Why do you say the Tier IV emission controls are mandatory?
During 1998 offroad engine regulations reducing emissions were structured as a 3-tiered progression. Offroad regulations use the metric system of units, with regulatory limits expressed in grams of pollutant per kWh. Examples of regulated applications include farm tractors, excavators, bulldozers, wheel loaders, backhoe loaders, road graders, diesel lawn tractors, logging equipment, portable generators, skid steer loaders and forklifts.
Each tier involved a phase-in (by engine power) over several years.
Tier 1 standards phased-in from 1996 to 2000.
Tier 2 standards phased-in from 2001 to 2006.
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.
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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.
L3301 and
L2501 are essentially the same tractor.
L3301 has increased power and mandatory Tier IV emission controls.
