These articles and videos will help you learn more about how agricultural equipment manufacturers are meeting Interim Tier 4 regulations.


Meeting Interim Tier 4 rules

Here's a look at how agricultural equipment manufacturers plan to meet EPA's Interim Tier 4 rules for exhaust emissions from farm tractors and other off-highway diesel engines.


How John Deere will meet Tier 4 Interim tractor engine emission rules

In this video, Doug Laudick, John Deere manager of product planning, explains how the company will meet the new Interim Tier 4 EPA emission standards for tractor and combine engines.


John Deere reveals plans for Tier 4 tractor engines


Tier 4  engine update from AGCO

AGCO chose the Selective Catalytic Reduction (SCR) technology for Tier 4 engines in its ag equipment. Tier 4 will be phased in starting in 2011, according to Andrew Holtz, AGCO engineer.


Tier 4 solutions

Justin Sample, Cummins, explains solutions used by engine and tractor manufacturers to meet EPA standards.


Reinventing the engine

The two main solutions for cutting off-road diesel engine emissions are selective catalytic reduction (SRC) and exhaust gas recirculation (EGR). Here is how each system works and what it will add to the price of a tractor.


Next-generation engines

John Deere’s Tier 4 engine will use a diesel oxidation catalyst (DOC)/diesel particulate filter (DPF) to reduce particulates and an Exhaust Gas Recirculation (EGR) system to reduce the oxides of nitrogen.