Tier 4 emissions on 2014 kubota 4060

i just picked up an M8560.....just tier III emissions but the dealer did tell me that the DPF is coming on these machines in the fall.....first region at 13 hours....

Hi Cal, I agree with your ideas and sent an email to my dealer last night that Kubota should be more proactive regarding the recalls, and should extend the warranty on the engines beyond the first two years free of charge. Their own technical support could not answer my questions about optimal rpm's beyond quoting me the manual (actually incorrectly).

Has your recall kit been installed yet?

sheepfarmer said:

Hi Cal, I agree with your ideas and sent an email to my dealer last night that Kubota should be more proactive regarding the recalls, and should extend the warranty on the engines beyond the first two years free of charge. Their own technical support could not answer my questions about optimal rpm's beyond quoting me the manual (actually incorrectly).

Has your recall kit been installed yet?

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what is said recall kit?

also, am I to understand that these have only a DPF and do not run DEF? I thought the final Tier 4 emissions was DEF.

I see no real purpose as to why agricultural equipment is subjected to something that causes an immense amount of heat and could very likely cause a fire in many places due to dry brush.

virginiavenom said:

what is said recall kit?

also, am I to understand that these have only a DPF and do not run DEF? I thought the final Tier 4 emissions was DEF.

I see no real purpose as to why agricultural equipment is subjected to something that causes an immense amount of heat and could very likely cause a fire in many places due to dry brush.

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The recall kits for some models consists of a change in structure of the breather and the oil separator, and covering of these parts with insulation. It is to solve some kind of freezing problem.

I think the post above meant DEF coming on some tractors this fall.

Cal270 said:

Just a quick update on how running a series 60 tractor at higher rpm's affects the particulate filter.
Started tractor this am with 83% on PM screen, 20 minutes of warming up it was at 87%. Drove tractor in high gear 5 miles, spent 2 hours clearing snow at my local rifle range I belong too & drove home. Ran rpm's at 2200-2300.
PM screen went down to 52% by the time I got home.
Outside temp was 15F.
I think the bottom line is that Tier 4 tractors need to be ran at higher rpm's to operate efficiently.
The rpm's ran today were still 300-400 below WOT.

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I have a 7060. How do you make it show the % on the screen?

Catchad81 said:

I have a 7060. How do you make it show the % on the screen?

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On the 3560 there is a button to the left of the steering wheel labeled "display mode". If you push it briefly and repeatedly it will scroll through 4 or 5 screens, one of which shows a bar graph and a % for the dpf. These should be short presses. If you hold it down, it will allow you to select/change things on that particular display. See your manual, it is kind of complicated without the pictures.

virginiavenom said:

what is said recall kit?

also, am I to understand that these have only a DPF and do not run DEF? I thought the final Tier 4 emissions was DEF.

I see no real purpose as to why agricultural equipment is subjected to something that causes an immense amount of heat and could very likely cause a fire in many places due to dry brush.

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DPF and DEF are used for two different results in altering diesel engine exhaust emissions. DPF is an exhaust filter that removes and collects soot. The regeneration cycle is necessary to burn off the collected soot. Regeneration is accomplished in two ways, active and passive. Active regeneration occurs when the additional fuel is added to the exhaust stream to increase the exhaust temperature to burn off the soot. Passive regeneration occurs when the engine is run above a certain RPM under adequate load to increase the exhaust temperature to effectively burn off the collected soot in the DPF.

Tier 4 engines can use either Exhaust Gas Recirculation (EGR) to reduce NOx or DEF to reduce NOx. DEF is injected inside a hot catalytic converter to convert NOx to nitrogen and water vapor. EGR injects a small amount of exhaust gas into the engine intake to reduce the combustion temperature which lowers the amount of NOx emitted. Some diesel engines utilize cooled EGR to further reduce NOx.

In summary, DPF and DEF are two separate emission devices and not necessarily both are required. A few diesel engines can meet the NOx requirements without the use of either EGR or using DEF.

With my L5460 Tier 4 tractor with a horizontal exhaust system, the end of the tailpipe has a venturi on it which adds cooler ambient air to the exhaust stream and is designed eliminate any potential of starting fires in dry grass. Tractors with vertical exhaust systems don't need this device since the exhaust stream is away from dry grass. I've used my tractor mowing dry pasture grass as well in hay meadows running along windrows of dry hay while the engine is undergoing a regeneration cycle without causing a fire. From my experience, DPF causing fires in just another internet myth.

Bill

Cal270
Thank you for the detailed observations. I am expecting delivery on a L4060 soon and your experience is a huge help in setting expectations about usage RPM and regen.

One problem with the tier 4 technology is that most tractor manufacturers have their own system. There isn't one proven technology yet. Most patent their system so we just have to wait and see which one is the winner. We "the user" are part of their research and development department... Problems, annoyances and added cost of a new tractor aside, I just wonder what these systems will cost to fix down the road...

Greenhead said:

One problem with the tier 4 technology is that most tractor manufacturers have their own system. There isn't one proven technology yet. Most patent their system so we just have to wait and see which one is the winner. We "the user" are part of their research and development department... Problems, annoyances and added cost of a new tractor aside, I just wonder what these systems will cost to fix down the road...

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What? The 'technology' has been around long enough I can buy DEF from the pump at a station.

nickelplated5s said:

What? The 'technology' has been around long enough I can buy DEF from the pump at a station.

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I have yet to see DEF sold at any gas station where I live (South Carolina). You can buy it by the gallon at almost any store but I've never seen it sold at the pump.

nickelplated5s said:

What? The 'technology' has been around long enough I can buy DEF from the pump at a station.

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The tractor systems don't all use DEF. Each system is unique to the individual companies. Not all will be good. Speaking broadly, not just Kubota focused, anytime you put new technology parts on a older engine not designed for it, there always will be problems...

Yep, DEF at the pump at some of the newer stations around here.

I find it interesting the number of different strategies Kubota has used and is planning. DEF, DPF filters, turbo and turbointercooled, and computer controlled injection that gives more than one fuel injection per stroke, etc. (not all in the same tractor). Re-design of glow plug chamber in some.

The good news is almost all of them are in trucks, and so some of the bugs MAY be worked out. As far as putting the add-ons on old platforms, if what you mean old engine designs, that isn't what they did in most tractors. They are really different engines and injection systems too. That said, what will happen after the 5yr warranty runs out is anybody's guess.