, or some machine you know takes the full 75 hp. I would do this quickly as possible as that ether every start is very hard on the engine.



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corey lichty

12-22-2003 15:08:35




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 Re: Re: Re: Re: hard starting 756 diesel in reply to Hugh MacKay, 12-21-2003 18:45:39  
I'm not sure of the H.P. but it stays runing at low rpm and it handles it's loads on hills and it does stop smoking after it gets warmed up.



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Redfan

12-21-2003 00:12:13




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 Re: hard starting 756 diesel in reply to corey Lichty, 12-20-2003 22:14:54  
Corey it seems to me your 756 is very sick. Normally the 310 is a good starter unless your rings are totally shot or your valve seats need attention. Check for a blocked fuel filter first, but failing that you might be due for a rebuild. Regards, Redfan.



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