• 4045HFG04
  • PowerTech™ PWL
  • Standby: 67-99 kW (90-133 hp) @ 1800 rpm
  • Prime: 61-90 kW (82-122 hp) @ 1800 rpm


Emissions Certifications

EPA Final Tier 4 

General engine data

Number of cylinders4
Displacement-- L (cu in)4.5 (275)
Bore and Stroke-- mm (in)106 x 127 (4.17 x 5.00)
Compression Ratio17.0 : 1
Engine TypeIn-line, 4-cycle
AspirationTurbocharged and air-to-air aftercooled
Length - mm (in)870 (34.3)
Width-- mm (in)650 (25.6)
Height-- mm (in)1050 (41.3)
Weight, dry - kg (lb)550 (1213)

DOC Dimensions

Size 2 - Diameter - mm (in)209.1 (8.2)
Size 2 - Length - mm (in)431 (17.0)
Size 2 - Weight - kg (lb)14.9 (32.8)

SCR Catalyst Dimensions

Size 3 - Diameter -mm(in)318 (12.5)
Size 3 - Weight -kg(lb)34 (75.0)
Size 3 - Length -mm(in)638 (25.1)

Performance data range

Hz (rpm)60 ( 1800 )
Generator Efficiency %88-92
Power Factor0.8
Engine power - Prime kW61-90
Engine power - Prime hp82-122
Engine power - Standby kW67-99
Engine power - Standby hp90-133
Rated Fan Power - kW4.7-6.9
Rated Fan Power - hp6.3-9.3
Calculated generator set output - Prime kWe50-77
Calculated generator set output - Prime kVA62-96
Calculated generator set output - Standby kWe55-85
Calculated generator set output - Standby kVA69-106


  • Wastegated turbochargers are designed to develop more airflow at lower engine speeds to improve low-speed torque. The wastegate control device bleeds off a portion of the exhaust flow at higher engine speeds. Wastegated turbos deliver improved transient response and higher peak torque without compromising engine envelope size. They also provide the lowest installed cost across a given power range.

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

  • PowerTech PWL 4.5L engines for Final Tier 4/Stage IV produce near-zero levels of particulate matter (PM) without a filter thanks to an optimized combustion system and engine calibration. Remaining PM and other hydrocarbons are oxidized passively in a flow-through DOC without the need for regeneration.

  • The HPCR fuel system provides variable common-rail pressure, multiple injections, and higher injection pressures up to 2,500 bar (36,000 psi). It also controls fuel injection timing and provides precise control for the start, duration, and end of injection.

  • John Deere engines feature an SCR system that utilizes a urea-based additive, sometimes referred to as diesel exhaust fluid (DEF). The ammonia in the urea reacts with engine exhaust gases in the SCR catalyst to reduce NOx — converting it to nitrogen and water vapor.

  • The 4-valve cylinder head provides excellent airflow resulting in greater low-speed torque and better transient response time by utilizing a cross-flow design.

  • 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.

  • Lower installed cost

  • Faster engine control unit (ECU) manages both the engine and the aftertreatment

  • Gear-driven auxiliary drives