Final Tier 4/Stage IV

Last March John Deere announced that they had created a new Tier 4/Stage IV engine to comply with EPA regulations. First of all, what is a Tier 4 engine? Basically it is an engine that is above 75 horsepower.  The new EPA codes dictate an 80% reduction in nitrogen oxides. Nitrogen oxides are very harmful to the environment and destroy the ozone layer. Selective catalytic converters will be used to help control emissions. A diesel exhaust fluid injector will be required to meet the EPA's rules.Agriculture should not notice any difference in the engine except that is it much safer for the environment.

Check out the video: John Deere Tier 4