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John Deere 6068HF485 6.8L Industrial Diesel Engine

New / John Deere Products / Engines and Drivetrain / Industrial Diesel Engines / Tier 3/Stage III A / 6068HF485 6.8L Industrial Diesel Engine
Model Photo

 

Features

4-valve cylinder head

  • The 4-valve cylinder head provides excellent airflow resulting in greater low-speed torque and better transient response.

High-pressure common-rail (HPCR) and engine control unit (ECU)

  • The HPCR fuel system provides variable common-rail pressure, multiple injections, and higher injection pressures, up to 1600 bar (23,000 psi). It also controls fuel injection timing and provides precise control for the start, duration, and end of the injection

Cooled exhaust gas recirculation (EGR)

  • EGR cools and mixes measured amounts of cooled exhaust gas with incoming fresh air to lower peak combustion temperatures, thereby reducing NOx

Variable geometry turbocharger (VGT)

  • Varies exhaust pressure based on load and speed to insure proper EGR flow; greater low-speed torque, quicker transient response, higher peak torque, and best-in-class fuel economy.

Air-to-air aftercooled

  • This is the most efficient method of cooling intake air to help reduce engine emissions while maintaining low-speed torque, transient response time, and peak torque. It enables an engine to meet emissions regulations with better fuel economy and the lowest installed costs

Compact size

  • Horsepower/displacement ratio is best-in-class
  • Lower installed cost
  • Mounting points are the same as Tier 2/Stage II engine models

Engine performance

  • Multiple rated speeds to further reduce noise and improve fuel economy
  • New higher peak torque ratings
  • Better transient response time
  • Greater levels of low speed torque
  • Higher levels of power bulge

John Deere electronic engine controls

  • Electronic engine controls monitor critical engine functions, providing warning and/or shutdown to prevent costly engine repairs and eliminate the need for add-on governing components all lowering total installed costs. Snapshot diagnostic data that can be retrieved using commonly available diagnostic service tools
  • Controls utilize new common wiring interface connector for vehicles or available OEM instrumentation packages; new solid conduit and "T" connectors to reduce wiring stress and provide greater durability and improved appearance
  • Factory-installed, engine mounted ECU or remote-mounted ECU comes with wiring harness and associated components. Industry-standard SAE J1939 interface communicates with other vehicle systems, eliminating redundant sensors and reducing vehicle installed cost

Additional features

  • Glow plugs
  • Gear-driven auxiliary drives
  • 500-hour oil change
  • Self-adjusting poly-vee fan drive
  • R.H. and L.H. engine-mounted fuel filters

Emissions Certifications

Less Regulated  
Tier 3  
Stage IIIA equivalent  

General engine data

Model 6068HF485
Number of cylinders 6
Displacement-- L (cu in) 6.8 (415)
Bore and Stroke-- mm (in) 106 x 127 (4.17 x 5.00)
Compression Ratio 17.0 : 1
Engine Type In-line, 4-Cycle
Aspiration Turbocharged and air-to-air aftercooled
Length - mm (in) 1161 (45.7)
Width-- mm (in) 616 (24.3)
Height-- mm (in) 1128 (44.4)
Weight, dry - kg (lb) 678 (1495)

Performance data range

Intermittent - Rated power/Rated speed 205 kW (275 hp) @2000-2400 rpm
Intermittent - Peak power 168-206 kW (225-276 hp) @1800-2200 rpm
Intermittent - Power bulge 0-4 % @1800 rpm
Intermittent - Peak torque 1025 N·m (756 ft-lb) @1400 rpm
Intermittent - Torque rise 26-32%
Heavy Duty - Rated power/Rated speed 144-168 kW (193-225 hp) @2000-2200 rpm
Heavy Duty - Peak power 153-181 kW (205-243 hp) @1600-2000 rpm
Heavy Duty - Power bulge 6-8 % @1700-2000 rpm
Heavy Duty - Peak torque 934 N·m (689 ft-lb) @1400 rpm
Heavy Duty - Torque rise 28-36%
Continuous - Rated power/Rated speed 134-168 kW (180-225 hp) @2000-2400 rpm
Continuous - Peak power 137-168 kW (184-225 hp) @1600-2400 rpm
Continuous - Power bulge 0-3 % @1600 rpm
Continuous - Peak torque 838 N·m (618 ft-lb) @1400 rpm
Continuous - Torque rise 26-31%

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