John Deere Power Systems Tier 4-Final off-road diesel engines will carry the PowerTech brand and include a three-letter suffix that specifies the engine’s technology package. The three letters will identify the engine’s technology platform, turbocharger and aftertreatment, respectively.
Engines with power ratings 75 horsepower and above are designated “P,” indicating the Tier 3 PowerTech Plus technology platform that features 4-valve cylinder heads, cooled exhaust gas recirculation, full-authority electronic controls, high-pressure fuel systems and air-to-air aftercooling.
These engines utilize a variable geometry turbocharger (designated “V”), series turbochargers (“S”), or a wastegate turbocharger (“W”).
Aftertreatment technology for engines 75 horsepower and up above includes an exhaust filter and selective catalytic reduction—a combination that is designated “S.”
Engines with power ratings less than 75 horsepower are designated “E” to indicate the PowerTech E technology platform that includes 2-valve cylinder heads, full-authority electronic controls, high-pressure common-rail fuel system and air-to-air aftercooling.
These engines utilize a wastegate turbocharger (designated “W”) and an exhaust filter (“X”).
John Deere Tier 4-Final Engine Models
• PowerTech EWX 2.9L: 50 - 74 hp
• PowerTech EWX 4.5L: 74 hp
• PowerTech PWS 4.5L: 85 - 140 hp
• PowerTech PSS 4.5L: 125 - 173 hp
• PowerTech PVS 6.8L: 140 – 250 hp
• PowerTech PSS 6.8L: 225 - hp
• PowerTech PSS 9.0L: 250 - 425 hp
• PowerTech PSS 13.5L: 400 - 600 hp