Kubota kx040-4 won’t start

[Beech123]

Hi all. I have a Kubota kx040-4 that just shut off while tramming, like you turned off the key switch. It will crank but not start. It has zero error codes, I have some fuel coming out of the injector pump but doesn’t seem like there is much pressure. Is there a check valve in the fuel rail or pump that could be stuck. How can I rule out the SCV. I have a new one, but don’t want to install it without knowing for sure that’s the problem. I can hear the SCV humming for a second when I turn the switch off.

 

[whitetiger]

Hi all. I have a Kubota kx040-4 that just shut off while tramming, like you turned off the key switch. It will crank but not start. It has zero error codes, I have some fuel coming out of the injector pump but doesn’t seem like there is much pressure. Is there a check valve in the fuel rail or pump that could be stuck. How can I rule out the SCV. I have a new one, but don’t want to install it without knowing for sure that’s the problem. I can hear the SCV humming for a second when I turn the switch off.

When you change the SCV, you have to calibrate it using Diagmaster.
Remove the fuel supply hose from the fuel filter outlet, turn the key switch to ON and see how much fuel is being pumped to the high-pressure pump.

 

[Beech123]

When you change the SCV, you have to calibrate it using Diagmaster.
Remove the fuel supply hose from the fuel filter outlet, turn the key switch to ON and see how much fuel is being pumped to the high-pressure pump.

Thank you for the response. I have good fuel coming to the pump. Where is the diagmaster port located on my machine.

 

[Beech123]

Thank you for the response. I have good fuel coming to the pump. Where is the diagmaster port located on my machine.

Since the SCV will need programmed I believe it would be best just to wait and have the machine scanned to confirm that is the problem.