3 hrs on 2015 NX4510 and check engine light is on after missing Regeneration

[paulfun9]

Paul: Yes I did read the entire owners manual before I drove it. The portion on the regeneration cycle is literally a couple sentences, and I did not think I would see it the first day. The manual says on page 4-39 "Also, for light load work, select 2nd gear (540E) position and set the engine speed to 1800 RPM to obtain 540 RPM at the PTO speed." My mistake was it was for EU/AU manual. I had a lot to remember and I got that part wrong.

Thank you for everyone offering help. I woke up with that check engine light on my mind.

Well hopefully you get threw the learning process of the new machine without any more complications and can sleep easy tonight! :thumbsup:

 

[paulfun9]

This is over stated. I have close to 500 trouble free hrs on my DK40 and rarely run the engine at PTO speed. I mow frequently at 2100 or so and the tractor does just fine. If I start to bog down I simply either increase engine speed or slow down mowing speed.



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If you had a tier 4 set up the practice you describe here would relate to having to hit the regen cycle much more often.

 

[IslandTractor]

If you had a tier 4 set up the practice you describe here would relate to having to hit the regen cycle much more often.

1) thanks for editing out the last sentence of my post that clearly stated that there might be differences for Tier 4

2) there seem to be a few hundred thousand Tier 4 diesel trucks running around at less than equivalent full PTO rpm that seem to function reasonably well. I'm no diesel engineer but I gotta believe that a tier 4 engine has got to be able to run at less than PTO rpm without harm.

3) bogging a diesel isn't great but you can still mow at less than PTO rpm without bogging. People do it all the time.

 

[aczlan]

The thread has been pruned. Please keep political comments in the Friendly Politics forum and keep insults or arguments to yourself.

On the subject of DPF filters and regens every 50 hours vs every 5 hours. As I understand it, the DPF is a fine ceramic(?) filter, as you run the tractor, it collects particles and stores them. When they start to plug up the filter, it calls for a regen where it gets the DPF hot enough to burn off the particles. In some designs, it adds a little raw diesel to the exhaust to help "light off" the particles in the DPF.

If you generally keep your engine running at higher RPMs (ie: 2000+ RPMs), it is more efficient. It will put out less particles and the DPF will be hot enough to burn of the particles as they get trapped in there.

As I understand it, you CAN operate your machine while its in regen mode, you just need to keep the RPMs up above 2000ish.

As for the many trucks that run at lower rpms all day, that is one of the reasons they use Urea injection systems, the Urea helps get rid of the particles and reduce the number of regens.

My friends who drive truck tell me that they can drive (made up numbers here as I don't remember the exact numbers) 1000 freeway miles on half a tank of Urea, or 600 miles in traffic.

Aaron Z

 

[IslandTractor]

The thread has been pruned. Please keep political comments in the Friendly Politics forum and keep insults or arguments to yourself.

On the subject of DPF filters and regens every 50 hours vs every 5 hours. As I understand it, the DPF is a fine ceramic(?) filter, as you run the tractor, it collects particles and stores them. When they start to plug up the filter, it calls for a regen where it gets the DPF hot enough to burn off the particles. In some designs, it adds a little raw diesel to the exhaust to help "light off" the particles in the DPF.

If you generally keep your engine running at higher RPMs (ie: 2000+ RPMs), it is more efficient. It will put out less particles and the DPF will be hot enough to burn of the particles as they get trapped in there.

As I understand it, you CAN operate your machine while its in regen mode, you just need to keep the RPMs up above 2000ish.

As for the many trucks that run at lower rpms all day, that is one of the reasons they use Urea injection systems, the Urea helps get rid of the particles and reduce the number of regens.

My friends who drive truck tell me that they can drive (made up numbers here as I don't remember the exact numbers) 1000 freeway miles on half a tank of Urea, or 600 miles in traffic.

Aaron Z

I can understand that urea systems may be part of the explanation for why some Tier 4 diesels do fine at less than "full PTO" rpm. However, aren't new VW diesels Tier 4? They are pretty good size and put out more than CUT diesel engine HP but they don't use urea as I recall.

 

[MinnesotaEric]

The thread has been pruned. Please keep political comments in the Friendly Politics forum and keep insults or arguments to yourself.

On the subject of DPF filters and regens every 50 hours vs every 5 hours. As I understand it, the DPF is a fine ceramic(?) filter, as you run the tractor, it collects particles and stores them. When they start to plug up the filter, it calls for a regen where it gets the DPF hot enough to burn off the particles. In some designs, it adds a little raw diesel to the exhaust to help "light off" the particles in the DPF.

If you generally keep your engine running at higher RPMs (ie: 2000+ RPMs), it is more efficient. It will put out less particles and the DPF will be hot enough to burn of the particles as they get trapped in there.

As I understand it, you CAN operate your machine while its in regen mode, you just need to keep the RPMs up above 2000ish.

As for the many trucks that run at lower rpms all day, that is one of the reasons they use Urea injection systems, the Urea helps get rid of the particles and reduce the number of regens.

My friends who drive truck tell me that they can drive (made up numbers here as I don't remember the exact numbers) 1000 freeway miles on half a tank of Urea, or 600 miles in traffic.

Aaron Z

Aaron,

I'm baffled: any disagreement is considered political talk?

How about tier 4? We have a linked throttle but if we use that feature the engine gums up the exhaust filter.

That a political statement?

 

[aczlan]

I can understand that urea systems may be part of the explanation for why some Tier 4 diesels do fine at less than "full PTO" rpm. However, aren't new VW diesels Tier 4? They are pretty good size and put out more than CUT diesel engine HP but they don't use urea as I recall.

It looks like they used a more efficient DPF and EGR system per Diesel particulate filter DPF FAQ, repair, cleaning, and pictures - TDI | VW TDI forum, Audi, Porsche, and Chevy Cruze diesel forum

Aaron Z

 

[IslandTractor]

It looks like they used a more efficient DPF and EGR system per Diesel particulate filter DPF FAQ, repair, cleaning, and pictures - TDI | VW TDI forum, Audi, Porsche, and Chevy Cruze diesel forum

Aaron Z

It is interesting and confusing if tractor diesels are being equipped with emissions equipment that doesn't fit into typical tractor use patterns. If tractors were generators and used almost exclusively at PTO power then an emissions system designed for that rpm would make sense. I would guess that at least 50% of tractor engine hours in CUTs involve loader work, backhoe, travel and other tasks that neither require nor typically use full PTO speeds. Did the manufacturers really choose a system that doesn't work well with 50% of typical usage patterns?

Of note, if these regen systems really do get clogged up more readily at lower rpm, then folks considering purchase should REALLY be thoughtful about what tasks they intend to use the tractor for and not over buy horsepower. If 95% of your regular tasks can be done efficiently with 45hp then why pay extra and waste extra fuel revving up a 60hp tractor to PTO speed just to keep the emissions system happy?

 

[maximus1277]

I'm gonna admit it: when its time for me to get a new tractor with emission controls, I will only buy it if there is an aftermarket delete kit I can get the same day. Tractors are not supposed to require this much planning and effort to operate. I just don't get it

 

[ToSoon]

Well hopefully you get threw the learning process of the new machine without any more complications and can sleep easy tonight! :thumbsup:

After having a long debate with myself...I decided to wait and talk to the dealer tomorrow before starting it again. I am hoping to clear the check engine light at home and then try running through the regeneration cycle. I guess at least it happened now before I can really start using it anyway.