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Thread: Runaway Multifuel!! Now what do I do?

  1. #11
    4 Star General /Moderator doghead's Avatar
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    No, Post in the correct forum, only.

    M817, M818, M819, M35A2 w/w, M35A2, M109, M105, M116A2, M101A2, Pioneer tool trailer, MEP-002, MEP-017A, 5ton winch shear pins, Oral-B toothbrush

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  3. #12
    dumpsterlandingfromorbit! gimpyrobb's Avatar
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  5. #13
    4 Star General Floridianson's Avatar
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    Quote Originally Posted by country View Post
    This is not an uncommon occurrence

    The fuel shut off did not get set right when you put the pull cable control cover back on

    you need an engine

    Dave
    I agree with the cut off did not get behind the fuel control. If that happened and the fuel control was just a tad tight but still moveable he could have left shut down cover off and just used his finger to pull back the fuel control to the 4 o'clock position. Very important that the fuel control moves with no binding at all. Orren I think had the best idea of a electric fuel shut off wired to the master. Fast and easy way if there is a problem. Always check the fuel control if the truck has not been running for awhile as it very easy to check.
    Real trucks don't have spark plugs! Me strong as bull smart as tractor. James

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  7. #14
    4 Star General Jericho's Avatar
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    Free the rod , ensure you have positive cut off and crank it up to idle. Listen , observe, the Engine will tell you if its ok thru its performance and noise. Makes no difference if it were a fuel or oil runaway in the scheme of things, Find the problem , correct it and then when safe recrank it and see how it runs, Not a deuce , BUT, my D-7 had a bad turbo seal, ran away twice, first time it lasted a full minute before I got to it and got it shut down, had been at idle, smoked like a beast, rev ed more than I had ever heard from that cat , but cleaned it up, serviced , sent to shop. Shop CLAIMED they "cured" it, few weeks later, runaway! , no shop this time , r 2 ed the turbo, ran fine for the next 15 years. Never a blip from the engine, Good CAT product. Fix it run it, if its goes TU later change it, Cant hurt it if its already toast, Cant get your moneys worth from it if you change it before you listen to it! Just an Observation!

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  9. #15
    4 Star General Floridianson's Avatar
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    Quote Originally Posted by 74M35A2 View Post
    Iíve seen this exact thing happen. Getting the tension right on that shaft is a science. Even the wrong O rings can make it happen.

    Post it in the Deuce forum, those engines are way more prevelant there. They will guide you to fixing it right.
    I have never had a problem with the screws being to tight that hold the fuel control in the Head. Also I use the O ring that came with my rebuilt Ambac Heads. Funny though this guy had a problem and not over tightening cured the sticky shaft.
    Last edited by Floridianson; 01-13-2018 at 19:36.
    Real trucks don't have spark plugs! Me strong as bull smart as tractor. James

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  11. #16
    2 Star General airbornebandsman's Avatar
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    I am having a major issue with fuel entering the oil, to the point where the fuel/oil mixture it is draining from the slobber tube. I emptied 10 gal of oil/diesel from the pan. Would a leaking shutoff o-ring allow fuel to mix with the oil at some point in the IP? Would rather fix that than the other alternatives.
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  13. #17
    2 Star General fasttruck's Avatar
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    Put the truck in high gear and stall the engine.

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  15. #18
    4 Star General FloridaAKM's Avatar
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    Time to pull my HH off again Saturday & see if my button fell off during last assembly. As far as preventing a runaway, the 1" port on the back side of the air filter box will have a 1" heavy rubber hose that leads all the way over to the air compressor to its intake port. I did this to my first Deuce & it worked well as method of stopping dirt from getting into the compressor & plugging up the air hole if you have a runaway situation & are trying to block the air flow. It also helps if you want to get into a highwater fording situation. Wish me luck!
    1985/87 M35A2C Wo/w Deuce x 2
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