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Farmall & IHC Tractors Discussion Forum
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hard starting 806

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Aaron

02-24-2004 17:55:13




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I have a IH 806 and it has about 6500 hours on it and its hard starting.Now ive heard nothing but good things about the 806 and from its performace for me its all true.But it is hard starting i mean a can of either is its jolt to life unless its at least 80 degrees out but i put a new injector pump on it cause the old one was leaking out the cross over but it still staarts the same im sure it needs the valves run on it and a good tune up done but i talked to some one and they said theve had the same problem and they tried everything and finaly they talked to a old IH mechanic and he said they had a problen with the vaalves over time wearing into the head and the guy said they would just slowly lose compression.And the guy i taalked to said that after having the head over hauled and everything set back to spec that the tractor would start everytime temp didnt seem to mater.

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Aces

02-25-2004 05:01:34




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 Re: hard starting 806 in reply to Aaron, 02-24-2004 17:55:13  
Aaron.

I don't think it is how much the valves move into the head as that they are not seating good enough and the rings most likly have some plow by.



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Doc Holiday

02-24-2004 20:28:26




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 Re: hard starting 806 in reply to Aaron, 02-24-2004 17:55:13  
Aaron>

Maybe the best thing to do is run a compression test on your tractor.
Be sure the starter and batteries are in good condition first to make sure you accurate readings.

A diesel engine compresses into a very small area and any increase in that area (worn valves and seats that move the valve back into the head) will cause a loss of compression and thus make starting harder.

Make sense?

You tractor isn't real high hour but until you do a compression test you are shooting in the dark.

Doc

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