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Farmall & IHC Tractors Discussion Forum
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560 May Have Died

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IaGary

11-03-2005 03:24:55




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Yesterday while grinding feed for cattle the 560 gas started poping and backfiring through the air cleaner. I tried setting the timing while poping and I tried resetting the carb. ||Didn't help. Would only do it under heavy load. When I| idle down or no load it would run just fine. I put on MTA to finish. Could it be ignition didn't check any of that yet? What do you pros think any other ideas? THANKS

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Mcred

11-03-2005 08:38:15




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 Re: 560 May Have Died in reply to IaGary, 11-03-2005 03:24:55  
Gary do you have champion D21 plugs in it if so switch to a D18 schould help we had the same problem with our 560 on the feed mixer and found out it was only the hotter plugs doing it



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T_Bone

11-03-2005 07:14:40




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 Re: 560 May Have Died in reply to IaGary, 11-03-2005 03:24:55  
Hi Gary,

Next time it goes to missing add a small of propane (vapor only) in the intake:

If it quits missing then it's a fuel problem

If it still misses then it's electrical or mechanical problem.

T_Bone



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the tractor vet

11-03-2005 05:33:06




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 Re: 560 May Have Died in reply to IaGary, 11-03-2005 03:24:55  
Well sounds like you are running the cheep gas in her and are on the way to seezing a piston or taken and exhaust valve out of her . If that 560 gasser was at one time updated to the 263 706 kit and i suppose it was then ya need to run the high test as we know it today . Check your total advance timming at full throttel +or - only a couple degrees . Our high test of today was the rating of reg back then i have been over this time and time again and for some reason grinding feed is the fastest way of eating a 6 cylinder up been there 5 times already the M TA will get away with it . Check you machanical advance and make sure that it is working correctly and up your octain we are now in winter blend on the fuel thing . And also if the gas has any alkihol or MTB or MTD in it that even leans it out more thus lean is mean . I would supect that if you pulled the head you would find scored linners and wright above the top ring the pistop has swelled and is scored. A good friend has a 460 gasser that will not even pull a loader manure spreader up a hill without doing that on reg. 87 gas but put 93 it and it runs strong.

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xxdonxx

11-03-2005 03:43:15




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 Re: 560 May Have Died in reply to IaGary, 11-03-2005 03:24:55  
might be camshaft. will run ok no load but pop back thru carb and lack power.



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Allan in NE

11-03-2005 03:29:45




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 Re: 560 May Have Died in reply to IaGary, 11-03-2005 03:24:55  
Hi Gary,

You nailed it (if you're sure your fuel is okay).

Those wear blocks on the points will wear down closin' the points until the tractor starts poppin' and missin'.

Readjust 'em and I'll bet you're back in business.

Allan



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IaGary

11-03-2005 04:10:20




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 Re: 560 May Have Died in reply to Allan in NE, 11-03-2005 03:29:45  
I hope it's just that. It ran fine on pull tpye picker last week. That pulled it hard also. Won"t be grinding for afew days but I'll change points before i do to see what that does. Just got the calves weaned so don't get much grain.



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Roger in Iowa

11-03-2005 06:13:56




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 Re: 560 May Have Died in reply to IaGary, 11-03-2005 04:10:20  
My experience has been water or condensate in the distributor cap will also cause backfire or popping. Take off the cap and use the discharge from a hair dryer or vacuum cleaner (if warm) to dry it out. Maybe even a heat lamp. Putting it under load causes the ignition to see higher loads.

Roger in Iowa



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Janicholson

11-03-2005 11:03:08




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 Re: 560 May Have Died in reply to Roger in Iowa, 11-03-2005 06:13:56  
I respectfully disagree with the idea that high loads stress ignition more. On an analyser, the voltage goes down from 12-14kv to 7-8kv on the spark line when the throttle is opened.

The more compressed fuel and air in the combustion chamber the easier it is for the spark to ionize the mixture to jump to the other electrode. Idle conditions, or deceleration conditions withj high vacuume take the most voltage by far. The vacuume is a better insulator than compressed air/fuel.

Fact not theory. JimN

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Allan in NE

11-03-2005 11:17:10




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 Re: 560 May Have Died in reply to Janicholson, 11-03-2005 11:03:08  
Hi Jim,

You speaketh the truth; the highest demand is at idle, no load or strong de-acceleration.

Funny part is, it is easiest for us humans to detect or "feel" the miss under a heavy pull. Go figure on that one. :>)

Allan



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