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  1. #11
    New Member
    Join Date
    Feb 2013
    Posts
    14
    Location
    Mulberry Grove Ill
    Tractor
    John Deere 110 tlb, + 5 others

    Default Re: 3020 jd diesel in oil

    If this is a old 3020 diesel you have a fuel pump on the right side, front of engine it has a weep hole in it you shood see some dirty oil by the pump. sometimes the weep hole gets plugged with dirt and if the pump goes bad it will put fuel in crankcase.
    The fix is a new fuel pump.
    Could be fuel injection pump, But I would replace the fuel pump first.
    Always check oil before start up
    Good luck treetrimmer01

  2. #12
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Posts
    3,715
    Location
    Coyote Flats,Tx
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: 3020 jd diesel in oil

    I sure wish JD engineers hadn't numbered some of the CUT's using the same numbers as older JD tractors. It makes it very confusing.

  3. #13
    Silver Member duke7595's Avatar
    Join Date
    Jan 2012
    Posts
    237
    Location
    S/W MO.
    Tractor
    820 ,1520,1020 (D) 1020 (G) 1050,4020

    Default Re: 3020 jd diesel in oil

    Quote Originally Posted by Tx Jim View Post
    Turn pump upside down and after replacing u-cup seals(parts key #18) on drive shaft,lubricate the seals then carefully slide the shaft into pump(being careful to line up dots) so as to not wrinkle the first cup back. The JD tractors that are very difficult to install inj pump without a tool are the models that the shaft stays in the engine
    Thank you for this information, I'm sure many of the members will appreciate it.

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