L4701 intermittent shuts down

[dhhearn45]

I've had it back to the dealer twice, now the warranty has elapsed. I will be mowing a long and the tractor stalls out. If I pump the gas/diesel peddle it catches. Z??? I've changed the fuel filter drained the tank and forced compressed air to the fuel lines. Still stalls dealer couldn't find it. It is intermittent and has to be driven for 30-60 minutes. Tractor has 58 hour's on it [emoji53][emoji53][emoji22]

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[100 td]

If it's been in twice for the same problem and hasn't been rectified, it's still a warranty problem.
Being a new tractor I'd guess it's ECU controlled, so hand it back to them and demand it be fixed.

 

[scdeerslayer]

Shuts off like the key is turned off, or stumbles then shuts off like running out of fuel?

Hopefully it's not the ECU, but that should be a warranty replacement if it is since you've had it in during the warranty period for that issue.

Could it be you're moving in the seat enough for the seat switch to kill the tractor? Also there is a chance that something in the fuel tank covers the outlet then moves away.

 

[Benza]

I've had it back to the dealer twice, now the warranty has elapsed. I will be mowing a long and the tractor stalls out. If I pump the gas/diesel peddle it catches. Z??? I've changed the fuel filter drained the tank and forced compressed air to the fuel lines. Still stalls dealer couldn't find it. It is intermittent and has to be driven for 30-60 minutes. Tractor has 58 hour's on it [emoji53][emoji53][emoji22]

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Shuts off like the key is turned off, or stumbles then shuts off like running out of fuel?

Like scdeerslayer asked, does it shut down immediately, or does it stumble? You mentioned if you pump the pedal it will catch...does it stay running then? How long do you have to wait before the tractor starts again after it dies?

I've had an L3901 come in with that same problem; Turned out the bleeder bolt was just the tiniest bit loose, and after a certain point of using the tractor, it would sputter down and die. See if that's tight. Otherwise, if it's stumbling and they dying, you have a fuel issue.

If it's immediate, it's safety switch related.

 

[dhhearn45]

Like scdeerslayer asked, does it shut down immediately, or does it stumble? You mentioned if you pump the pedal it will catch...does it stay running then? How long do you have to wait before the tractor starts again after it dies?

I've had an L3901 come in with that same problem; Turned out the bleeder bolt was just the tiniest bit loose, and after a certain point of using the tractor, it would sputter down and die. See if that's tight. Otherwise, if it's stumbling and they dying, you have a fuel issue.

If it's immediate, it's safety switch related.

It stumbles. It stays running when i pump the pedal and runs till the next time. If I let it die it starts right back up.
I had a different dealer pick it up yesterday. We'll see[emoji54][emoji53]


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[Ktech101]

It definitely sounds like a fuel issue. It could be as simple as something in your fuel tank. Blowing back in the lines would only temporarily solve the issue. If you look at your water separator it may be drawn down slightly when the problem occurs and then fill back up slowly. During the time of the issue you could pull the line off the high pressure fuel pump, the one coming from the electric pump. It should have a very steady amount of flow. You can check for leaks in the system before the electric fuel pump. I have ran into some electric fuel pumps working intermittently causing similar symptoms. If your dealer hooks diagmaster to the machine they may find some dtcs to help narrow your issue down. When the problem occurs let the tractor stall out completely and listen for the fuel pump, you should be able to hear it. Hope some of that may help

 

[North Idaho Wolfman]

Blowing air in the lines on this unit is 100% BAD for it!
It has a very complex system and blowing air in it can blow seals.
It's also a High pressure common rail electrically controlled system, so "pumping the pedal" may be just working an electrical switch that is bad.

Is it a DT (geared) or an HST (hydrostat)?