DPF

[JRH02]

So? They gonna come to your house?

They better have 4WD with plenty of ground clearance. And they will probably get lost. That's how people usually show up here.

 

[deserteagle71]

So? They gonna come to your house?

Sure they will. Already do, in some states. Haven't you been reading any of Ultrarunner's posts about life in California? If it becomes National policy then whatever Texans prefer won't matter.

 

[walnutman]

Sure they will. Already do, in some states. Haven't you been reading any of Ultrarunner's posts about life in California? If it becomes National policy then whatever Texans prefer won't matter.

We'll see about that

 

[SatchmoIsBack]

Sure they will. Already do, in some states. Haven't you been reading any of Ultrarunner's posts about life in California? If it becomes National policy then whatever Texans prefer won't matter.

New Administration, New Rules, New Sheriff in Town --

AI sez ~

New EPA rules, announced in August 2025, provide updated guidance on Diesel Exhaust Fluid (DEF) systems for nonroad equipment like farm tractors, aiming to prevent sudden and severe power loss in case of malfunctions. The guidance mandates that nonroad equipment must operate without power loss for at least 36 engine hours after a DEF system issue, followed by a 25% and then 50% torque reduction over time, with limited engine restarts allowed. This aims to increase operator confidence in the equipment while still encouraging emissions reductions.
Impact on New Diesel Tractors

• Less Sudden Power Loss:New diesel tractors will be designed to run for a longer period, up to 36 engine hours, before experiencing a significant power reduction if the DEF system malfunctions.
• Phased Torque Reduction:If the DEF issue isn't serviced within 100 engine hours, the tractor will then experience a 50% reduction in engine torque.
• Limited Restarts:Operators will have the ability to restart the engine with full power for up to 30 minutes, three times, after a DEF malfunction occurs before the torque reduction takes effect.

What This Means for Farmers

• Reduced Downtime:Farmers will experience less immediate and drastic disruption to their work if a minor DEF issue arises.
• Increased Confidence:The guidance gives operators more time to diagnose and service the equipment, reducing concerns about equipment becoming inoperable.
• Potential Removal of DEF Systems:Some experts believe this change could signal a move away from including DEF systems on future farm equipment, although this will take time.

Context of the Changes

• Addressing Operator Concerns:The new guidance addresses complaints from farmers and truckers about the severity of power loss and engine derates caused by DEF systems.
• Manufacturer Collaboration:The EPA developed this guidance in collaboration with manufacturers to provide clear direction on how to implement solutions for existing and new diesel equipment.
• Balancing Regulations:The EPA is continuing its efforts to reduce pollution from diesel engines while ensuring the reliable operation of these crucial pieces of machinery.

Me: It's a step in the right direction. I'm 100% for Clean Air and Water but sometimes......

 

[DarkBlack]

Yes, and in 4 years when Governor Newsome becomes President Newsome those pollution controls will come back, only be much harsher. (Enter your favorite tree-hugger's name here) Then what? Are we going to have to install DPF/DEF systems on all tractors, new and old, to be able to run them?

Don’t wish that kinda stupidness on us.
Future moron politician is going to emissions test your tractor , lawn mower, generator?
Test the GPM’s of your toilets
Check your faucets for aerators?
Your showers for water restrictors?
Your gas cans for vent caps?…etc….

 

[SatchmoIsBack]

Don’t wish that kinda stupidness on us.
Future moron politician is going to emissions test your tractor , lawn mower, generator?
Test the GPM’s of your toilets
Check your faucets for aerators?
Your showers for water restrictors?
Your gas cans for vent caps?…etc….

They would if they thought they could get away with it.

I want my old Gas Cans back. The new ones that are supposed to save us from ourselves end up leaking gas all over everything and do way more damage than the old vented gas cans.

AI again --

AI Overview

Yes, gas cans can have vents again as of July 2025, with the U.S. Environmental Protection Agency (EPA) clarifying that vents are allowed if they automatically close when not in use, a change made to improve fuel flow and usability

 

[JRH02]

Me: It's a step in the right direction. I'm 100% for Clean Air and Water but sometimes......

Yup. Hopefully none of us dump our oil or even tolerate a bad leak. But as far as I'm concerned there is way too little attention to blatant issues not/never addressed. Or misdirected policy like ethanol percentages (or MTBF bwahh-hahhh). There is so much that could be done but it doesn't make the greenies as happy because they are not the hot button issues of that day.

 

[walnutman]

Yup. Hopefully none of us dump our oil or even tolerate a bad leak. But as far as I'm concerned there is way too little attention to blatant issues not/never addressed. Or misdirected policy like ethanol percentages (or MTBF bwahh-hahhh). There is so much that could be done but it doesn't make the greenies as happy because they are not the hot button issues of that day.

