John Deere 6930 problem I think ?

[Deepseaman]

Recently pulling the rake up the road , our 6930 suddenly developed a vibration and lost power , didn’t sound right , pulled into the job , checked , turned off and restarted, seems ok now . Suspect she may have dropped an injector?? No warnings came up , but have these fault codes showing.
I know the top one is front pto , not sure on the bottom one however.
any advice welcomed.

 

[flywheel]

Best to get dealer out with laptop.

 

[Timbo]

In the BCU

1882.15 is front PTO speed detected when PTO is switched off

523812.11 isn't listed. Which controller is this stored in?

 

[Deepseaman]

In the BCU

1882.15 is front PTO speed detected when PTO is switched off

523812.11 isn't listed. Which controller is this stored in?

Unsure , it’s on bcu 001.

 

[Deerefarmer]

523812.11 isn't listed. Which controller is this stored in?

That is a pto code on a 7r fwiw, as in RPT 523812.11 power assisted pto shift actuator fault

 

[Timbo]

Unsure , it’s on bcu 001

Clear both codes, drive tractor and check again...

 

[Deepseaman]

Clear both codes, drive tractor and check again...

Ok will try this , thanks

 

[Deepseaman]

That is a pto code on a 7r fwiw, as in RPT 523812.11 power assisted pto shift actuator fault

Interesting likely the same then .

 

[Timbo]

Interesting likely the same then .

All the 523812.xx codes for a 30 series relate to rear PTO engage & speed select solenoids, but there is no .11 code listed.

09 & .12 yes

 

[Deepseaman]

All the 523812.xx codes for a 30 series relate to rear PTO engage & speed select solenoids, but there is no .11 code listed.

09 & .12 yes

Ahh ok thanks for the info

 

[Deepseaman]

So it would seem that there is no fault code relating to the engine , so has anyone experienced the listed symptoms?

 

[rollestonpark]

diesel clean and free of water? inc the filter ?

 

[Deepseaman]

diesel clean and free of water? inc the filter ?

I believe so , filter not due for a change yet , will have another look however .

 

[Timbo]

I believe so , filter not due for a change yet , will have another look however .

Still got the braided fuel lines ?

95% of the time though, if there is a fuel supply issue, dodgy injector , or similar issue going on, even if intermittent, theyll flag faults like Christmas.

 

[Deepseaman]

Still got the braided fuel lines ?

95% of the time though, if there is a fuel supply issue, dodgy injector , or similar issue going on, even if intermittent, theyll flag faults like Christmas.

yes still got some braided lines , does not seem to have any related fault codes , only those above , bit concerning as don’t need that happening again

 

[czechmate]

The most bizarre fault I had on my 6930 (and I don’t think it’s this) was a terminator packing up, tractor didn’t know if it was coming or going and in the end was throwing up faults faster than I could delete them

 

[Phil P]

So it would seem that there is no fault code relating to the engine , so has anyone experienced the listed symptoms?

If I had to have a wild stab in the dark I’d say one if the excess fuel shutoff valves (on top of the fuel rail) is closing due to either a faulty injector of a leak on the stand pipe that supplies fuel to the injector (located in the side of the head). Once they close the only way to reset them is to stop the engine and let the pressure in the rail drop.
Try getting the engine up to temp then if possible run at full load (max fuel pressure) high gear and a steep hill usually work and see if you can replicate the fault.
This problem won’t produce a fault an ecu fault code as it’s a mechanical shut off valve. Once the fault is active though it’s easy to test which injector it is using the diagnostic software doing a misfire test but you’ll need a dealer or someone with the diagnostic software for that.

 

[Deepseaman]

If I had to have a wild stab in the dark I’d say one if the excesses fuel shutoff valves (on top of the fuel rail) is closing due to either a faulty injector of a leak on the stand pipes that supplies fuel to the injector (located in the side of the head). Once they close the only way to reset them is to stop the engine and let the pressure drop.
Try getting the engine up to temp then if possible run at full load (max fuel pressure) high gear and a steep hill usually work and seep if you can replicate the fault.
This problem won’t produce a fault an ecu fault code as it’s a mechanical shut off valve. Once the fault is active though it’s easy to test which injector it is using the diagnostic software doing a misfire test but you’ll need a dealer or someone with the diagnostic software for that.

Thanks , will try this and check , quit possible as was pulling up hill at the time.

 

[Timbo]

The most bizarre fault I had on my 6930 (and I don’t think it’s this) was a terminator packing up, tractor didn’t know if it was coming or going and in the end was throwing up faults faster than I could delete them

OP doesn't have any communication faults.

But I agree random and strange multiple controller errors are often terminators failing. They never seem to suddenly completely fail, just go abit wonky

 

[Timbo]

If I had to have a wild stab in the dark I’d say one if the excess fuel shutoff valves (on top of the fuel rail) is closing due to either a faulty injector of a leak on the stand pipe that supplies fuel to the injector (located in the side of the head). Once they close the only way to reset them is to stop the engine and let the pressure in the rail drop.
Try getting the engine up to temp then if possible run at full load (max fuel pressure) high gear and a steep hill usually work and see if you can replicate the fault.
This problem won’t produce a fault an ecu fault code as it’s a mechanical shut off valve. Once the fault is active though it’s easy to test which injector it is using the diagnostic software doing a misfire test but you’ll need a dealer or someone with the diagnostic software for that.

Phil, wouldn't a standpipe or PRV issue cause a low rail pressure or desired v actual fault code ?