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Discussion Starter · #1 ·
My Great Bend tractor always starts easily (after a period of non use), but after about 20 minutes, it will shut down. Once that happens, i can't get the engine to run again for about 5-6 minutes. Once it is firing and running again, the engine speed doesn't respond in accordance with the throttle. By that i mean, i can put the throttle all the way up and the engine will not accelerate. i tend to have to keep it completely down or the engine will shut off. after about 5-6 minutes of that, it will begin to respond a bit more then eventually be fine.
after another 20 minutes, the process repeats.

Does anyone have any idea what is going on?
 

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Discussion Starter · #3 ·
Overheating
- unless the temp gauge doesn't work (it's not impossible), it sits around 170 or so. It shows in the green for that gauge.

weak coil
plugged fuel tank vent

with these 2, how do i go about checking them out? I'm a handy guy, but i don't know tractors.
 

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Overheating
- unless the temp gauge doesn't work (it's not impossible), it sits around 170 or so. It shows in the green for that gauge.

weak coil
plugged fuel tank vent

with these 2, how do i go about checking them out? I'm a handy guy, but i don't know tractors.
For the fuel tank vent, as it starts to stumble, loosen the fuel cap. If it clears up, you have found your problem.
The coil is trickier. One way to check if your coil is breaking down as it heats up is to cool it down.
Head out to Staples or Office Depot and pick up a can of air, you know, the stuff they sell for blowing the crumbs out of keyboards and the cobwebs out of your cooling fans.
When the engine starts to falter, or shortly before you expect it to, hold the can upside down and spray the coil for a few seconds. The propellant in the can will be super cold, so keep your fingers out of the way.
If the engine runs normally, you can be pretty sure you're on the right track.
 

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I'm not familiar with the Great Bend tractors and all I could find when I tried looking them up was Great Bend loaders. Is it diesel or gas? If its diesel the fuel filter or line could be getting clogged up.
Could you get us a little more information about your tractor?

Brad
 

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Discussion Starter · #6 ·
it uses diesel.
It's a front loader (with a backhoe PTO attachment). I don't have the info next to me so i can't give you the model number or anything. I basically liken it to a small farm tractor.
 

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Does your tractor have a small in-line fuel lift pump? I've had branches unplug mine and it would rough idle at best! Also check all fuel filters and air filters. You could even get a clean fuel can, disconnect the fuel line as close to the injector pump as possible, and allow it to drain into the can for a few gallons... you'll rule out debris in the tank and clogged filters this way. Just remember that you may have to re-prime the fuel system before it'll run again.
 

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It's a diesel so there shouldn't be a coil to worry about. Fuel and air would be what I look at. I once had a friend who put his gloves in front of the air filter and they would get sucked into the opening and close off the air. It would release after the engine died. Took us quite a while to find that one.
Check your filters and as said all fuel lines.
 

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Discussion Starter · #10 ·
First off, thanks for all the responses.

I know that when we first encountered this problem, we looked at the air intake and it seemed clear. i guess that since the cursory inspection did not reveal anything, that a more in depth inspection is necessary.

i know that i'm not leaking fuel, and the fuel filter appears clean. so am i looking for really tiny breaks in the fuel line to allow air in, or what?

oh and by the way, i have a GB220.
 

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I dont know if your tractors fuel tank has a siphon tube or a bottom drain .If it is top siphon type you may have just enough trash plugging the fuel line .On my Kubota it is top siphon and just a little trash in the tank and its a headache.It might run 20 minutes oe it may run a few minutes .Diesel Service fuel treatment or clean the tank is an only option.And have a new fuel filter ready.
 

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Discussion Starter · #13 ·
okay, so i finally looked at the right numbers. I have a nortrac nt-254. The online reviews aren't exactly glowing for this guy. It was a gift, so i can't complain. Do you all believe that it should be covered or in a garage? or since it is a working tractor that it is fine out in the elements.
 
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