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  1. #1
    New Member
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    Default overloads and kills engine

    I have a mini excavator that I am rebuilding (1994 Takeuchi TB15). Put in a new engine so it has plenty of power. But when I do certain moves with it the engine dies because it's being overloaded. Also the controls seem fairly jerky and not smooth like they're getting too much power even when my engine throttle isn't high. Idea why?

  2. #2
    Super Member dfkrug's Avatar
    Join Date
    Feb 2004
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    5,741
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    NorCal
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    05 Kioti CK30HST w/ Prairie Dog backhoe

    Default Re: overloads and kills engine

    It sounds like you might have an hydraulic obstruction, which causes the pump to go to
    relief. Double check your hoses and QA fittings to be sure nothing blocks flow.

    Jerky movement may point to low hyd fluid, or clogged inlet screen to pump.

  3. #3
    Elite Member
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    Sep 2007
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    3,442
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    Doniphan, Mo.
    Tractor
    Kubota L4240, B7800 & BX2660

    Default Re: overloads and kills engine

    Check your hyd plumbing, it's being deadheaded right after the control valve.

  4. #4
    Super Star Member Kyle_in_Tex's Avatar
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    Oct 2002
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    11,471
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    Giddings, Texas
    Tractor
    JD 4310,JD5420

    Default Re: overloads and kills engine

    Quote Originally Posted by Leejohn View Post
    Check your hyd plumbing, it's being deadheaded right after the control valve.
    This, a deadhead.
    One of these days....One of these days...

  5. #5
    Elite Member
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    Jan 2010
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    3,893
    Location
    Northern, IL
    Tractor
    Branson 2400H, JD X540

    Default Re: overloads and kills engine

    Sigmatero
    You state that some functions cause the engine to stall. Does this mean that some functions work properly?

    If yes are there two separate valve stacks on your excavator?

    Since you are rebuilding this machine have some of the hydraulic lines been removed or disconnected?

  6. #6
    Platinum Member
    Join Date
    Nov 2008
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    732

    Default Re: overloads and kills engine

    Open center or closed center? I know very little of closed center, but I would expect this machine to use it, and if so, it sounds more like a load sense problem than a smashed cylinder tube.

  7. #7
    Super Member dfkrug's Avatar
    Join Date
    Feb 2004
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    5,741
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    NorCal
    Tractor
    05 Kioti CK30HST w/ Prairie Dog backhoe

    Default Re: overloads and kills engine

    Quote Originally Posted by Groo View Post
    Open center or closed center?
    Yeah, this is important.

    Many mini excavators when to a dual HST drives in recent years, and I, for one, do not
    know what an old small Takeuchi uses. The mini I am working on now is very simple: it
    uses a single gear pump and open-center hydraulics, just like CUTs.

    Now, off to order more %$*#(T^ metric adapters......

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