Engine DOC/DPF for Interim Tier 4/Stage III B

John Deere Power Systems will use a diesel oxidation catalyst (DOC)/diesel particulate filter (DPF) and (EGR) for NOx control.

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To meet Tier 4 Interim/Stage III B mobile off-highway emissions regulations for engines 174 hp and above, John Deere Power Systems will use its Tier 3 PowerTech Plus engine platform and add a diesel oxidation catalyst (DOC)/diesel particulate filter (DPF) unit for reducing particulates as well as increase the percentage of cooled exhaust gas recirculation (EGR) for NOx control.

  • Engines 174 hp and above include the 6.8L, 9.0L and 13.5L in-line
  • For Interim Tier 4, cylinder head, fuel system, EGR, VGT and air-to-air aftercooling systems will be updated
  • Engine control unit (ECU) will change to provide twice the RAM, double the processing speed and four times the program memory of the previous version to handle added sensor and control logic
  • Six ratings from the John Deere PowerTech M and PowerTech E engine lineups already meet Tier 4 Interim and Stage III A emissions requirements
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