John Deere Power Systems' new PowerTech Plus 9.0L diesel engine, which is Tier 3/Stage IIIA-compliant, replaces the company's PowerTech 8.1-liter engine and delivers, says the company, improvements in peak power, peak torque, low-speed torque levels, transient response and cold-weather starting. PowerTech Plus technology encompasses cooled exhaust gas recirculation, variable-geometry turbochargers and "state-of-the art" electronic control. The manufacturer claims significant increases in fuel economy for the new 9.0-liter engine, compared to its Tier 2/Stage II-compliant 8.1-liter predecessor.
