New Marine Engines
John Deere Debuts Tier 3
John Deere Power Systems (JDPS) announced new Marine Tier 3 PowerTechTM 4.5L and 6.8L propulsion and generator-drive engines. John Deere will meet U.S. EPA Marine Tier 3 emissions regulations that began to take effect in 2009 based on cylinder displacement and power per displacement with a complete lineup of PowerTech 4.5L and 6.8L propulsion and generator-drive engines. They also will achieve compliance with IMO Tier II emissions regulations and EU 97/68/EC.
New EPA Marine Tier 3 regulations will impact John Deere 4.5L and 6.8L engines beginning January 1, 2013. Tier 3 regulations affecting John Deere 9.0L and 13.5L marine engines start in 2014.
John Deere is adding two new 4.5L models to its lineup of Tier 3 marine engines: the PowerTech 4045TFM85 generator-drive engine and the PowerTech 4045AFM85 propulsion and generator-drive engine. The PowerTech 4045TFM85 generator-drive engine is designed for quiet and smooth operation for genset applications. Features will include a high-pressure common-rail fuel system, two valves per cylinder, and the choice of keel cooled or integrated heat exchanger options.
The PowerTech 4045AFM85 will serve as a choice in the power range that was previously covered for Tier 2 by the PowerTech 6.8L 6068TFM75 propulsion and PowerTech 6.8L 6068TFM76 generator-drive engines. The PowerTech 4045AFM85 engine will feature a common-rail fuel system, four valves per cylinder, turbocharging and air-to-coolant aftercooling. It will be available with keel cooled or integrated heat exchanger options.
Propulsion power ratings for this engine include:
• PowerTech 4045AFM85 propulsion engine: 119 kW to 168 kW (160 hp to 225 hp)
Generator-drive 4.5L engine prime power ratings include:
• PowerTech 4045TFM85: 74 kW (99 hp) at 60 Hz (1800 rpm) and 61 kW (82 hp) at 50 Hz (1500 rpm).
• PowerTech 4045AFM85 generator-drive engine: 110 kW (148 hp) at 60 Hz (1800 rpm) and 89 kW (119 hp) at 50 Hz (1500 rpm).
John Deere 6.8L Tier 3 propulsion and generator-drive engines include the PowerTech 6068AFM85 and the PowerTech 6068SFM85 models, and will cover the power range previously covered by the PowerTech 6081AFM75 propulsion and generator- drive engine. The PowerTech 6068AFM85 and PowerTech 6068SFM85 engines will feature high-pressure common-rail fuel systems, four valves per cylinder and low-temperature aftercoolers. The 6068AFM85 model will be available with keel cooled or integrated heat exchanger options. The 6068SFM85 engine will be offered with an integrated heat exchanger configuration.
Propulsion power ratings for these engines include:
• PowerTech 6068AFM85: 172 kW to 246 kW (230 hp to 330 hp)
• PowerTech 6068SFM85: 186 kW to 298 kW (249 hp to 400 hp)
Generator-drive 6.8L engine prime power ratings include:
• PowerTech 6068AFM85: 166 kW (223 hp) at 60 Hz (1800 rpm) and 139 kW
(186 hp) at 50 Hz (1500 rpm)
• PowerTech 6068SFM85: 195 kW (262 hp) at 60 Hz (1800 rpm) and 168 kW (226 hp) at 50 Hz (1500 rpm)
(As published in the January 2013 edition of Maritime Reporter- www.marinelink.com)