DPF

[JRH02]

The wife and I went to a town nearby for a Dr appmt and there is a pretty big Kubota dealer there. I said to her that one of these days I'm gonna stop in there instead of talk about it. But one question I have to ask of them might be better here: "When does DPF come into the scene when buying a new tractor?" It seems I've heard that it is a function of HP? Is this true of all manufacturers?

I have to say outright I would NOT buy a new tractor that required DPF. And I sure the heck would spend mega bucks and void the warranty with a defeat mod. So, folks, what's the skinny on new tractors and DPF?

 

[ptsg]

Up to 25HP, the emissions requirements can be met without DPF, DEF, EGR, etc.

25hp up to 75HP, that's were the DPF appears. On most engines, EGR and EGR coolers also come into play.

From 75HP and up, it's all the above, plus DEF.

 

[deserteagle71]

So, folks, what's the skinny on new tractors and DPF?

Much ado about nothing. That's my take after having owned a Kubota M7060 for the past 8 years.

I too was worried about the DPF (Diesel Particulate Filter). No more. Regeneration is a seamless process...if it weren't for the light coming on in the dash telling me the regen process was underway I wouldn't even know. Light goes on for about 15 minutes, then it goes back off again when the regen cycle is done. No difference in the way the tractor sounds or operates, and I don't have to do anything myself - the process is automatic.

 

[Roadworthy]

If you want to avoid a DPF shop for tractors below 25 hp or older than 2014. I had bad experience with a diesel pickup with DPF so I held the line at 25 HP when I bought my new tractor. It's adequate for me.

 

[JeepHead]

The wife and I went to a town nearby for a Dr appmt and there is a pretty big Kubota dealer there. I said to her that one of these days I'm gonna stop in there instead of talk about it. But one question I have to ask of them might be better here: "When does DPF come into the scene when buying a new tractor?" It seems I've heard that it is a function of HP? Is this true of all manufacturers?

I have to say outright I would NOT buy a new tractor that required DPF. And I sure the heck would spend mega bucks and void the warranty with a defeat mod. So, folks, what's the skinny on new tractors and DPF?

I am not a fan of emissions and swore them off after my last diesel truck. I chose a Kubota 2502 specifically to stay away from emissions. It is serving me well.

There are options, you can do a delete kit. Although, you obviously void your warranty.. You can buy an almost nearly new Kubota 2501 and add a turbo to it and get up to around 40HP. Tey will eventually have one for the 2502 as well. Or you can buy a nicer used older tractor.

 

[Minsid]

Much ado about nothing. That's my take after having owned a Kubota M7060 for the past 8 years.

I too was worried about the DPF (Diesel Particulate Filter). No more. Regeneration is a seamless process...if it weren't for the light coming on in the dash telling me the regen process was underway I wouldn't even know. Light goes on for about 15 minutes, then it goes back off again when the regen cycle is done. No difference in the way the tractor sounds or operates, and I don't have to do anything myself - the process is automatic.

Yes and no. If you are running an implement at 2k RPM across a field you won't notice. If you are doing loader work with variable RPM you will notice because you'll have to get and keep the RPM up during regen.

 

[JRH02]

My B7100 is just the physical size and HP range I need. I can get it past walk through gates and between trees in the forest. The rears are filled (CC) so it is fairly stabile and we have some pretty irregular contour and slopes. The BH comes off in and the 3 point back in place in a few hours and I have a bunch of attachments if it's worth the change over. So I guess I don't have to worry about DPF/DEF. If I went for new I definitely need the backhoe that is removable so I can use the 3 point stuff.

Frankly, if I could find a small shop or competent self employed guy I'd have the engine rebuilt. I've been into the gear box a few years ago and it literally looks like new. The clutch/PP/bearing/pilot was done a while back. It's got a zillion hours on it and the compression is down but still has sufficient power although starts hard in the cold. And I've had the unit since the early 90's so I've got a soft spot in my heart for it anyway.

It's a tough decision on which direction to go.

 

[JeepHead]

My B7100 is just the physical size and HP range I need. I can get it past walk through gates and between trees in the forest. The rears are filled (CC) so it is fairly stabile and we have some pretty irregular contour and slopes. The BH comes off in and the 3 point back in place in a few hours and I have a bunch of attachments if it's worth the change over. So I guess I don't have to worry about DPF/DEF. If I went for new I definitely need the backhoe that is removable so I can use the 3 point stuff.

Frankly, if I could find a small shop or competent self employed guy I'd have the engine rebuilt. I've been into the gear box a few years ago and it literally looks like new. The clutch/PP/bearing/pilot was done a while back. It's got a zillion hours on it and the compression is down but still has sufficient power although starts hard in the cold. And I've had the unit since the early 90's so I've got a soft spot in my heart for it anyway.

It's a tough decision on which direction to go.

If you like the B7100, it sounds like a L2501 would be right up your alley. Around here, you can find 2501's with 100 hours on them in like new condition for around $16-17K. I have seen them with backhoe offered in the low 20's. I also see nice B26TLB's offered in the mid 20's as well. The B26TLB would make for a nice machine. Neither of these have DPF.

 

[bdhsfz6]

The DPF and DEF debate has been raging here since 2014. Do a search and you'll find hundreds of posts on the subject with very few specific Kubota tractor emissions related complaints. I followed these posts with interest when tractor shopping in 2018 and I now own two DPF equipped Kubota tractors.

I've owned a total of 7 Kubotas since 1979, 5 without DPF, and I can honestly say I've noticed NO difference in performance or maintenance with the newer machines. No DPF related issues whatsoever in 4K hours.

Do I wish they didn't have DPF, sure, but it didn't stop me from buying new instead of going for a used tractor that may have someone elses problems.

Keep in mind, these observations are related specifically to Kubota tractors, and may not apply to trucks or other diesel equipped machines.

 

[jyoutz]

Yes and no. If you are running an implement at 2k RPM across a field you won't notice. If you are doing loader work with variable RPM you will notice because you'll have to get and keep the RPM up during regen.

Yes and for me that happens for 15 minutes after every 50+ hours of use.