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Deere Diesels 174 hp+ Get EPA, EU, CARB Approval

Posted on July 17, 2013

John Deere Power Systems (JDPS) has announced that the company’s engine lineup 174 hp (130 kW) and above has received U.S. Environmental Protection Agency (EPA) Tier 4 final, European Union (EU) Stage 4 and California Air Resources Board (CARB) emissions certification.

The PowerTech  PVS 6.8L, PowerTech PSS 6.8L, PowerTech PSS 9.0L and PowerTech PSS 13.5L models are the first John Deere off-highway engines to receive  Tier 4 final, Stage 4 and CARB emissions certification in the 174 hp to 750 hp (130 kW to 560 kW) range. 

Tier 4 final/Stage 4 emissions regulations begin January 1, 2014, for engines 174 hp and above, and require an 80 percent reduction in nitrogen oxides (NOx) from previous  Tier 4 interim/Stage 3b requirements. Particulate matter (PM) levels remain the same as those mandated by Tier 4 interim/Stage 3b regulations.

For Tier 4 final/Stage 4, Deere said it continued with its building-block approach by developing the Integrated Emissions Control system to meet the standards. For 125 hp (93 kW) and above, JDPS will offer models equipped with an Integrated Emissions Control system configured with cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC) and diesel particulate filter (DPF), as well as an selective catalytic reduction (SCR) system. The DOC/DPF reduces PM while cooled EGR and the SCR system reduce NOx.

With the use of SCR technology for Tier 4 final/Stage 4 engines, JDPS is talking about total fluid economy taking into account both diesel fuel and diesel exhaust fluid (DEF). JDPS said DEF consumption with its Tier 4 final/Stage 4 engines will be 1 to 3% of diesel fuel consumption depending on the application.  

With diesel fuel economy gains achieved through increased injection pressures and the optimized Integrated Emissions Control system, JDPS said Tier 4 final/Stage 4 engines are expected to improve upon the total fluid economy of Tier 4 interim/Stage 3b engines. The company added that low DEF consumption can also mean the use of a smaller DEF tank size, minimizing the space required on equipment. Other benefits  include less on-site bulk storage requirements for customers and extended DEF filter service intervals.

 Models and power ratings for the certified Final Tier 4/Stage IV engine lineup 174 hp (130 kW) and above include:  PowerTech PVS 6.8L rated 185 hp to 250 hp (138 kW to 187 kW); the PowerTech PSS 6.8L will be rated 225 hp to 300 hp (168 kW to 224 kW); the PowerTech PSS 9.0L will have ratings from 250 hp to 425 hp (187 kW to 317 kW); and the PowerTech PSS 13.5L from 414 hp to 600 hp (309 kW to 448 kW).