L3130 stalls

[MT616]

Hello everyone,
I have a 2006 L3130 with 750 hrs on it (3 cylinder diesel). Recently it has started stalling. Starts and runs fine, for about 30 or 40 minutes, then just quits. It will start right up again, then die within 30 seconds or so. Let it sit overnight, and it will go back to running 30 minutes or so. Always starts right up and sounds good (to my untrained ear) until it quits - no warning, just like somebody turned off the ignition switch. Some component heating up and quitting when it gets too warm?
So far, I've run it with the gas cap loose to make sure it wasn't pulling a vacuum, changed the fuel filter element, drained out old fuel and put in fresh, and bled the air out of the fuel system. No change.
Thank you for any suggestions.

 

[Jsjac]

Couple questions?
Does it just die like turned the key switch off or does it die down?
Are you sitting back in the seat? Maybe the seat switch ?

 

[MT616]

Couple questions?
Does it just die like turned the key switch off or does it die down?
Are you sitting back in the seat? Maybe the seat switch ?

Just running smoothly and dies like the key switch was turned off - no warning that it's about to die.
One of the first things I did when I got the tractor was override the seat switch. But, I did check and the override is still good. Also, it will die when it is just sitting still and running with nobody on it.

 

[North Idaho Wolfman]

Failing stop solenoid.
Which in your case it's a run solenoid, so it failing will cause it to shut down.

 

[MT616]

I replaced the stop solenoid, but no change. Started right up with cold engine and original solenoid and ran for about 15 minutes before stopping (I wanted to raise the FEL to get it out of the way). Replaced stop solenoid. Started right up and I was feeling pretty pleased with myself until it quit after about 5 minutes. All the dash lights remain on. Still seems heat related to me; the warmer the engine is when I start it, the shorter the run time before it quits. Thank you for your ideas and suggestions. Anything else come to mind?

 

[North Idaho Wolfman]

The only other thing that comes to mind is the stop relay.

 

[MT616]

The only other thing that comes to mind is the stop relay.

I swapped the stop relay with the glow plug relay (same part #), but it didn't change anything. I would like to get it running in case we get hit with a snow storm (I live in the foothills of the east cascades). If I remove the stop solenoid and the nylon guide, and cover the hole with a blanking plate, will it hurt the engine to run it this way? I'm ok using the manual shutoff.
Since I posted earlier, the randomness of the start/stopping puts the kibosh to my heat theory. Once it actually ran for an hour before shutting down. While I was standing next to it, the rpm dropped like it was going to quit, but then picked up and continued running. It did this twice before finally dying.
Thanks again for your input.

 

[North Idaho Wolfman]

I swapped the stop relay with the glow plug relay (same part #), but it didn't change anything. I would like to get it running in case we get hit with a snow storm (I live in the foothills of the east cascades). If I remove the stop solenoid and the nylon guide, and cover the hole with a blanking plate, will it hurt the engine to run it this way? I'm ok using the manual shutoff.
Since I posted earlier, the randomness of the start/stopping puts the kibosh to my heat theory. Once it actually ran for an hour before shutting down. While I was standing next to it, the rpm dropped like it was going to quit, but then picked up and continued running. It did this twice before finally dying.
Thanks again for your input.

Yes pull the solenoid and block off the hole.
It's only splash oil up there, and it won't hurt anything to have it off.

 

[MT616]

Pulled the stop solenoid and covered the hole with a blanking plate. Runs good. Still don't know what was causing the stop solenoid to randomly de-energize.
Just want to say thanks to those who responded to my question, especially North Idaho Wolfman. This is the only diesel I've ever had and if you hadn't pointed me in the right direction, I probably would have called Messick's and tried to order an ignition module for a 3130. Would've made their day!

 

[Hugo Habicht]

Still don't know what was causing the stop solenoid to randomly de-energize.

Could be faulty wiring to the solenoid or the "ignition" switch itself or maybe a loose fuse connection. And if your tractor has safety switches that stop the engine under certain conditions that may cause that too.

You can watch the solenoid and wobble on the cables while the engine is running (should be sufficient to have the starter switch to the "run" position) and see of it pops out.

I think I would check connectors first that they are firm and if not bend the contacts carefully. Connecting a 12V light bulb instead of the solenoid may make fault finding easier.

 

[PoTreeBoy]

According to the WSM at Kubotabooks.com, the L3130 has the pull-in/hold coils setup. The relay energizes the pull-in coil and, since the tractor starts and runs for a while, isn't the problem.

Either the hold coil is bad or you are losing power to the black/white stripe terminal through a short or bad connection. You replaced the coil, so that leaves the other.