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Duetz 1011f

Discussion in 'Skid Steers' started by Cboyd43, Mar 4, 2022.

  1. willie59

    willie59 Administrator

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    I agree, that's the next thing I'd do. If it remains the same I suppose I'd next swap injection pump units. After that, with no compression test, I see head removal, could be a bent connecting rod, I've seen that happen on a 4-53 Detroit before
     
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  2. Cboyd43

    Cboyd43 Member

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    It was acting this way before the injector change also.it didn’t have a miss so bad today when I ran it. Definitely a “tick” sound but I pulled the valve cover and looked down ea h of the lifters and they all looked straight. Ran a little bit with the valve cover off and all seems to work to me. The 2nd cylinder rockers seem a little offset towards the back of the machine but looks to work correctly. I was going to pull the cover off the lift pump but there is a bracket at the same level as the screw. So didn’t get that off. Did pull the fuel filter off just to check and looked clean and no rust or anything. Seems like a fuel issue to me bur not having much luck.
     
  3. willie59

    willie59 Administrator

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    That's the trick, issues like this are not easy to diagnose without being there because there's a number of things can cause your problem. Yes, insufficient fuel deliver can make diesel engines do weird things, like smoke, miss, tick, because the fuel pressure isn't correct at the injectors from lack of fuel. Got to eliminate all of the external possibilities before you tear into the engine.
     
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  4. Cboyd43

    Cboyd43 Member

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    I’m going to drop fuel filter and drain the tank and replace rest of the fuel line from tank to motor. I had it trailed one time to take to my brother in laws and put full tank of fuel in….seems to have been when it started to act a little funny. The cylinder that I feel to have issues with is the first one in line from pump. But seems to come out of the miss fire after a few minutes of running…..I was looking at the lift pump, how the heck do you pull that end cap off with a engine support deed even with the screw??
     
  5. MarshallPowerGen

    MarshallPowerGen Senior Member

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    Any chance you have an inline filter coming right off of the tank that hasn't been changed? I've run into a few Gehls that had just that clogged up and buried in mud so they were never noticed over multiple services.
     
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  6. willie59

    willie59 Administrator

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    Not only that, but since you mentioned inline filter, and may not be the case here if he doesn't have one, but many folks don't know that typical inline filters are for gasoline, the filter media doesn't really like diesel fuel. One would be better off with an inline mesh strainer for diesel applications to prevent heavy debris from going through the lift pump, then let the fuel filter catch the fines.
     
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  7. Cboyd43

    Cboyd43 Member

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    I followed all the fuel lines. Nothing in line, and no primer ball like I have read about. To me the fuel line shave maybe been replaced at one time as there are actual hose clamps in spots vs the spring loaded style. I have read there is a mesh screen in the lift pump. The screw to that is t too assessable as it’s right in line with a bracket coming off the machine and holds the motor in place.
     
  8. willie59

    willie59 Administrator

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    There were several types of lift pumps used on Deutz engines. Typically, if it has a single screw in the center of the cap on the lift pump it has an internal screen. If it's a number of screws around the perimeter of the cap of the lift pump it doesn't. And yes, even with no engine mounting bracket in the way that pump mounting screw close to the timing cover is a PITA to get to
     
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  9. Cboyd43

    Cboyd43 Member

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    Yea it’s a single screw in center. I might try a flex bit to get to it. I’ll see what tomorrow brings. Thanks for all the input BTW Any special fuel additive you would suggest?
     
  10. willie59

    willie59 Administrator

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    Additive is a whole 'nuther topic, opinions are without number, additives to increase lubricity, which one is better, never ending question. Best advice I can offer...keep the tank fuel of fuel at all times to prevent condensation, water is your worst enemy.
     
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  11. MarshallPowerGen

    MarshallPowerGen Senior Member

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    Can't remember the torx size for the lift pump (T25, T27?), but it should come off easy. Screen will be full of debris usually that can be brakekleened out, and o-ring will be fine for reinstall.
     
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  12. Vetech63

    Vetech63 Senior Member

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    Where did you get these injectors and from who?
    This is usually unburned fuel
    Not good!
    More than likely that is unburned diesel fuel.
    A pre-ignition knock maybe?
    Engine oil is easier to see............diesel not so much.
    Possibly a leaking injector tip when it sits.

    I'll take "You bought junk injectors" for $200.00 Alex.
    I'll also take "You ran the engine like this for too long before fixing the issue" for $400.00 Alex
    Lastly, I'll take "The ticking noise is the connecting rod bearing starting to come apart because of long term pre-ignition and now your cylinder is out of time" for $800.00 Alex.
    (or the piston has lost a skirt due to pre-ignition and that's causing the ticking)

    You really should drain the engine oil and cut open your engine oil filter before you go any further. At least prove me wrong here.
     
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  13. Cboyd43

    Cboyd43 Member

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  14. Cboyd43

    Cboyd43 Member

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    I replaced all the fuel lines, emptied fuel out, and replaced fuel filter. The smoke is mostly gone now. A little bit that’s hard to see. It still has a tick noise. It did have a little pulse going when the throttle is low. I’m still not 100% how you get that filter out of the lift pump. The screw is literally in line with a bracket maybe 1/2” clearance