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JD 4020 with smoking problem

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RayT

05-19-2003 09:07:50




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I just purchased a 4020 and it smokes blue smoke pretty bad when first started and then slows down some after warmup...10/15 minutes. The person I bought it from said it had a complete overhaul in the early 90s and has had only 600 hours on it since. Is it possible the rings are stuck and need loosened? If so, is there an oil additive that anyone would recommend for the job?


Thanks,
Ray

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John Jenkins

05-19-2003 10:46:39




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 Re: JD 4020 with smoking problem in reply to RayT, 05-19-2003 09:07:50  
Did they rebuild the head too? You probably have worn valve guides. Just my $.02 but I�ve seen it more than once. Good luck.



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jimks

05-19-2003 10:36:39




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 Re: JD 4020 with smoking problem in reply to RayT, 05-19-2003 09:07:50  
Does it consume oil? If not, I'd guess that one or more injectors are getting tired. I've not worked on a lot of John Deeres, but on a Cummins, if the smoke has a distinct pulse to it, that indicates a bad injector. You can cut out injectors (in your case, by loosenind injector lines one at a time) and see which one is the problem... or they all could be getting worn.



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RayT

05-19-2003 18:42:23




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 Re: Re: JD 4020 with smoking problem in reply to jimks, 05-19-2003 10:36:39  
I haven't had it long enough to know. I just got it Saturday. Is there any oil additive that will loosen stuck rings? Someone else said that could be a problem because of the limited use the tractor has had over the last 10 years...only 600 hours

Ray



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