07 case 430 skid steer

[zhowiez]

Hi....I have a 07 case 430 skid steer and it's having trouble shutting off....I have replaced the fuel shut off selinoid on the injection pump but it didn't help....starts and runs fine but when I try to turn it off the engine slows down and after about 5 mins it finally dies. And ideals?

 

[flyerdan]

I'm assuming that the fuel shutoff is similar to Bobcat machines, so I'm working off that idea.
The normal state of the the shutoff lever is off, it is spring loaded to return there by default, and the solenoid has a pull and a hold coil to allow operation.
What's probably happening is that the return spring is weak, or there is enough gunk built up that makes it difficult to move, or worse, something inside that's causing binding.
With the solenoid removed, you should be able to pull the lever over to the run position, release it and it should snap back to the shutoff position. The fact that is slows down and gradually stops after a bit of time indicates that something is keeping the pump shutoff lever from moving freely, and it isn't the solenoid.
Hopefully, just and old toothbrush and some solvent will free things up, or you'll see a problem with the return spring.

 

[zhowiez]

I'm assuming that the fuel shutoff is similar to Bobcat machines, so I'm working off that idea.
The normal state of the the shutoff lever is off, it is spring loaded to return there by default, and the solenoid has a pull and a hold coil to allow operation.
What's probably happening is that the return spring is weak, or there is enough gunk built up that makes it difficult to move, or worse, something inside that's causing binding.
With the solenoid removed, you should be able to pull the lever over to the run position, release it and it should snap back to the shutoff position. The fact that is slows down and gradually stops after a bit of time indicates that something is keeping the pump shutoff lever from moving freely, and it isn't the solenoid.
Hopefully, just and old toothbrush and some solvent will free things up, or you'll see a problem with the return spring.

I'm not understanding what you mean with the solenoid out....my selinoid has a plunger in it and a tiny spring inside the plunger...when 12 volts on the plunger goes up inside the selinoid...brand new part. Are you suggesting to clean out the spot where the selinoid screws into the injection pump? Also when I first removed the original selinoid there was a different spring at the bottom of the place where the selinoid screws in....should that stay in?

 

[zhowiez]

I'm assuming that the fuel shutoff is similar to Bobcat machines, so I'm working off that idea.
The normal state of the the shutoff lever is off, it is spring loaded to return there by default, and the solenoid has a pull and a hold coil to allow operation.
What's probably happening is that the return spring is weak, or there is enough gunk built up that makes it difficult to move, or worse, something inside that's causing binding.
With the solenoid removed, you should be able to pull the lever over to the run position, release it and it should snap back to the shutoff position. The fact that is slows down and gradually stops after a bit of time indicates that something is keeping the pump shutoff lever from moving freely, and it isn't the solenoid.
Hopefully, just and old toothbrush and some solvent will free things up, or you'll see a problem with the return spring.

Did not work....now I told there is something internal on the injection pump that shuts off the fuel that may be hung or sticking....it would not shut off at all today after doing what you said....had to choke it down by blocking the intake.

 

[flyerdan]

Did not work....now I told there is something internal on the injection pump that shuts off the fuel that may be hung or sticking....it would not shut off at all today after doing what you said....had to choke it down by blocking the intake.

Apparently this is an entirely different type than the Kubota pumps that I'm familiar with, and I can't seem to find a good picture of a 432t/m3 injector pump to make any educated guesses.
Hopefully someone familiar with this engine family can chime in with an idea.