Case 580k fuel issue

Steve111 · Mar 2, 2020

Hey guys I've been having a stange problem lately. When I go to start the tractor it cranks but won't get any fuel to start running. I have to go in and crack the fuel relief screw on the engine and I let the fuel from the line out and then I can start it up no problem. Then once I turn it off and try to start it again I get the same issue. I can't figure out what it is. There is no air coming out of the line either when I crack the bleed screw.

AllDodge · Mar 2, 2020

Sounds to me like something is allowing fuel to drain out or back to the tank when shut down. Fuel shut off may not be sealing full closed. Happen to see any wet areas when fuel my be dripping?

Steve111 · Mar 2, 2020

There was a leak in the fuel filter housing but I fixed that right before this started. Now I have no leaks but it doesn't like to start. It seems like the fuel is staying pressurized and something is preventing it from getting to the injectors. I can start it on ether and then it just dies immediately once the ether is done. Then I can crack the bleed valve and let the fuel out in the line then it starts up no problem.

Willie B · Mar 2, 2020

Mine won't always pick up fuel when the tank isn't full. I believe when the fuel level is below the priming pump it struggles to prime. An electric lift pump could be added, or keep it full.

Tinkerer · Mar 2, 2020

Test the check valve. # 10a

Steve111 · Jul 9, 2020

Bringing this back up from the dead. Still. Have not figured out the issue. Whenever I turn it off and then try to start it back up before letting it sit for a good hour it just cranks and doesn't even act like it's getting fuel. If I open the top air bleed screw a bunch of fuel under pressure squirts out then stop then I am able to start it right up like normal. No idea what the heck is causing this still. It happens every single time I turn it off then try to start it back up within around 30 minutes to an hour. If it sits for longer the pressure goes down in it and it will start normal without opening that air bleed screw. No air comes out by the way from the bleeder just a spurt of fuel.

highwayghost · Jul 9, 2020

Is the breather on the fuel tank open, maybe the tank is holding pressure?? Try removing the fuel return line.

Willie B · Jul 9, 2020

My theory is a small air leak between the mechanical fuel pump & the "tank" (one side of the loader frame). It sucks a bit of air, forming a cushion so a pulsating diaphragm pump isn't effective.

Is it better when the tank is absolutely full?

Another theory: You pull a vacuum in the tank cause the cap is airtight, fuel pump can't overcome.

Mine starts slower when the tank isn't full, or when I've been running it a while.

highwayghost · Jul 9, 2020

Willie B said:
My theory is a small air leak between the mechanical fuel pump & the "tank" (one side of the loader frame). It sucks a bit of air, forming a cushion so a pulsating diaphragm pump isn't effective.

Is it better when the tank is absolutely full?

Another theory: You pull a vacuum in the tank cause the cap is airtight, fuel pump can't overcome.

Mine starts slower when the tank isn't full, or when I've been running it a while.

I said pressure, what I meant was a vaccum,

... Willie got it right!

Steve111 · Jul 12, 2020

Going to have to try to test that. I don't think there is a vacuum. It all started when I replaced the fuel filter gasket that connected the two filters to the cylinder head. It was leaking when it was on from large oring and after I replaced it that's when the issue started, never before that time.

Tinkerer · Jul 13, 2020

OEM O ring ?
Regardless if it is or not get a new that matches the old one that leaked.
That is what I would do.

Tenwheeler · Jul 13, 2020

Just replaced the o-ring or o-ring with filter? I have seen more than one bad new filter over the years.

alrman · Jul 14, 2020

I've come across this problem before.....
The fuel supply builds up pressure to the injector pump while cranking, - won't start. Once you release the pressure the machine starts.....
Eventually the fuel shut off solenoid failed on this machine - it was replaced & the problem was gone ...... go figure

Might be worth a shot

Steve111 · Jul 14, 2020

Ordered d a new fuel shut off solenoid. Only 45 bucks. Worth a shot. Coming next week will let you guys know how it goes.

Steve111 · Jul 26, 2020

OK put the new fuel shutoff solenoid in and it gets 0 fuel at all now to the injection pump even while attempting to hand prime. Put the old one back in and it starts and runs but has same issue. No God damn idea what this is now. With the new solenoid in the bleed screw on the injection pump doesn't produce any fuel from it at all. The one above the dual fuel filter pumps fuel out just fine. Am I missing something here? I don't get how the old one works but the brand new one blocks all fuel going to the injection pump even using the hand primer. I'm beginning to think that I should have left the little fuel leak I had before from the fuel filter head plate because all these starting problems started after I fixed that.

Steve111 · Jul 26, 2020

Also I did this yesterday. Put new solenoid in and no good nothing at all no fuel flow. Put old one back in and got it running. Used the machine this morning then decided to try the new one again and put it in and it won't run no matter what. It won't get any fuel into the injection pump it seems with the new one. Possibly it's faulty? It's a brand new one from broke tractor and the exact same part.

thepumpguysc · Jul 26, 2020

Some/ A LOT of pictures might help.??

AllDodge · Jul 26, 2020

For it sounds like the old shut off was not really shutting off, and could be wiring controlling it is also at issue

Steve111 · Jul 26, 2020

I would assume that if the old one was never really shutting off wouldn't the machine just keep running? Going to have to test both of these shutoffs tomorrow morning out of the machine.

Tinkerer · Jul 26, 2020

It may be an injection pump problem with the shut off, and not the solenoid at all.

Case 580k fuel issue

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