8N Replacement

[tderrick]

Are you sure it's the pump?

Could be other issues.

Go to the N board for advise. I'm an expert on these systems but don't want to hijack this thread any more than already done.

If you do decide to rebuild yours, beware of aftermarket parts. I avoid aftermarket parts like the plague due to far too many bad experiences.

SDT

No, I'm not sure it's the pump.... I'll post the search / post the question on the N board...thx

 

[Fallon]

Does this mean the 2501 has no emission hardware on it?

Thx for the detailed info... it's a big help trying to make this decision... it's certainly between the 2501 and 3301

Correct. It's basically a tweaked L3200 (32hp). They played with the numbers to get it below the 25hp limit where you need emissions equipment. I hear they did a poor job often resulting I'm a more powerful machine than expected. It develops power at a lower RPM than the rest of the Ls.

It's a little low on power, but not to bad. A really good compromise for those wanting a bigger machine without emissions stuff.

 

[PaulL2]

If you're looking to avoid emissions equipment, and for your use, I'd be tempted to buy an older tractor rather than the L2501. They are a larger displacement motor that has been detuned, but I've seen no information on how to "retune" them to get the HP they're capable of. They're clearly a good tractor and you probably get a generous 25 HP, but it's still not going to be as many HP as you're used to.

 

[jeff9366]

Does this mean the 2501 has no emission hardware on it?

Thx for the detailed info... it's a big help trying to make this decision... it's certainly between the 2501 and 3301

Kubota L2501 meets Tier II emission standards. I do not know what is involved in meeting Tier II standards in 2018.
L2501 does not have a diesel particulate filter.

 

[majorwager]

The 2501 could not be sold as a new tractor in 2018 w/o meeting tier 4 final standards. Believe tier 2 diesel emission regulations could be met still employing mechanical fuel pump, but engine must be direct injection and operate on low sulfur (500 ppm) or ultra low sulfur (50 ppm) fuel.

My MX requires only low sulfur, however practically impossible to find diesel w/ sulfer content above the ultra level.

 

[Tractorable]

I’m considering replacing my 8N with a Kubota L3560 and when comparing the specs between the two, they’re almost identical dimensionally except for height and weight. Exact same length (115in), wheelbase (70in vs 71in), and width (64in with R1’s).

I often said to myself on the farm how much I appreciate the size of the 8N, not too big and not too small. I’d expect the L3560 to be 10x better though with the 4wd, twice the weight with the loader, and 10 extra diesel powered horses.

 

[jeff9366]

It is the 'Grand L' HST/PLUS transmission that will most impress you.

 

[PaulL2]

The 2501 could not be sold as a new tractor in 2018 w/o meeting tier 4 final standards.

Yes, it absolutely meets tier 4 final standards. But those standards require a different level of emissions for tractors over 25 horsepower. So yes, it's compliant with the standards, and no, it doesn't have the same emissions controls as the larger tractors (the 3301 for example). This can be seen at this link Emission Standards: USA: Nonroad Diesel Engines, in table 2 a bit over half way down the page. Tractors 11-25 HP can emit 6.6 grams of CO per kWh, where tractors 25-50 HP can emit 5.5. For nitrogen oxide, 11-25HP can emit 7.5 g/kWh, 25-50HP only 4.7g/kWh. Particulates look to be the biggest difference, 11-25HP can have .3g/kWh, 25-50HP must be 0.03 g/kWh, so ten times less.

Bottom line is that a tractor in the 11-25HP class generally doesn't need a DPF to meet Tier 4, and a tractor in the 25+class generally does.

So, you need to either buy a tractor 25HP or less, or buy a tractor 25-50HP with a build date before 2013-ish.

In a perfect world you'd be able to buy an L2501 and then do some aftermarket tuning to produce more power. Presumably that's illegal or discouraged though.

 

[jeff9366]

Kubota L2501 meets Tier II emission standards. I do not know what is involved in meeting Tier II standards in 2018.
L2501 does not have a diesel particulate filter.

Tier 3 standards phased-in from 2006 to 2008 (Tier 3 standards applied only for engines from 37-560 kW).

Very stringent Tier 4 emission standards, phased-in from 2008 through 2015, require substantial reductions of Particulate Matter above 19 kW power output.


Every tractor brand includes a model in the 2,600 pound to 2,900 pound (bare tractor) range with 100 cubic inch/24 horsepower engine. Tractors under 19 kW ( 19 KW = 25.4794-horsepower) are presently exempt from stringent Tier IV emission controls which abruptly increase a tractor's cost some $2,000 above the 19 kW power demarcation.

In kubota's product line this is the model L2501, which meets Tier II emission standards.

Neither Tier III nor Tier IV emission standards apply to engines producing under 19 kw engine power output.

 

[PaulL2]

Neither Tier III nor Tier IV emission standards apply to engines producing under 19kw engine power output.

Per my link above, I think strictly speaking Tier IV emission standards do apply to engines producing under 19kw (25hp), but they require mostly the same level of emissions as Tier II did - i.e. they didn't tighten the requirements for tractors under 19kw as much in Tier IV as they did for all tractors above 19kw. The CO and NOx levels requirements are the same in Tier II and IV for <19kw, the particulates reduced from 0.8 to 0.4, but not to anywhere near the 0.03 needed above 19kw.

I think this is what leads to endless discussions about Tier IV v's Tier II, and people talking at cross purposes. Technically the L2501 is subject to Tier IV, and complies with Tier IV. But the requirements of Tier IV are way less for a tractor under 19kw.