DPF Regeneration driving me crazy...

   / DPF Regeneration driving me crazy... #171  
I have a 2019 Kubota L6060 with a DPF and was concerned about that system when I bought it, simply because of all the negative information on this forum. My personal experience has been as follows:
1) running the tractor at high rpms does not reduce the time between regens
2) working it under a load, will reduce the regen times and may actually lower the soot levels. I have seen my soot levels drop significantly while using the snowblower while traveling uphill. I suspect that if the tractor is worked hard all the time, it may never regen.
2) when the tractor wants to do a regen, let it and if it calls for more rpms then give it more. Just keep doing whatever you are doing!
3) The only parked regen I have ever done was not actually a "parked regen" because I did not stop the regen, I simply parked the tractor when it started a regen and left it until it was done. Salesman told me that all the problems he ever heard of with regens were caused by the operater not following the proper protocol or stopping regens and not responding properly.
4) I let it idle between operations, just like any tractor.
5) Mine is HST and I run it at around 1500 rpms for most operations (with the auto throttle advance engaged)
5) I have 510 hrs on this tractor and not had any issues with the regen process.

After almost 3 years of use, I have determined the best way to use this tractor is the same way I used my previous tractor and just ignore the Regen process, until I see a flashing light that tells me I need to increase rpm's. I then increase the rpm's until the flashing stops and continue working. I will let the tractor idle when I get out to do something.

For me, this is a non issue.

Before I bought this tractor, I was told the biggest problem with these DPF systems is operator error. Maybe I got lucky or other tractor makes / models are prone to issues.
 
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   / DPF Regeneration driving me crazy... #172  
^^^^
My biggest problem was figuring out what to do the first time that it wanted to regen. Of course I was 1/4 mile from the house where my manual was, and the decal on the machine may as well have been duck footprints. By the time I figured out what to do it did need a parked regen... the only one I’ve had in 600 hours.
 
   / DPF Regeneration driving me crazy... #173  
Well, mine is coming on after 5-6 hours, basically every other day when going hard, so its a bit much. Doesnt seem normal to me, but manual doesnt say anything on how to reduce it...
Haven't read through all the posts yet, but you've probably got an injector issue (too rich, dumping excessive fuel).
 
   / DPF Regeneration driving me crazy... #174  
Curious what folks' manuals say for operating RPMs during regens. Kioti says 1,800 rpm (or above): this is hardly "high" RPMs. In 720 hrs I think I've had two parked regens* (one for sure [when relatively new]- other one might have been that I had to get out of the tractor to do stuff -usually stay in the tractor and keep working). Can't say how often my Kioti regens, but it's rather infrequent and I usually still have work I can do.

* I'm wanting to say that the parked-regen process actually cycles engine RPMs a bit, and it's way that you know it's different from a passive regen.

Regarding ULSD, reduction in sulfur is actually better for engines. See: sulfuric acid.
 
   / DPF Regeneration driving me crazy... #175  
Regarding ULSD, reduction in sulfur is actually better for engines. See: sulfuric acid.
Even my old 1984 L275 smoked a lot less after the fuel change, and that looked like a coal burner at times.
 
   / DPF Regeneration driving me crazy... #176  
My Kubota manual is vague about rpm's...
"Prohibition of unnecessary idling operation Generally, the lower the engine speed, the lower the exhaust gas temperature is, so the PM contained in exhaust gas will not be burnt, and begins to accumulate. Therefore, don't idle unnecessarily."

I have the idle set at 1500 rpm or so, and usually shut the tractor off if it's just going to be sitting for 5-10 minutes.

The manual is very specific about the various regeneration stages, but there is no way I'm going to remember all the levels, actions, beeps, flashing light sequences.
My take for the Kubota Regen is:
- Don't idle for long periods
- Don't unnecessarily use the DPF Inhibit switch
- Watch for the Regen and Raise RPM lights
- When the machine starts beeping, the clock is ticking.

My regens have always been smooth, totally unremarkable, and all done while using the tractor. My dash reports the particulate matter %, so I have a good idea when it's going to regen, and I save small projects to make sure I have work to do for the 15 minute process.
 
   / DPF Regeneration driving me crazy...
  • Thread Starter
#177  
Haven't read through all the posts yet, but you've probably got an injector issue (too rich, dumping excessive fuel).
Can fuel treatment help that or you have to take it to the dealer?
 
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   / DPF Regeneration driving me crazy...
  • Thread Starter
#178  
My Kubota manual is vague about rpm's...
"Prohibition of unnecessary idling operation Generally, the lower the engine speed, the lower the exhaust gas temperature is, so the PM contained in exhaust gas will not be burnt, and begins to accumulate. Therefore, don't idle unnecessarily."

I have the idle set at 1500 rpm or so, and usually shut the tractor off if it's just going to be sitting for 5-10 minutes.

The manual is very specific about the various regeneration stages, but there is no way I'm going to remember all the levels, actions, beeps, flashing light sequences.
My take for the Kubota Regen is:
- Don't idle for long periods
- Don't unnecessarily use the DPF Inhibit switch
- Watch for the Regen and Raise RPM lights
- When the machine starts beeping, the clock is ticking.

My regens have always been smooth, totally unremarkable, and all done while using the tractor. My dash reports the particulate matter %, so I have a good idea when it's going to regen, and I save small projects to make sure I have work to do for the 15 minute process.
I am trying to raise it up above 1500 rpms now when doing any work, to see if that makes a difference. So far, no regens..
 
   / DPF Regeneration driving me crazy... #179  
I just wonder - are all these added steps required to reduce/effect Regen actually reducing overall pollution. This entire process of regeneration would seem to be counter productive.
 
   / DPF Regeneration driving me crazy...
  • Thread Starter
#180  
I just wonder - are all these added steps required to reduce/effect Regen actually reducing overall pollution. This entire process of regeneration would seem to be counter productive.
It never was about 'pollution', its all about control, and when they come out with 'electric tractors' it will become clear.....
 

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