574, the one hour tractor HELP

Bill Allis · Jul 8, 2009

Got my 574 (239 diesel) back from the shop today. New PTO clutch and Hyd system flushed, cleaned and re-filled. New fuel line from the filters to the pump.

Mowed for about an hour and it started to miss and smoke...again. It did not quit. It was not hot. Can it be anything but the pump?

Janicholson · Jul 8, 2009

Truthfully the best is to let the "shop" know, the issue may be under a repair warranty. They should see/hear the problem. JimN

Bill Allis · Jul 8, 2009

The stuff the shop fixed works fine now.

It runs fine after starting, there is smoke when it first starts, work the tractor for an hour and it starts to miss. We hoped it was the fabric fuel line between the filters and the pump....wasn't. I am afraid it is the injector pump, buy why does it take an hour?

Janicholson · Jul 8, 2009

If it is missing on one cylinder, and not just an erratic misfire, I would get it running long enough to have it misfire consistently then crack the fitting on the injectors (one at a time) and thus trace the misfire to a particular cylinder. THen I would swap injectors to see if the mis follows the location of the injector. If it does, replace/rebuild that injector. If it does not, I would suspect a compression check is first, then a pump rebuild. As things get heat soaked, they change. JimN

RJ-Wisc · Jul 8, 2009

My guess is a bad coil. Once it gets hot it starts to breakdown. Let us know what you find. Good luck.

JLE · Jul 8, 2009

If you move shut off control to the start position, will it go into a cold start? (ex fuel) If not believe it is starving for fuel. What usually shows signs of going bad, starts hard & surging govenor control.

Bob · Jul 8, 2009

DIESEL is the key word here!

Bill Allis · Jul 8, 2009

JLE, are you saying to move the lever from run to start when it is missing and smoking? What would add more fuel and if that stopped the missing what would I have to do to fix it? Or would that prove it was the pump?

JimN, that would be a good test and I will try it. Is this an unusual happening or is this an normal indication of a bad injector?

Thanks Guys.

JimB2 · Jul 8, 2009

Hi Bill, before looking at the injection pump using a clean bucket remove the fuel line from the fuel tank at the input to the first fuel filter and let it run into the bucket. The fuel should flow the full of the fuel line pipe for 5 minutes. If this dosen't happen try taking fuel tank cap off but most likely there is junk in the bottom of fuel tank clogging the outlet. My brother had a dead lady bug in the fuel tank of his 684 and it would act the same way. Runs short of fuel injection pump govenor gives the pump more fuel but there isn't any causing missing and then some fuel arrives and govenor is now full throttle so over fuels hence black smoke then govenor compensates for over throttle.

Hope this helps
JimB

Farmallkid1958 · Jul 9, 2009

We have had a constant battle with spiders building nest in our over head tank nozzle. You have to check it EVERY time you put fuel in our diesel tractors, If not you pump them into the tank and after a while it will plug up the fuel supply line, and cause them to starve for fuel. Might be a good place to check.

574, the one hour tractor HELP

Bill Allis

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Janicholson

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Bill Allis

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Janicholson

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RJ-Wisc

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JLE

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Bob

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Bill Allis

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JimB2

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Farmallkid1958

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