Ethanol is a crime. The costs to produce it if you include all the farming costs... all using diesel, then transportation costs... more diesel, then the refining.... more energy consumption.... then transfer and blend.
And at the same time depleting farmland.
What a joke.

 

[Eagle1]

Ethanol is a crime. The costs to produce it if you include all the farming costs... all using diesel, then transportation costs... more diesel, then the refining.... more energy consumption.... then transfer and blend.
And at the same time depleting farmland.
What a joke.

Don't forget raising livestock feed prices by a lot.

 

[jyoutz]

Ethanol is a crime. The costs to produce it if you include all the farming costs... all using diesel, then transportation costs... more diesel, then the refining.... more energy consumption.... then transfer and blend.
And at the same time depleting farmland.
What a joke.

And it’s subsidized.

 

[JRH02]

And it’s subsidized.

Of course with our money. Did any of you vote for ethanol?

 

[newbury]

Of course with our money. Did any of you vote for ethanol?

The farmers that voted for ethanol probably think a JOHN DEERE 9R 440 is a small tractor.

 

[MMM2]

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?

Soon all that crap will disappear. Changes at the EPA. That is what you should be talking about. Wait a little longer till the dust settles.

 

[4x4moses]

Something to think about (which I haven't seen mentioned), is that some manufacturers have figured out how to avoid DPF in 25-75 HP machines. Mahindra and Massey Ferguson come to mind. My son-in-law's new John Deere 5075E has no DPF. For me, DPF has only caused one issue with my Kioti. That was operator error (my brother-in-law). Otherwise, it occurs automatically; or can be done manually. It's no big deal - except when it's happening automatically and I'm finished working! In which case, I just find something else to work the tractor a little longer.

 

[JoeTexan]

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’m really surprised I haven’t seen anyone talk about Mahindra Tractors on this thread, only 1 other.
I’ve owned three Mahindra Tractors and never had to worry about DEF. From my understanding, Mahindra has been able to recycle the exhaust and avoid, legally, the need for DEF up to 100 HP. I’m sure other manufacturers will catch up to the Mahindras one day but for now. The burned diesel smells a little different from the old days but not near as bad as after you run DEF. I have borrowed a friends Kubota and swore I’d never buy another tractor that had to regin!

 

[WM75Guy]

Something to think about (which I haven't seen mentioned), is that some manufacturers have figured out how to avoid DPF in 25-75 HP machines. Mahindra and Massey Ferguson come to mind. My son-in-law's new John Deere 5075E has no DPF. For me, DPF has only caused one issue with my Kioti. That was operator error (my brother-in-law). Otherwise, it occurs automatically; or can be done manually. It's no big deal - except when it's happening automatically and I'm finished working! In which case, I just find something else to work the tractor a little longer.

The New Holland and Case utility tractors up to 75 hp such as my Workmaster 75, not made by LS, uses DOC/EGR instead of a DPF. The smaller CUTs made by LS use DPF.

 

[JimR]

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.

Somehow Mahindra beat this on their mid-sized tractors when I bought my Kioti back in 2016. I looked at a 55hp Mahindra that didn’t have a DPF system on it like my 45hp Kioti did.

 

[downtheroad]

I have a BadBoy (Kukeje) 4025 and it is the same motor as the 4035 that has def. You can put a tune on the 25 to take it to 35. Same motor.

 

[ptsg]

Somehow Mahindra beat this on their mid-sized tractors when I bought my Kioti back in 2016. I looked at a 55hp Mahindra that didn’t have a DEF system on it like my 45hp Kioti did.

Neither have DEF. Only DPF for the Kioti and DOC for the Mahindra.

What Mahindra does is using a DOC. A DOC is more or less a DPF without a way to force a Regen. It relies solely on good engine loads to keep the exhaust temps high enough that it continuously burns the particles inside the DOC.

The issue with this system is that it can get clogged, really clogged if the engine is not ran hard enough. A good drive on the road in the highest gear every once in a while takes care of it though.

This was also how Branson did initially, when emissions came into play.

 

[JimR]

I understand a lot of this stuff is going away. The OBBB and the changes going on at EPA should end a lot of this stuff.

I just spent $5,000 on Emissions Equipment for my Ram Cummins Diesel. It breaks. Bigly. And when it does, it's expensive. Bigly.

For those of you that haven't experieced it, good. I hope you never do. But if you do -- Good luck.

My neighbor spent $6500 on his Ford F250 diesel emissions. He then traded the truck in on a gas job because the dealer said that this issue was going to happen again with it.