Cat® C4.4 Industrial Power Unit

Cat® C4.4 Industrial Power Unit

The Cat® C4.4 Industrial Power Unit is offered in ratings ranging from 61-81 bkW (81.8-108.6 bhp) @ 2200 rpm. These ratings meet U.S. EPA Tier 3 equivalent, EU Stage IIIA equivalent emission standards. Conveniently pre-configured for a wide range of applications, the Cat® Industrial Power Unit is a complete power package containing a radiator, flywheel, alternator and alternator wiring completely pre-assembled for fast, straightforward installation in a number of OEM, customer and packager applications. These fuel efficient units are ready made for irrigation, industrial, mining and other pump applications.

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Power Rating

Minimum Rating
Maximum Rating
Rated Speed
2200 rpm

Emission Standards

U.S. EPA Tier 3 Equivalent, EU Stage IIIA Equivalent


Engine Configuration
Inline 4, 4-Stroke-Cycle Diesel
105 mm (4.1 in)
127 mm (5.0 in)
4.4 L (268.5 in³)
Turbocharged (T)
Compression Ratio
Combustion System
Direct Injection
Rotation (from flywheel end)

Power Unit Dimensions (Approximate. Final dimensions dependent on selected options)

1260 mm (49.6 in)
734 mm (28.9 in)
964 mm (38 in)
Weight - Net Dry (Standard configuration without oil, cooling, clutch, compressor, A/C)
465 kg (1025 lb)

Standard Equipment

  • Air Inlet System
    • Mounted air filter and turbocharger
  • Control System
    • Available in 12 volt or 24 volt systems
    • Starter motor 12V or 24V
  • Cooling System
    • Fan (pusher or puller)
    • Fan drive
    • Radiator
    • Water pump
  • Flywheels And Flywheel Housing
    • Flywheel
    • SAE No. 3 flywheel housing
  • Fuel System
    • Fuel filter
  • Lube System
    • Oil cooler
    • Lube oil filter
    • Timing case oil filler
  • Mountings
    • Engine mounting brackets
  • Power Take Off (pto)
    • SAE A or SAE B front PTO (142/280 NŸM)
  • General
    • Paint: Caterpillar yellow, with optional colors available at request