2019 L6060 Regens

[MHarryE]

Today I watched my L6060 as I roared it from my farm to one of our other farms. Full rpm, pedal down completely and in cruise, DPF started out at home at 36%, arrived at other farm at 29%. Later had a spraying job for a local farmer, M7-171, same type of roaring. 82% at start, 85% on arrival with no droppage. Don’t often road that far but to this custom job, discovered fuel usage on the M7-171 is 5 mpg at 33 mph.

 

[Hilbilly]

Ran mine from my daughters place to ours at about 2400rpm in High range, rabbit. The first km is flat then the next 1.5km ranges from 15% to 10% uphill grade. I ran that in high range too. The steepest parts I dropped it to High turtle but I was very impressed with the power this tractor has compared to the Massey 1549, I traded in on it. The dpf level only dropped by 1 % during that run but I can see if the tractor gets worked the dpf levels would likely drop as yours did running full out. I still haven't done that but will soon.

 

[5030]

Look at it this way. You have about 2100 regens before the canister will have to be renewed or cleaned and your unit will tell you when it's loaded with burned soot as in it won't run at full power. Called 'derating'. Time to go to the dealer and have a new canister installed or the old one cleaned. Typical cost for a cleaning is about 300 bucks and it it's not cleanable, a new one is about 500 bucks. Price of doing business with the EPA.

Don't matter what the brand is, if it's a non DPF Tier 4 final engine, it has a a canister and some DPF engines have the canister as well.

 

[5030]

Today I watched my L6060 as I roared it from my farm to one of our other farms. Full rpm, pedal down completely and in cruise, DPF started out at home at 36%, arrived at other farm at 29%. Later had a spraying job for a local farmer, M7-171, same type of roaring. 82% at start, 85% on arrival with no droppage. Don’t often road that far but to this custom job, discovered fuel usage on the M7-171 is 5 mpg at 33 mph.

One thing about a regen cycle... You could grill burgers on the one box if you want to... Just make sure the meat isn't fatty. Fatty meat makes a mess on the stainless.

Everytime I read about this stuff I just smile and keep running my pre tier 4 tractors. I'm not green and don'e want to be 'forced by mndate' to be that way.

 

[Hilbilly]

I've decided to just ignore the whole DPF thing and use this tractor the same way I have always used them. If that involves idling then that is what it will do. It makes no sense to me to keep shutting the tractor off every time I stop to do something and then restarting it or revving the crap out of it just to keep the DPF filter cleaner and reduce regens. When it wants to regen I will let it do its thing. I just need to be aware of when it wants to regen. I think this is different for many users. If I were a farmer and using the tractor for extended hours then the regens would likely happen without me being aware of most of them. But I'm not even a hobby farmer. My tractor just gets used for small jobs and short periods of time, except in the winter and that is the main reason for having one. I can spend anywhere from 1 hour to 6 hours a day plowing, blowing and moving snow, depending on how much we get in a day and how much has already accumulated. It sure is going to be nice spending that time wearing a T shirt in a warm cab and the regens will only make more heat.

 

[MessickFarmEqu]

way too much time is spent worrying about this stuff. Keep your throttle over 50% and go to work.

 

[5030]

way too much time is spent worrying about this stuff. Keep your throttle over 50% and go to work.

Leave it to Neil to cut to the chase.......

Don't worry about it, don't dwell on it, just run it. You have at least 2100 'regen' cycles to get to a 'full canister' condition and that means way more hours that you will probably ever accrue on your machine anyway (if hours run are an indication of usage on this forum).

Neil... Bought a Sidekick from my local dealer. What a hoot. Nice RTV.

 

[Hilbilly]

way too much time is spent worrying about this stuff. Keep your throttle over 50% and go to work.

Thanks and good to know about the throttle setting. On the Massey I just traded in the owners manual suggested keeping the RPM's above 1700 because it was better for the HST transmission. The Kubota owners manual makes no reference to minimum suggested operating rpm's. So I've been running it at idle, with the "auto throttle advance" engaged. Time to change the way I run it.

 

[jeff9366]

I have not read the effect a turbo-charger has on emissions, Tier IV emission control bits and time between regenerations.

Some respondents have turbo engines, some do not.

 

[Grateful11]

Our son's L4060 must be doing pretty good. His first regen happened while he was loading round bales onto a trailer in the field at about 35 hours. He was loading bales again Thursday and there were 4 bales that wouldn't fit on the trailer so he went and grabbed two at a time and brought them to the farm and he said the DPF dropped 10% as it was a two mile round trip on the road. I think he said it's at 50% with 49 hours on it.

 

[5030]

Like I stated, according to my Kubota dealer (the owner), he told me the cannister was good for 2100-2300 regens before it needed cleaning or replacement. While not a concern with me because both my M's are Tier 4 interim which basically means no pollution hardware at all, 2100 regens at say 15 hour intervals equals 31,500 run time hours and the motor isn't going to last that long anyway and if it did, you won't own it anyway.

I used the 2100 figure and it's the low side.

My 2004 M9 has 3600 run time hours on it and I farm with it so no way anyone has to be concerned with regens. I suspect the emissions hardware will fail long before the cannister gets loaded with soot.

