Comparison New Tractor Emissions Technologies

[MaineGuy1]

I have the Massey Ferguson 4707. It uses a pass through DOC, designed to last the life of the tractor with no service. I do 80% loader work at 1200 rpm. Never had a minutes problem with it. Its designed to never plug as it's a pass through, similar to a catalytic converter. Massey Ferguson hit a home run with this setup.

I have the Massey 1735M with Shibaura engine with DOC. My dealer said to run it as normal and not worry about high rpm's if I don't need them. I need to re-read the owners manual to see what it says. I don't have many hours, maybe 65, but it runs great. I'm glad I don't have to deal with the Regens. Some of my buddies that have Regens have had problems. Others have been fine though.

 

[ericm979]

I think with most of them if you run them hard enough, often enough, that's all they need. I let mine idle while I'm changing implements or getting off for few minutes. Sometimes I operate it below the green zone on the tach. But I also run it at full rpm when running the chipper, and often with the chipper it's using all the power it's got. It's been fine.

 

[kenmac]

some 2013 models have no emissions. That's why I bought a 200 hr 2013 MX5100. I was looking at a 2013 6070 but they had already put emissions on that model

So, if looking at used you would have to get a 2012 I believe in any size to be emissions free.

I recently bought a McCormick CX105. I had to wait a while till the dealer got a trade in model without emissions, as many are keeping their emissions free tractors instead of trading them in.

If I were buying new, I would look hard at Branson due to the customer being able to remove emissions without any ill effects

 

[ericm979]

There have been off road diesel emissions standards since 1998. Tiers 1-3 were able to be met with engine design- things like combustion chamber shape and injection timing. Tier 4 under 25hp can still be met with engine design.

This is a good explanation and summary: Emission Standards: USA: Nonroad Diesel Engines

 

[jeff9366]

Tractors between 25.5 and 75hp use DOC, DPF, or both. Some of those don't have discrete regens but do some form of low temp continual regen. I think Mahindra uses a DOC. Branson uses a DOC+DPF with no discrete regens. Some Kubotas with regens also have a DOC+DPF.

Kubota, Kioti, John Deere, New Holland, Case and many other manufacturers use a two stage diesel emissions process for tractors in 26hp to 75hp, which includes a 1st stage DOC + 2nd stage DPF. The first stage DOC removes only incompletely burned gases and passes Diesel particulates to the DPF cannister for burning and elimination during regeneration by using a spray of diesel fuel to encourage the burn. For tractors over 75hp, the two stage emissions process adds the messy DEF for removal of additional unwanted gases. Occasionally, the DPF cannister can become plugged, most commonly by failure of the operator to maintain high RPM during tractor operations. When the DPF filter is plugged, it requires dealer assistance.

Bad information within these posts indicated with bold font.

 

[ruffdog]

I think with most of them if you run them hard enough, often enough, that's all they need. I let mine idle while I'm changing implements or getting off for few minutes. Sometimes I operate it below the green zone on the tach. But I also run it at full rpm when running the chipper, and often with the chipper it's using all the power it's got. It's been fine.

^^agree. It's when they are run at low speed while puttering around is when most people are having issues.

 

[jaydee325]

There have been off road diesel emissions standards since 1998. Tiers 1-3 were able to be met with engine design- things like combustion chamber shape and injection timing. Tier 4 under 25hp can still be met with engine design.

This is a good explanation and summary: Emission Standards: USA: Nonroad Diesel Engines

It was much before that for implementation of diesel emissions equipment. In 1980, I was a heavy equipment tech at a Fiat Allis dealership. In 1980, the front end loaders shipped with a retarder attached to the throttle linkage. This slowed the movement of the throttle linkage to reduce the black smoke when the operator stepped on the throttle. The operators hated the slow throttle response!!

When the first loader showed up at the dealer, our service manager made it a point to make sure we all knew what the retarder was for and that we were under no circumstances to disable it. We were also told we could point out to the owner how HE could disable it, which was fairly simple.

 

[kenmac]

^^agree. It's when they are run at low speed while puttering around is when most people are having issues.

probably so, But in real world conditions, Many (that I know) don't run wide open from the time they start the tractor until it's turned off.
If you are grading the drive , spreading dirt, etc, It doesn't require one to run @2500RPM. In fact, it would be difficult to get a smooth grad running at 2500 RPM the entire time

When I'm grading, or spreading dirt, gravel, etc,. I run about 1700 RPM so as not screw up the grade when going over humps and bumps

 

[kenmac]

There have been off road diesel emissions standards since 1998. [/url]

Heck, there may have been some emissions before then. I remember gasoline engines having some emissions back in the 70's, but not near what they are today

I think when someone speaks of emissions, they aren't speaking of light emissions like there were back then.

Those emissions back then, were nothing compared to today's emissions, that most are speaking of when they use the word emissions today

 

[todd92]

Having just had so far unsolved DPF problems on a Kioti, I vowed to find a new tractor without DPF. In the 26-75 HP range there are only 3 I could find. MF, Mahindra and Case/NH Farmall Utility (not compact, which are LS made). Going through the terrible Kioti dealer/corporate support, I would rule out Mahindra for the same reason. When it came to the Kioti NX5510, the close second was the MF1760, but I couldn't justify the price delta...if I only knew.

Keep in mind the DPF is just a simple filter, if it's plugging up it's because there is another problem upstream, either running rich or an intake or oil leak. ALL tractors with or without DPF have DOC. While there such a thing a DOC 'face plugging', 99.9% of diesel emission problems are DPF related.

Now happily driving a Case Farmall 75A, which is an entire new level of size and power above a compact. So far very happy.