John Deere Announces Names, Ratings for Interim Tier IV/Stage III B Engines

Fri May 01, 2009 - National Edition
Construction Equipment Guide

John Deere Power Systems (JDPS) has announced a new naming convention and ratings for its Interim Tier IV/Stage III B engines. The names will capitalize on the PowerTech brand but add a three-letter suffix that designates the engine’s technology package. An example of the new names is the PowerTech PVX 6.8L. The new ratings for the John Deere Interim Tier IV/Stage III B lineup will apply to the five models in the 174 hp (130 kW) and above power class.

The three letters define the engine’s technology platform, turbocharger and exhaust filter. All of the John Deere Interim Tier IV/Stage III B engines with ratings 174 hp and above are designated “P,” indicating the Tier III/Stage III A PowerTech Plus technology platform that features 4-valve cylinder heads, cooled exhaust gas recirculation, full-authority electronic engine controls, high-pressure fuel systems and air-to-air aftercooling. These engines use either a variable geometry turbocharger (designated “V”) or series turbochargers (designated “S”), and they also feature an exhaust filter (designated “X”).

“The versatility of this naming convention enables us to use it for Interim Tier IV/Stage III B and future emissions regulations,” said Doug Laudick, manager of product planning.

The engine models and ratings 174 hp and above for the John Deere Interim Tier IV/Stage III B lineup include:

• PowerTech PVX 6.8L: 174 to 250 hp (130 to 187 kW)

• PowerTech PSX 6.8L: 225 to 250 hp (168 to 187 kW)

• PowerTech PVX 9.0L: 250 to 300 hp (187 to 224 kW)

• PowerTech PSX 9.0L: 300 to 425 hp (224 to 317 kW)

• PowerTech PSX 13.5L: 350 to 600 hp (261 to 448 kW)

The primary difference between the PowerTech PVX and PSX engine models is the variable geometry turbocharger (VGT) versus series turbochargers, consisting of a VGT and a fixed-geometry turbocharger. The 13.5L model is available only with series turbochargers. The PowerTech PVX engine models deliver similar power, transient response, peak torque and fuel economy as the Tier III/Stage III A engine models they replace. The same performance benefits are extended to the PowerTech PSX engine models, which also provide improved low-speed torque and enhanced high-altitude operation.

About John Deere Power Systems

John Deere Power Systems (JDPS) manufactures and markets 40 to 600 hp (30 to 448 kW) industrial diesel engines and 75 to 750 hp (56 to 559 kW) marine diesel engines, as well as drivetrain components for use in a variety of off-highway applications.

For more information, call 800/533-6446 or visit

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