6068HFG94 6.8L Generator Drive Engine

6068HFG94 6.8L Generator Drive Engine


  • PowerTech™ PVX
  • Standby: 150-180 kW (201-241 hp) @ 1800 rpm
  • Prime: 136-164 kW (182-220 hp) @ 1800 rpm
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High-pressure common-rail (HPCR) and engine control unit (ECU)

  • The HPCR fuel system provides variable common–rail pressure and higher injection pressures up to 1,975 bar (29,000 psi). It also controls fuel injection timing and provides precise control for the start, duration, and end of injection.

4-valve cylinder head

  • The 4–valve cylinder head provides excellent airflow by utilizing a cross–flow design.

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

Fixed geometry turbocharger

  • Varies exhaust pressure based on load and speed to ensure proper EGR flow. The combination of the cooled EGR and VGT provide low–speed torque, quicker transient response, higher–peak torque, and world–class fuel economy.

Exhaust filters

  • These engines utilize an exhaust filter that contains a diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF). The DOC reacts with exhaust gases to reduce carbon monoxide, hydrocarbons, and some particulate matter (PM). The downstream DPF traps and holds the remaining PM. Trapped particles are oxidized within the DPF through a cleaning process called passive regeneration. Passive regeneration occurs during normal operating conditions when heat from the exhaust stream and catalysts the DOC within the exhaust filter trigger the oxidation of the trapped PM. If passive regeneration cannot be achieved due to temperature, load, or speed, then PM is removed using active regeneration — an automatic cleaning process controlled by the exhaust temperature management system.

Air-to-air aftercooled

  • This is the most efficient method of cooling intake air to help reduce engine emissions. It enables an engine to meet emissions regulations with better fuel economy and the lowest installed costs.

John Deere electronic engine controls

  • Faster engine control unit (ECU) manages both the engine and the exhaust filter
  • Full authority electronic controls
  • Four times the memory, twice the RAM, and double the processing speed
  • Input/output capability has increased 40%.

Additional features

  • Compact size: lower installed cost
  • Mounting points are the same as previous engine models
  • Glow plugs
  • 500–hour oil change
  • Self–adjusting poly–vee fan drive
  • Variable–speed fan drive increases fuel economy and decreases noise levels
  • R.H. and L.H. engine-mounted final fuel filters
  • Aluminum piston with integrated oil cooled gallery
  • Low–pressure fuel system with electrical transfer pump and "auto–prime" feature.


Emissions certifications

EPA Interim Tier 4

General engine data

Model 6068HFG94
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 17.2 : 1
Engine Type In-line, 4-cycle
Aspiration Turbocharged and air-to-air aftercooled
Length - mm (in) 1161 (45.7)
Width-- mm (in) 716 (28.2)
Height-- mm (in) 1147 (45.2)
Weight, dry - kg (lb) 767 (1691)

DOC/DPF Dimensions

Size 5 - Diameter - mm (in) 320.5 (12.6)
Size 5 - Length - mm (in) 891.9 (35.1)
Size 5 - Weight - kg (lb) 30 (66.1)

Performance data range

Hz (rpm) 60 ( 1800 )
Generator Efficiency % 89-93
Power Factor 0.8
Engine power - Prime kW 137-164
Engine power - Prime hp 183-220
Engine power - Standby kW 150-180
Engine power - Standby hp 201-241
Rated Fan Power - kW 9-10.8
Rated Fan Power - hp 12.1-14.5
Calculated generator set output - Prime kWe 114-143
Calculated generator set output - Prime kVA 143-179
Calculated generator set output - Standby kWe 125-157
Calculated generator set output - Standby kVA 157-197