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Maximum Power108.6 HP (81 kW)
EmissionsUN ECE R96 Stage IIIA
Rated Speed2200 rpm
Minimum Power81.8 HP (61 kW)
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.


Maximum Power108.6 HP (81 kW)
EmissionsUN ECE R96 Stage IIIA
Rated Speed2200 rpm
Minimum Power81.8 HP (61 kW)
Engine ConfigurationInline 4, 4-Stroke-Cycle Diesel
Bore4.1 in (105 mm)
Stroke5 in (127 mm)
Displacement268.5 in³ (4.4 l)
Compression Ratio18.2:1
AspirationTurbocharged (T)
Rotation from Flywheel EndCounterclockwise
Length49.6 in (1260 mm)
Width28.9 in (734 mm)
Height38 in (964 mm)
Weight1025 lb (465 kg)

Benefits and Features

World-class manufacturing capability and processes coupled with proven core engine designs assure reliability, quiet operation, and many hours of productive life.

Fuel consumption optimized to match operating cycles of a wide range of equipment and applications while maintaining low operating costs.

  • Scheduled maintenance, including SOSSM sample
  • Customer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

Standard Equipment

  • Mounted air filter and turbocharger
  • Available in 12 volt or 24 volt systems
  • Starter motor 12V or 24V
  • Fan (pusher or puller)
  • Fan drive
  • Radiator
  • Water pump
  • Flywheel
  • SAE No. 3 flywheel housing
  • Fuel filter
  • Oil cooler
  • Lube oil filter
  • Timing case oil filler
  • Engine mounting brackets
  • SAE A or SAE B front PTO (142/280 NM)
  • Paint: Caterpillar yellow, with optional colors available at request