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the cost of diesel fuel plus the additional cost for diesel
exhaust fluid, Deere said.
John Deere said it was one of the first engine manufacturers to achieve EPA and EU Tier 4 interim/Stage 3b
certifications for its entire lineup of engines above 174
hp. Engine models in this power range include the 6. 8,
9.0 and 13. 5 L engines. For Tier 4 interim/Stage 3b, the
cylinder head, fuel system, cooled EGR, VGT and air-to-air aftercooling systems were updated, but are similar to
Tier 3/Stage 3a configurations. All of John Deere’s certified Tier 4 interim/Stage 3b engines above 174 hp are in
production and available.
As with earlier tiers and other Tier 4 interim/Stage
3b models, John Deere is targeting the start of limited
production for engines 75 to 174 hp to be seven to nine
months ahead of the January 2012 regulation date.
Engine models in this power range include the 4. 5 and 6. 8
L diesels. The engines feature cooled EGR, full-authority
electronic controls, a four-valve cylinder head, air-to-air
aftercooling, a high-pressure common rail fuel system,
turbocharging and exhaust filter.
The primary differences between the engines below
174 hp and engines above that power range are in the
exhaust filter size, turbocharging and dosing. Exhaust
filters are matched appropriately to the engine size and
are engine- or remote-mounted for increased flexibility.
The engines utilize an internal in-cylinder dosing strategy,
while higher-horsepower engines utilize an external dosing system integrated into the exhaust system.
John Deere’s engines below 75 hp, which include the
Power Tech M and Power Tech E 2. 4 L and Power Tech
M 4. 5 L engines, meet Tier 4 interim and Stage 3a
emissions regulations without the use of cooled EGR or
an exhaust filter.
PowerTech M 2. 4 L and 4. 5 L engines feature a
two-valve cylinder head, a fixed-geometry turbocharger,
mechanical unit pump fuel system ( 2. 4 L) and mechanical
rotary fuel system ( 4. 5 L). PowerTech E 2. 4 L engines
feature a similar two-valve cylinder head and a fixed
geometry turbocharger, but add full-authority electronic
engine controls, an electronic unit pump fuel system and
are air-to-air aftercooled.
The PowerTech 6090AFM75 marine diesel engine is
the newest addition to the John Deere lineup and boasts
outputs to 425 hp. The 9.0 L displacement design is a
six-cylinder, electronically controlled, turbocharged and
air-to-engine coolant aftercooled marine engine. Vertical
fuel injectors are designed for clean burning, lower emissions and improved fuel economy.
John Deere also introduced the gen-set ratings for its
PowerTech 6068AFM75, 6090SFM75 and 6135SFM75
marine generator-drive engines.
The gen-set ratings for these three models include:
• PowerTech 6068AFM75: up to 191 kVA (153 k We) at
60 Hz (1800 rpm);
John Deere announced new emergency stationary
power ratings for its Power Tech 13. 5 L and Power Tech E
6. 8 and 9.0 L diesel engines.
The PowerTech 13. 5 L, 6135HFG75 generator drive
diesel engine offers an emergency stationary power rating of 563 k W at 1800 rpm. The 6135HFG75 is available
with an NSPS emergency stationary label for the U.S. and
Canadian markets and is capable of meeting Tier 2 emissions regulations as required by emergency stationary
regulations for gen-set ratings greater than 560 kW, the
The PowerTech 13. 5 L features a fixed-geometry turbocharger, electronic unit injector fuel system, four-valve
cylinder head, air-to-air aftercooling and full-authority
electronic controls. Deere said the engine offers quick-starting and clean-running performance for emergency
standby gen-set applications in the U.S. and Canada.
The Power Tech E 6. 8 L, 6068HFG82 carries both EPA
Tier 3 Emergency Stationary and EU Stage 3a certification, with dual frequency ratings of 1800 and 1500 rpm.
The 212 kWm rating at 1800 rpm was previously
available from John Deere with a PowerTech Plus 6. 8
L engine. The new engine will also have a 202 kWm
power rating at 1500 rpm, which provides gen-set owners a competitive advantage by offering a dual-frequency
PowerTech E engine at the same power level, the company said. Before the introduction of these new ratings,
the highest PowerTech E 6. 8 L power rating was 177
k Wm at 1800 rpm.
The new power rating for the PowerTech E 9.0 L,
6090HFG86 is 345 k Wm at 1800 rpm. The Power Tech E
9.0 L engine offers increased power density in a smaller
package, and the new rating extends John Deere’s
PowerTech E 9.0 L power range from 229 to 315 k Wm to
229 to 345 kWm for emergency standby applications in
the U.S. and Canada.
The lineup of John Deere generator-drive engines
ranges in displacement from 2. 4 to 13. 5 L and covers gen-set ratings from 48 to 755 hp. These engines include non-emissions certified; EU Stage 2 and Stage 3a; and EPA
non-emissions certified, Tier 3 and Tier 4 interim models.
continued on page 52
50 DIESEL PROGRESS NORTH AMERICAN EDITION June 2011