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Industrial Diesel Power Units - Lesser Regulated & Non-Regulated

Cat® industrial engines are ready for your application. These engines deliver the unsurpassed reliability, durability, fuel efficiency, and low cost of ownership you have come to expect from Caterpillar. And our world-class product support will never let you down. All this adds up to a powerful advantage for you. Every Cat industrial diesel and gas engine comes with 75 years of engine experience. Our world-class product line of high-speed and medium-speed industrial engines in a wide range of applications offer power solutions for the most demanding installations and the harshest environments. With power options from 8.2 to 6,100 bkW (11 to 8,180 bhp), Cat industrial diesel and gas engines offer the widest power range in the industry.

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.

  • Specification Summary

  • Minimum Rating 61.0 bkW
  • Maximum Rating 81.0 bkW
  • Frequency 2200 rpm
  • Emissions U.S. EPA Tier 3 Equivalent, EU Stage IIIA Equivalent

Product Details

Power Rating

Minimum Rating 61.0 bkW
Maximum Rating 81.0 bkW
Frequency 2200 rpm

Emission Standards

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


Engine Configuration Inline 4, 4-Stroke-Cycle Diesel
Bore 105 mm (4.1 in)
Stroke 127 mm (5.0 in)
Displacement 4.4 L (268.5 in³)
Aspiration Turbocharged (T)
Compression Ratio 18.2:1
Combustion System Direct Injection
Rotation (from flywheel end) Counterclockwise

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

Length 1260 mm (49.6 in)
Width 734 mm (28.9 in)
Height 964 mm (38 in)
Weight - Net Dry (Standard configuration without oil, cooling, clutch, compressor, A/C) 465 kg (1025 lb)
  • Air Inlet System
    •  Mounted air filter and turbocharger
  • 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 N?M)
    • General
      •  Paint: Caterpillar yellow, with optional colors available at request
    Catepillar Equipments