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  1. #1
    New Member
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    Aug 2011
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    deere 2020

    Default deere 2020 fuel in oil

    I have 4 cyl deere 2020 recently purchased. when i got it, after sitting for about 6 years, I changed the oil and when draining about 4 gallons came out of oil drain, with a strong smell of diesel fuel. changed the oil and put new oil in (7 Qts) after about maybe 10 hours of operation it is about 1/2-3/4 quart high and again smells of diesel fuel. I cannot find anything on adjusting fuel pump for a rich running machine, or is my problem more serious where i need to redo some cylinders??

  2. #2
    Gold Member
    Join Date
    Mar 2005
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    363
    Location
    The Real Central PA
    Tractor
    BX25D, JD 820

    Default Re: deere 2020 fuel in oil

    I had a similar problem with my JD 820 several years ago. If I recall correctly, there was a diaphragm in the fuel pump that ruptured, allowing fuel to enter the engine block. I replaced the fuel pump and the problem was solved.
    If ignorance is bliss, then why aren't more people happy?

  3. #3
    Veteran Member D7E's Avatar
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    May 2006
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    2,142
    Location
    manitoba
    Tractor
    Many

    Default Re: deere 2020 fuel in oil

    Lift pump !

  4. #4
    Veteran Member whodat526's Avatar
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    Apr 2010
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    1,529
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    deridder louisiana
    Tractor
    fords

    Default Re: deere 2020 fuel in oil

    could be the front seal in the injection pump

  5. #5
    New Member
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    Aug 2011
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    deere 2020

    Default Re: deere 2020 fuel in oil

    thanks for all the advice, i will investigate both potential solutions, thanks again Roy

  6. #6
    Veteran Member banjodunn's Avatar
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    Jun 2008
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    1,229
    Location
    Oz

    Default Re: deere 2020 fuel in oil

    G'day most common cause of fuel in oil have both been mentioned

    1. Lift pump ( or prime pump as you lot call it)

    2. Front seal on the injector pump

    Hope it is No 1 for you as this is alot cheaper and easier than 2. Good luck and let us know how you get on


    Jon

  7. #7
    New Member
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    Aug 2011
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    deere 2020

    Default Re: deere 2020 fuel in oil

    Thanks Jon, will do

  8. #8
    Member
    Join Date
    Nov 2004
    Posts
    43
    Location
    Indiana
    Tractor
    1966 Cub Cadet 124

    Default Re: deere 2020 fuel in oil

    Quote Originally Posted by banjodunn View Post
    G'day most common cause of fuel in oil have both been mentioned

    1. Lift pump ( or prime pump as you lot call it)

    2. Front seal on the injector pump

    Hope it is No 1 for you as this is alot cheaper and easier than 2. Good luck and let us know how you get on


    Jon
    I had a Cummins engine that did the same thing, only it was a bad (internal)leaking injector.

  9. #9
    New Member
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    Aug 2011
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    deere 2020

    Default Re: deere 2020 fuel in oil

    Replaced gasket and fuel lift but did not fix the problem, another forum a guy talked about replacing a diaphragm in the fuel pump?? This sound logical to anyone?

  10. #10
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    4,784
    Location
    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: deere 2020 fuel in oil

    Depending on type inj pump umbrella seals(parts key #21) on inj pump drive shaft need replacing. While inj pump is off check bronze bush(parts key #20) in inj pump for wear.
    Attached Thumbnails Attached Thumbnails -t17093_________un01jan94-gif  

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