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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® C2.2 Industrial Power Unit

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.

  • Specification Summary

  • Minimum Rating 37.3 bkW
  • Maximum Rating 49.2 bkW
  • Rated Speed 2800-3000 rpm.
  • Emissions U.S. EPA Tier 4 Interim Equivalent, EU Stage IIIA Equivalent

Product Details

Power Rating

Minimum Rating 37.3 bkW
Maximum Rating 49.2 bkW
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)
  • Air Inlet System
    •  Inlet manifold
  • Inlet manifold
    • Control System
      •  Alternator 12 volt 65 amp
      •  Tier 4 Final: Alternator 12V 85 amp
      •  Starter motor 12 volt
      •  Glow plug starting aid
    • 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)
            • 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
                  • 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)
                        • General
                          •  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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