DPF Regeneration driving me crazy...

[5030]

What the 'right to repair' deal is all about. I know Kubota dealers all pay an annual subscription fee to Kubota for updates on their diagnostic hardware and Kubota only 'leases' it to them, they don't own it outright.

Always been my assumption that diesels were originally designed to produce peak power at a lower RPM than a comparable gasoline engine and not having to run at rated rpm constantly.

I know my diesels all produce substantial power below 'rated rpm' I rarely run them at the rated or maximum governed rpm. The slower they turn and produce adequate power, the less fuel they consume as well.

 

[tractortroof]

Once every 60+ hours for 10-15 minutes. Don’t be so dramatic.

Kubota L3901 regeneration every 16 hours, run at 2500 rpm no idle(which is really annoying that you can’t idle these things)

 

[tractortroof]

Seriously doubt that any tractor will go 20,000 hours on the same dpf,

 

[Hozzie]

Kubota L3901 regeneration every 16 hours, run at 2500 rpm no idle(which is really annoying that you can’t idle these things)

You can idle them, you just shouldn't be doing it for extended periods of time. Yes, they will regen more often if you idle for longer periods of time, but it's a simple process. I think some should define idle as well. I consider idle to be sitting there at lowest throttle. I don't know anyone who does this while actually doing anything for more than a couple of minutes. I always run at 1200-1500 rpm as a minimum if doing anything other than sitting in one spot.

Seems to me some people just need something to complain about.

 

[Reddogs]

I put 2200 hours on a 2016 l6060 and am now coming up on 800 hours on a 2020 l6060. I can think of maybe 4 occasions where the regen was an inconvenience. 3 times were when i was moving pallets around in a barn and didnt want to run high rpms, and one when i shut it down during regen because i forgot about it. Spoiler... the neighborhood i was in looked like mosquito control was rolling through when i fired it back up. I did have a few times in the 2016 where the regen didnt want to ignite properly and smoked like crazy for a minute, but whatever. Its really going to boil down to how the engine is being run. 95% of the time, mine is running wide open and not being lugged so its burning as clean as possible so my regens are very far apart. Im sure if a person were running at low rpms and bogging a bunch, it'd regen every few hours. If thats not the case, it needs to get looked at because its probably got a bad injector or something. Personally, I dont miss breathing in diesel fumes and will gladly deal with the regen.

I guess my choice is to be calm and sit there while it does the regen, take my meds and put on my N95 mask, and keep it revd up to 22/25 rpms... or get in my old tractor with the leaky hydraulics and relax...LOL

 

[workinonit]

My dealer told me 1200 RPM if it's sitting still or not under load. That's what I've been doing. The cardinal sin is to abort a regen. That's a huge nono and will result in problems in the future. The best scenarion for these tractors is to run them under medium to heavy loads as much as possible. If I load mine up I see the soot level stabilize and sometimes it even reduces.

 

[Reddogs]

Every five hours seems excessive. Are you keeping the rpms up in the recommended operating range? DPF tractors need to be worked and not idled much.

It could be that your DPF is too clogged and is not getting full cleaned. There may be a malfunction in the regen system
but more likely the DPF needs to be cleaned. I'd contact a dealer and ask them about the problem. If nothing else they should know who cleans DPFs locally.

No, I was idling as didnt think the Kubota needed to be revd up that much.

 

[Reddogs]

No difference

Not exactly true, as the regen revs up to about 2500 rpms, and manual says put in PARK, let down FEL, and all implements, and I would not think it would let you keep a load on the PTO.

 

[jyoutz]

My VW TDI used to also do that during regen. No difference

 

[Hozzie]

Not exactly true, as the regen revs up to about 2500 rpms, and manual says put in PARK, let down FEL, and all implements, and I would not think it would let you keep a load on the PTO.

This may be for a parked regen in the case you have bypassed the previous regen process in the past. For a normal regen, none of this is needed like stated many times.

There are thousands of us having zero issues with any of this. We have tried to explain what works. Try it or don't, but it's not that hard.

 

[Reddogs]

This may be for a parked regen in the case you have bypassed the previous regen process in the past. For a normal regen, none of this is needed like stated many times.

