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Farmall & IHC Tractors Discussion Forum
:

IH 656 (gas) shuts down after getting warm

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Pig

06-10-2020 03:59:06




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As title suggests; we have a 656 (gas engine) that we "inherited" with the farm we purchased.

It's been so reliable in the past, that all I've done so far was oil/filter changes.

I had planned to get into some more maintenance, when now suddenly it shuts down after a few minutes of running well.
It loses power and basically just stalls. It's easy to restart from that point, but will shut down pretty much immediately, unless it is given some time to cool down.

Temp gauge doesn't show overheating, and I don't believe it is.

Coolant level is good.

Any help appreciated. We have a more modern tractor, but I prefer to use the 656 for certain things....

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MJMJ

06-15-2020 11:03:23




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
Glad you got it figured out. It's surprising how much stuff can get in under the cap.



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Pig

06-12-2020 05:13:22




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
Quoting Removed, click Modern View to see

Update: It WAS a fuel restriction!
Managed to get in the barn yesterday and look at the fuel supply.
The glass bowl did have some debris on the bottom, and once I removed the bowl, I noticed not much gas flow.

Drained the tank, removed the complete 'strainer', and sure enough: there was considerable debris in front of the petcock (see picture).

So, MANY, MANY thanks to you (and everyone who replied)!

Saved me a bunch of headaches by not delving into wrong areas first (i.e. condenser).



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MJMJ

06-10-2020 17:05:41




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
To me, that sure sounds like a fuel restriction. The longer it sits, the more fuel that makes its way through. Had that happen once on my Ford 3000. Petcock was full of wasps.



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Pig

06-10-2020 11:27:23




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
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Well, I should probably elaborate: it starts up okay, but will die down immediately if it's still warm/hot. The longer I wait, the longer it will run after start-up.

So, I run it for ~20 minutes, it stalls.

Start it up immediately, it stalls in 5 seconds.
Wait 20 minutes, it runs for 5 minutes.

(But thanks, I will definitely check fuel-supply issues....)

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MJMJ

06-10-2020 10:38:08




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
If it starts up immediately after shutting down, I would look into a fuel problem first. Sounds like it's starving itself for fuel.



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Pig

06-10-2020 10:05:04




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
Wow, thanks for all the good replies!

RE: gas

I now exclusivity use non-ethanol, 90 octane [(R+M)/2] in everything but our cars, since they sell this now at the pump.

(90 is the highest octane they sell around here).



I'll check the coil (for heat) and the fuel line (for clogs) when I get a chance.

The sediment bowl does have some debris in it, so there's that.

Not sure I can check the spark easily "as soon as it shuts down", as it always starts right up again...

(Might also take this opportunity to change to electronic ignition, IF that is where the issue is...)

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Farmall Smoke

06-10-2020 09:25:18




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
I also have a 656 gaser doing the same! did a total carb rebuild, clean gas tank and sediment bowl and added elec. pump! Got AV gas so the Octane should be plenty high.



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The tractor vet

06-10-2020 09:41:01




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 Re: IH 656 (gas) shuts down after getting warm in reply to Farmall Smoke, 06-10-2020 09:25:18  
Av gas is not a wise choice . and not cost affective . 93-95 octane will work well if one can find it . Up till like three four years ago we got along fine on 93 , now the best straight gas is 90 and that is NOT good enough .



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The tractor vet

06-10-2020 08:05:02




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
Lets start off with when this happens go touch the coil , if you burn your hand then change the coil . Next check your gas flow to the carb , look in the sediment bowl for JUNK . Install a new gskt and do not over tighten as you can warp it vary easy . Next check your ing timing at full throttle for full advance , Do not try moving your ing timing above factory spec.'s . Next change your gas and dig into your pocket and feed it the good stuff not the 87 . They were designed for higher octane regardless what the Experts here tell you . In my neck of the woods we ran a bunch of gasser and since the mid 80's we have fought the problems with gas tractors . NONE of us are running gassers anymore .

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wore out

06-10-2020 06:14:52




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
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Be prepared to check for spark as soon as it stalls.

That will narrow the issue down to spark or lack of fuel.

IF no spark, coil, condenser, ignition resistor or ignition switch would be the prime suspects.



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MJMJ

06-10-2020 05:24:24




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
Also check fuel supply. For example, a partially clogged petcock can do the same.



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Jo Bird

06-10-2020 05:19:36




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
Quoting Removed, click Modern View to seeIMHO, Feel the coil when it shuts down, if it is super hot, your probably right.



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Pig

06-10-2020 04:38:17




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 Re: IH 656 (gas) shuts down after getting warm in reply to Pig, 06-10-2020 03:59:06  
I am thinking a bad coil, possibly?



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