The Cat® C2.2 Industrial Power Unit is offered in ratings ranging from 37.3 - 49.2 bkW (50.0 - 65.9 bhp) @ 2800-3000 rpm. These ratings meet U.S. EPA Tier 4 Interim 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.


Power Rating
Minimum Rating 50 BHP
Maximum Rating 65.9 BHP
Rated Speed 2800-3000 rpm.

Emission Standards
Emissions U.S. EPA Tier 4 Interim Equivalent, EU Stage IIIA Equivalent

Engine Configuration Inline 4, 4-Stroke-Cycle Diesel
Bore 84 mm (3.3 in)
Stroke 100 mm (3.9 in)
Displacement 2.216 L (135 in³)
Aspiration Naturally Aspirated (NA), Turbocharged (T), or Turbo Aftercooled (TA)
Compression Ratio 23.3:1
Rotation from Flywheel End Counterclockwise
Cooling System - Capacity 6.98 L (7.4 qt)
Lube System - Refill 10.6 L (11.2 qt)

Power Unit Dimensions - Approximate
Height 854-973 mm (33.62-38.3 in)
Length 946-973 mm (37.24-38.3 in)
Weight - Net Dry - Standard Configuration Without Oil, Cooling, Clutch, Compressor, A/C 218-228 kg (480-502 lb)
Width 513-590 mm (20.3-23.23 in)

Reliable, Quiet and Durable Power

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

Fuel Efficiency

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

Broad Application Range

Industry leading range of factory configurable ratings and options for agricultural, material handling, construction, mining, aircraft ground support, and other industrial applications.


Every Cat engine is manufactured to stringent quality standards in order to assure customer satisfaction.

World-class Product Support Offered Through Global Cat Dealer Network

  • 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

Air Inlet System
  • Inlet manifold
Control System
  • Alternator 12 volt 65 amp
  • Tier 4 Final: Alternator 12V 85 amp
  • Starter motor 12 volt
  • Glow plug starting aid
Cooling System
  • Belt-driven coolant pump
  • Coolant temperature switch
  • Mounted air cleaner
  • Mounted radiator and fan
Flywheels and Flywheel Housing
  • SAE No. 7 1/2 flywheel
  • SAE No. 4 flywheel housing
Fuel System
  • Fuel injection pump
  • Spin-on fuel filter
  • Electronic Shut-off Solenoid (ESOS)
Lube System
  • Spin-on lube oil filter
  • Lube oil pressure switch
  • Lube oil sump
Power Take Off (PTO)
  • Provision for Power Take Off (PTO)
  • SAE A PTO drive (Tier 4 Final, Stage IV)
  • Cast iron, engine block
  • Cast iron exhaust manifold--side outlet
  • Cold start capability to -20° C (-4° F)
  • Gradeability 35° continuous
  • Paint: Caterpillar yellow, with optional colors available at request

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