DPF Regeneration driving me crazy...

[Jchonline]

B.S. My Kubota M6060 has done 5 Regens in 75 hours. What a pain in the azz!! I run it at 2200rpm consistently.

Our M7060 did 1 in the first 65 hours, but we do a lot of brush hog mowing with it.

 

[Jstpssng]

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 when you’ve ignored the system telling you it's time to regen, as others have mentioned previously.

 

[Andy64]

2020 Yanmar YT359C. Purchased new in April and first regen was at 72 hrs and second regen was at 160. It now has 197 hrs. Both regens were done while working and I wasn’t inconvenienced at all!

 

[Reddogs]

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.

I think thats whats happening, I am trying to drive it like my John Deere 790 with turf tires, much lighter tractor and easier to manage.

 

[Reddogs]

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".

And the tractor is soon digging its way to China...LOL
I guess it takes a bit to get use to the bigger L3301...

 

[jyoutz]

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

I seriously doubt that any tractor will run 20k hours without an engine rebuild.

 

[Jims1025R]

My diesel VW Golf regenerates, it smells like a tire fire. Honestly the first time, at a Home Depot parking lot, when it was new, I thought I had burned off the alternator belt! So, once I understood, okay, I can live with it - except that the car goes in the garage every night. I pulled in in once, smelled the tire fire, and pulled it right back out to sit in the cold overnight! I wish that the instrument panel gave me a message saying: "You really don't want the car in the garage for the next XX minutes, while it makes a stink!". Yesterday, after a day of driving, I stopped at my daughter's first... sure enough, regenerating. Have at it, you're outside anyway! A good excuse to stay for dinner, as if I needed one anyway!

 

[m1garand762]

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

Your not doing something correct. My l3901 has 1 regen in 124 hours

 

[workinonit]

And the tractor is soon digging its way to China...LOL
I guess it takes a bit to get use to the bigger L3301...

What does this mean? Why is the tractor digging due to higher RPM?

 

[Reddogs]

What does this mean? Why is the tractor digging due to higher RPM?

Simple, drive on to black/sugar sand, put it against a tree and rev it up...'China' will soon show up under your wheels..

 

[Reddogs]

Your not doing something correct. My l3901 has 1 regen in 124 hours

I drove my JD 790 yesterday after I got my hydraulic cylinders back, and noticed something. I never take it off idle, unless I take it on the road, or need to lift a huge object. I must uncounciously be doing the same on the L3301...

 

[deserteagle71]

I never take it off idle

^ The whole problem in a nutshell.
I wouldn't even do that to my 60 year old John Deere diesel. Not good for it!

 

[Reddogs]

^ The whole problem in a nutshell.
I wouldn't even do that to my 60 year old John Deere diesel. Not good for it!

I know my Toyota Tacoma manual says not to leave on idle, but why is my question, does something melt or overheat..?

 

[ljjhouser]

Are we talking gas or diesel engines? Tacoma, I presume gas. Even gas engines do not reach expected performance at idle and probably become prone to fouled plugs if idled for extended periods regularly.

 

[jyoutz]

My diesel VW Golf regenerates, it smells like a tire fire. Honestly the first time, at a Home Depot parking lot, when it was new, I thought I had burned off the alternator belt! So, once I understood, okay, I can live with it - except that the car goes in the garage every night. I pulled in in once, smelled the tire fire, and pulled it right back out to sit in the cold overnight! I wish that the instrument panel gave me a message saying: "You really don't want the car in the garage for the next XX minutes, while it makes a stink!". Yesterday, after a day of driving, I stopped at my daughter's first... sure enough, regenerating. Have at it, you're outside anyway! A good excuse to stay for dinner, as if I needed one anyway!

My VW Passat had a light on the dash during regeneration.

 

[jyoutz]

I think thats whats happening, I am trying to drive it like my John Deere 790 with turf tires, much lighter tractor and easier to manage.

I sure liked those old 790s: steel everywhere and cast iron transmission cases and axles. I wish they still sold JDs like that.

 

[ericm979]

I know my Toyota Tacoma manual says not to leave on idle, but why is my question, does something melt or overheat..?

For a diesel it's the opposite- it stays too cold.

Diesels don't have throttles to restrict air flow. They're wide open all the time. The power is varied by changing the amount of fuel only. This means that diesels are cold when they are idling. That's probably not good for a non DPF engine but it's really bad for the DPF. First off because idling produces more soot for the DPF to deal with, and second because the DPF does not get hot. It needs to reach a certain temp for regen but even when not running a regen the hotter it is the more soot it burns off even without the regen.

 

[jyoutz]

For a diesel it's the opposite- it stays too cold.

Diesels don't have throttles to restrict air flow. They're wide open all the time. The power is varied by changing the amount of fuel only. This means that diesels are cold when they are idling. That's probably not good for a non DPF engine but it's really bad for the DPF. First off because idling produces more soot for the DPF to deal with, and second because the DPF does not get hot. It needs to reach a certain temp for regen but even when not running a regen the hotter it is the more soot it burns off even without the regen.

But if the diesel has a turbo, it needs to be idled before shutdown.

 

[deserteagle71]

I know my Toyota Tacoma manual says not to leave on idle, but why is my question, does something melt or overheat..?

Wet stacking - Wikipedia

en.wikipedia.org

 

[ericm979]

But if the diesel has a turbo, it needs to be idled before shutdown.

Yes the turbo need to cool down for shutdown if it was spooling hard. But the OP was asking about idling all the time.

Many modern turbo engines have after run coolant pumps specifically to cool the turbo after shutting the engine down so you don't need to let it idle.