There a thousands of us having zero issues with any of this. We have tried to explain what works. Try it or don't, but it's not that hard.

Well, I have to bypass as I am pushing over invasive trees and bushes on sand, and if its too high, it digs right in and basically sinks to the tranny....not good..

 

[JCoastie]

Not exactly true, as the regen revs up to about 2500 rpms, and manual says put in PARK, let down FEL, and all implements, and I would not think it would let you keep a load on the PTO.

that's only for a "Parked Regen" Kubota L3301 Operator's Manual (Page 39 of 115) | ManualsLib

There is an "Auto Regen" where you keep working Regeneration Operating Procedure - Kubota L3301 Operator's Manual [Page 35] | ManualsLib

 

[workinonit]

Did you buy this 3301 new? Did the dealer not go over anything about regens and what to do or not to do to minimize problems? My feeling is that you are making some critical errors handling your tractor's regen process. Things that I was warned about that cause serious and expensive problems down the road. Most of the replies in this thread have been very consistent regarding what you need to do.

 

[ericm979]

Well, I have to bypass as I am pushing over invasive trees and bushes on sand, and if its too high, it digs right in and basically sinks to the tranny....not good..

You need to develop a feel for when the tractor is losing traction and back off before it digs in. Sometimes I look at the tires- if the tread is moving and the tractor isn't, they're spinning and it's time to try something else. Our dirt is a mix of sand and loam and can have very little traction.

Running the engine too slow and repeated regen bypasses appear to be causing your regen problem. The manual should tell you what rpm range to use to keep the DPF happy. On my tractor it's marked on the tachometer.

 

[MAX-24-Dean]

Cool story bro, I've replaced four of six in my F250 at less than 95K miles.

Me too! Drive a Chevy 1/2 ton gas 6.0 engine now.

 

[Hozzie]

Well, I have to bypass as I am pushing over invasive trees and bushes on sand, and if its too high, it digs right in and basically sinks to the tranny....not good..

If you are letting it get to the tranny, you are doing something wrong to start. Not trying to be rude, but you should have better feel than that.

Without seeing exactly what you are trying to do my first inclination is to think you are using the wrong tool for the job. How big of trees, what kind of brush, what kind of sand for that matter. Not sure how much area you are working, but you may consider a different tool such as a skid steer, or even different approach with the tractor.

I get wanting/needing to work with that you have, but if you are really having that many issues with how you are doing it, you need to work out a different plan before you ruin your tractor.

 

[ljjhouser]

My Kubota manual says when the "regen" light starts flashing, then the rpm increase light will come on. At this point, you can let the tractor increase rpm until the rpm lght goes out. It is then in Auto regen. But it is easiest for me when I see the flashing regen light go on to increase the rmp on the throttle (the rpm light will go out) and just go ahead and work until the regen button goes out - the regen light will stay on until regeneration is completed. . Simply a matter of running it enough to create heat for the dpf to burn. until the light goes out. Continue work as normal during regen. From the manual -
Continue the work and increase the engine
rpm until the indicator turns "OFF".

 

[TMGT]

Seems the smaller DPF equipped CUT's can really benefit from HST when doing loader work where more controlled speeds are required, to allow for higher sustained engine speeds. Maybe a GST or even a shuttle with more speeds would also help to keep the revs up, especially while doing a regen.

Sent from my SM-G715U1 using TractorByNet mobile app

 

[jyoutz]

that's only for a "Parked Regen" Kubota L3301 Operator's Manual (Page 39 of 115) | ManualsLib

There is an "Auto Regen" where you keep working Regeneration Operating Procedure - Kubota L3301 Operator's Manual [Page 35] | ManualsLib

Correct. You do not have to park the tractor during regen. Just keep working and keep RPMs high.

 

[Jchonline]

I knew the regeneration cycle would be happening as I kept away from the larger diesels as my buddy burnt two engines up on his trucks. But the regeneration lights come on, right as I am in the middle of something, or it starts beeping and I have to stop immediately out in the field and find a empty spot to regenerate so I dont set the whole forest on fire. This is nuts...

You obviously didnt read the manual......

Rev it up to PTO RPM (or around there) and just keep working. Its just that simple