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  1. #1
    New Member
    Join Date
    Sep 2012
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    6
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    O.K.C. OK.
    Tractor
    john derre 4520

    Default john Deere 450d crawler/dozer

    I had my John Deere motor rebuilt,injection pump ect. Now i have diesel in my oil.the mechanic stated it had to be the injector pump.is this true?

  2. #2
    Silver Member
    Join Date
    Oct 2008
    Posts
    120

    Default Re: john Deere 450d crawler/dozer

    I have a JD 450C. I would suspect the fuel pump before the injection pump. Fuel can leak from the pump seal into the crankcase.

  3. #3
    New Member
    Join Date
    Sep 2012
    Posts
    6
    Location
    O.K.C. OK.
    Tractor
    john derre 4520

    Default Re: john Deere 450d crawler/dozer

    Thankyou sir,i will look into that. it's hard to get a good mechanic in rural S.E. Oklahoma.So i'm left fixing my own equipment.

  4. #4
    New Member
    Join Date
    Sep 2012
    Posts
    6
    Location
    O.K.C. OK.
    Tractor
    john derre 4520

    Default Re: john Deere 450d crawler/dozer

    would this also cause the motor to shut its self down? it did'nt lock up,just idled down to a complete stop.Of course the oil cap wasn't on tight and blew motor oil over the top of the engine. I'm thinking an electrical connection got oil on it,and needs to be cleaned off?

  5. #5
    Veteran Member Gordon Gould's Avatar
    Join Date
    Apr 2007
    Posts
    2,124
    Location
    NorthEastern, VT
    Tractor
    Kubota L3010DT, Dresser TD7G Dozer

    Default Re: john Deere 450d crawler/dozer

    I am no deisel mechanic but I would say yes. If your lift pump quit or started sucking air. Make sure you get all that deisel out of the crankcase. I had an 87 ford F250 gas job that did that and filled the crankcase with gas but kept running. After I fixed the pump and changed the oil twice I couldn't get any oil pressure. Engine didn't like running in gas instead of oil.
    "If you're not making any mistakes then you're not doing anything"

    L3010DT, Farmi JL290 Winch, ATI Grapple, BearCat 5" Chipper, 6' Rear Blade,
    7' Sickle Bar, 5' Land Plane Grading Scraper, Dresser TD7G Dozer

  6. #6
    New Member
    Join Date
    Sep 2012
    Posts
    6
    Location
    O.K.C. OK.
    Tractor
    john derre 4520

    Default Re: john Deere 450d crawler/dozer

    Thankyou Mr. Gould,I'll be doing two oil changes,after replacing the fuel pump seal.

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