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Callin Allan

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TGIN

05-17-2007 02:27:09

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I looked at my 310 and the fuel shutoff cable is hooked to that leaver . When pulled part way out it is start position then pull all the way to shut down . Why could`nt ya put a cable on there to get ya a start posision . You may have to make it spring loaded so it wont interfer with your regular shutoff .

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Ted in NE

05-17-2007 07:33:53

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Re: Callin Allan in reply to TGIN, 05-17-2007 02:27:09

The 312 engines with the low comp ratio were made for the southern states. Not made for cold states. If you got one of them up in this country which is not uncommon, they run as you say. Nothing to be done other than put in a set of the high comp pistons. When overhauling one you had to be sure and get the high comp. set or they ran worse than they did when needing an overhaul. Learned that the hard way. Do not know why IH made 2 different sets but sure caused a lot of problems for the service end. The punp on the 312 is made to give you fueling for cold start at approx. 1\3 throttle. The 310 you leave the throttle at idle and pull the cable to bring the lever to the spring loaded plunger, thie is the overfueling position for cold start. On back to compress the plunger is shut off position.
Hope this helps, Ted

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Allan In NE

05-17-2007 07:58:19

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Re: Callin Allan in reply to Ted in NE, 05-17-2007 07:33:53

Brought the tractor in from IA from an iron trader who had bought it on an auction somewhere unknown. Was a whorehousemama that really had been mistreated.

You don't suppose I've got a "312" tractor that someone has dropped in a 310 somewhere along the line? At 60 or above, it doesn't blink, starts first crank, every time.

Allan

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chadd

05-17-2007 09:23:43

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Re: Callin Allan in reply to Allan In NE, 05-17-2007 07:58:19

I dunno, I have been staring at the parts diagram on the Case IH parts search for a while and yours looks a little different than the picture they show. They show an electric solenoid that yours doesn't seem to have, and yours has the little plunger piece that they don't show. It doesn't make yours "wrong" but it sure is confusing. . . The linkages seem about right.

third party image

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Allan In NE

05-17-2007 02:47:37

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Re: Callin Allan in reply to TGIN, 05-17-2007 02:27:09

Could go out there some cold morning, tie it part way back with some balin' wire and see how it starts.

If there is an improvement, I could just rig a cable up permanent.

Thanks for your help,

Allan

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K.B.-826

05-17-2007 16:59:59

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Re: Callin Allan in reply to Allan In NE, 05-17-2007 02:47:37

Allan, if you tie that lower arm back with some baling wire, it will not start. That pump does not have excess fuel, like the earlier Bosch rotary. You can verify this by slowly pulling back on that arm while the engine is running at an idle. Your engine with that pump will simply shut down, but if you try this on an engine with the early pump, it will rev up to 1900 RPM when you get to the excess fuel position, pull it back a little further and it will shut down. Read my responce to your original post on the subject, read Owen's post about the pistons, he gave some exellent info. The experience you are having is the nature of this beast. It's the reason we got rid of our 310-powered 686. A 706, 756, or 826 with the low-compression pistons and the old style pump will definetly start better than a 686 with low-compression pistons and the new style pump. The only explaination I can come up with is that the old style pump was discontinued and IH didn't figure out that those 310's wouldn't start without excess fuel or high compression pistons until after the 310 powered 686 went into production. The only solution to your problem is going to be a set of high compression pistons, and to make sure the valves and seats have not been ground too much.

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Allan In NE

05-17-2007 04:56:06

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Re: Callin Allan in reply to Allan In NE, 05-17-2007 02:47:37

You know, come to think of it,

That thing does act just like a 282D (15:1 compression) if ya get in a hurry and forget the glow plugs. Anything below 50 degrees or so and it just puffs white smoke.

I'm just wondering if there was some "swappin' around" done on this tractor at one time. I mean, just a "blink" of either and it pops right off. The engine is in excellent shape, doesn't use any oil at all and just simply pulls like a brute.

But, I've always said, that thing sure didn't act that way when it was sold new. IH would never have been able to move any of 'em if they all acted like mine does.

There's a hidden story here; I just don't know what it is for sure. :>)

Allan

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