 

[5030]

I have not read the effect a turbo-charger has on emissions, Tier IV emission control bits and time between regenerations.

Some respondents have turbo engines, some do not.

None. Turbocharging only impacts pre combustion air. Emissions hardware is on the exhaust side, not the intake side.

 

[ptsg]

None. Turbocharging only impacts pre combustion air. Emissions hardware is on the exhaust side, not the intake side.

Doesn't turbos increase the EGTs? Therefore causing a cleaner burn of the exhaust gases? Which would help on the emissions system as is won't plug so much as with natural aspirated engines.

 

[Fallon]

Doesn't turbos increase the EGTs? Therefore causing a cleaner burn of the exhaust gases? Which would help on the emissions system as is won't plug so much as with natural aspirated engines.

A turbo has a compressor wheel on the intake side of things & the power wheel on the exhaust side. So it does mess with both streams. When you compress gasses, they heat up. This generally isnt advantageous for engines, son sn intercooler is used to cool the compressed gasses back towards ambient. In general the more air you can cram into a cylinder the more fuel you can add. The more air/fuel in a given volume you have the more energy comes out. Some as heat.

 

[Hilbilly]

I've already had 3 regens and am 50% towards the next one, at 62 hrs.

Don't turbos ramp up as the load increases? My diesel truck has a boost gauge and I can see the boost increase when I work the engine. So if you are working the engine there would be more boost and more heat, which in theory should reduce the regens. My tractor does very little hard work, which ,Ishtar explain why mine regens more often. One thing I did notice was that each regen so far has been longer than the one before it.

 

[5030]

I've already had 3 regens and am 50% towards the next one, at 62 hrs.

Don't turbos ramp up as the load increases? My diesel truck has a boost gauge and I can see the boost increase when I work the engine. So if you are working the engine there would be more boost and more heat, which in theory should reduce the regens. My tractor does very little hard work, which ,Ishtar explain why mine regens more often. One thing I did notice was that each regen so far has been longer than the one before it.

3 down and 2197 to go.

 

[MHarryE]

Heat during regen - my larger tractors will display the DPF temp. Hard work vs regen temp may add 100 degrees F, raising it from 1000 to 1100 degrees. I had a L5740 that I traded for my L6060. The 2 things most noticeable are improved fuel economy and lack f diesel exhaust odor. Oh, yeah, my L6060 has never set off the smoke alarm system in my home like the L5740. That’s the nuisance effect of having 9 smoke detectors wired together as a system. So regen heat is an issue inside a building because it’s not normal to be running at a power level that would generate so much heat. Regen uses more fuel at low power because of need to heat the DPF from say 600 degrees to 1100 degrees while at full load it might be only from 1000 to 1100 (based on numbers from my tractors). In the case of a L5740 vs a L6060, the old model uses an outdated IDI fuel system while the L6060 uses a very high pressure common rail system that according to Kubota’s charts is significantly more efficient. I assume that’s the reason I use so much less fuel doing the same work. With a few thousand hours now running DPF equipped tractors, I do not understand the issues. I do have 4 non-DPF machines that are no more reliable.

 

[Grumpycat]

A turbocharger, throttle, and EGR are necessary for controlling combustion on modern smogged diesels. Yes, a throttle on a diesel, but it is not under user control. All these are used to keep combustion within necessary ranges to minimize NOx and minimize soot the DPF will have to deal with.

DEF and SCR are required of higher HP to brute force deal with NOx. Oxides of nitrogen are a product of high pressure high temperature combustion. NOx kept gasoline automobile engine compression ratios low in the 1980's until means was found to control.

If anything a turbocharger lowers temperature of exhaust entering DPF. Simple thermodynamics: turbocharger takes energy out of the exhaust to pressurize the intake, therefore the exhaust temperature drops. That is bad for DPF as it needs heat to burn itself clean.

Is not clear to me in tractor applications whether raw fuel is dumped in the exhaust to regenerate the DPF? If not then what really happens when one presses the "Regenerate" button?

The safe way to provide raw fuel to the DPF is with a dedicated injector in the exhaust manifold. Common cheap way to do it is with ECU controlled direct injection squirting in the combustion chamber during an exhaust cycle. Sounds like a brilliant simple solution but too often washes the cylinder walls of lubrication and dilutes engine oil with fuel.

Road vehicles regenerate DPF on the run. Seems off-road should be able to do the same.

 

[deserteagle71]

Road vehicles regenerate DPF on the run. Seems off-road should be able to do the same.

They do. I have never "pushed a button" to do a regeneration on my Kubota. It is all automatic. The only way I know it is happening is when the regen light comes on in the dash. It is completely hands-off. There is nothing I have to do except keep working the tractor...and I don't notice any difference in the way it operates while the regen process is going on.

 

[BRMyers]

They do. I have never "pushed a button" to do a regeneration on my Kubota. It is all automatic. The only way I know it is happening is when the regen light comes on in the dash. It is completely hands-off. There is nothing I have to do except keep working the tractor...and I don't notice any difference in the way it operates while the regen process is going on.

Yep, my regen process occurred while I was moving brush. I had to bump up the RPMs slightly and just kept right on working.