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Case 580 b no fuel to injectors

Discussion in 'Tractor/Loader/Backhoes' started by grt_580b, Feb 21, 2021.

  1. grt_580b

    grt_580b Member

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    So my 580b was running while I was replacing the power steering cylinders and bleeding them, and it sputtered and died. I thought it ran out of fuel so I put more in it and opened the bleeder on the filter, I had fuel there so I cracked the supply line to the pump and had fuel there. I cracked an injector line on the pump and no fuel was coming out. So I cracked all 4 injector lines at the pump and cranked it untill the battery ran down in 15-20 second intervals. Never got fuel to the injector lines. I also took the return line off and removed the elbow and never saw fuel there either.... Not sure where to go next, there's full at the pump but none to the injector lines... Any ideas phil?
     
  2. Midnightmoon

    Midnightmoon Senior Member

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    Check the fuel shut off. What's the serial number
     
  3. Tinkerer

    Tinkerer Senior Member

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    Remove the petcock (shutoff) valve from the fuel tank.
    It has (should) have a screen on it. It may be plugged.
     
  4. grt_580b

    grt_580b Member

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    If I remove the supply line to the pump fuel flows freely out of the line so I don't think the per cock is stopped up but I'll take a look anyway
     
  5. Larryv

    Larryv Member

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  6. Larryv

    Larryv Member

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    Remove the inlet elbow on top of pump. It threads in to another straight fitting. Remove that fitting and look at bottom. S/b a small opaque ball inside held to seat
    With a very lite spring.Small bits of crap will get behind ball and prevent it from opening. Try to flush out so ball will depress a little . If wont move you can knock it out from the top with a small punch.
     
  7. Larryv

    Larryv Member

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  8. Larryv

    Larryv Member

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    Oops. Not the inlet line but the return line in top cover of pump.
     
  9. Larryv

    Larryv Member

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    What happens is the return line blocks flow of fuel and pressurizes the pump and it will shut down. Usually in this case the eng will start and run for a few seconds and shut off again. If it wont restart at all, could have broken drive shaft. Let me know and I can explain how to check cor for that
     
  10. grt_580b

    grt_580b Member

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    Mine is just an elbow on the return line there's no check in it. I've tried taking it completely off and cranking it and no fuel comes out at all...
     
  11. Larryv

    Larryv Member

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    Loosen screws on inspection window on side of pump. Remove top screw and rotate cover out of way. Inside are 2 discs, front disc driven by eng. While viewing discs, turn over eng and see if front disc rotates. This will rule out mechanical failure.
     
  12. thepumpguysc

    thepumpguysc Senior Member

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    U can also remove the INLET FITTING.. fill the pump INLET w fuel up to the top..
    Spin the engine.. if the fuel is still there, u have a serious mechanical failure..
    If it’s gone, there’s still hope..
     
  13. grt_580b

    grt_580b Member

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    Already checked that the pump is turning so not mech failure...
     
  14. grt_580b

    grt_580b Member

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    I haven't tried manually putting fuel in the inlet I'll try that next
     
  15. Dave Neubert

    Dave Neubert Senior Member

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    Did you ever check to see if you have power to the fuel solenoid on the pump
     
    Vetech63 likes this.
  16. Bluox

    Bluox Senior Member

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    Kinda drought that tractor has a solenoid.
    Butt I guess it wouldn't hurt to make sure the fuel shutoff lever is all the way ahead.
    Bob
     
    Last edited: Feb 27, 2021
  17. stinky64

    stinky64 Senior Member

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    I don't know if I'm mistaken, but I could swear that I read somewhere, don't know if it was here ,in some manual or some place else about not letting your power steering reservoir run dry or it could maybe snap the skinny part of the fuel pump drive shaft, so I'm very aware of the steering juice level..May be mistaken, but that sticks in my noggin and ironically you were bleeding the steering system when failure happened...Are you sure the pump is turning? Just a thought...Pumpguy am I crazy?
     
  18. thepumpguysc

    thepumpguysc Senior Member

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    I never heard of such.. but.. u/they gotta know/find out if it is turning..
    Easiest way I know of is fill the inlet w fuel.(take off 90* fitting) & crank the engine.. if the internals are moving, it’ll suck the fuel down..
    If the pump is seized, the fuel will stay put..
     
  19. stinky64

    stinky64 Senior Member

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    Maybe it had to with the p/s pump stopping abruptly may cause damage to inj. pump shaft...damn now I have to find it..
     
  20. grt_580b

    grt_580b Member

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    You are correct there is no solenoid and the shut of lever/choke is all the way foreward