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Industrial Diesel Engines - 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 Diesel Engine

The Cat® C4.4 Naturally Aspirated (NA) Industrial Diesel Engine is offered in ratings ranging from 54-56 bkW (72.4-75 bhp) @ 2200 rpm. These ratings meet EU Stage IIIA equivalent emission standards. Turbocharged (T) and Turbocharged Aftercooled (TA) Ratings are also available, ranging from 55.5-83 bkW (74.4-111.3 bhp) @ 2200-2400 rpm. These ratings meet U.S. EPA Tier 3 equivalent, EU Stage IIIA equivalent emission standards. Industries and applications powered by C4.4 engines include: Agriculture, Aerial Lifts, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Compactors/Rollers, Compressors, Construction, Cranes, Crushers, Feller Bunchers, Forestry, Forklifts, General Industrial, Harvesters, Hydraulic Power Units, Irrigation Equipment, Loaders/Forwarders, Material Handling, Mining, Mobile Earthmoving Equipment, Mobile Sweepers, Paving Equipment, Pumps, Skidders, Specialty Ag Equipment, Sprayers, Trenchers, Turf and Landscaping and Underground Mining Equipment.

  • Specification Summary

  • Minimum Power 54.0 bkW
  • Maximum Power 83.0 bkW
  • Rated Speed 2200-2400 rpm
  • Emissions EU Stage IIIA Equivalent (NA). U.S. EPA Tier 3 Equivalent, EU Stage IIIA Equivalent (T, TA)

Product Details

Power Rating

Minimum Power 54.0 bkW
Maximum Power 83.0 bkW
Rated Speed 2200-2400 rpm

Emission Standards

Emissions EU Stage IIIA Equivalent (NA). U.S. EPA Tier 3 Equivalent, EU Stage IIIA Equivalent (T, TA)


Engine Configuration Inline 4, 4-Stroke-Cycle Diesel
Bore 105 mm (4.13 in)
Stroke 127 mm (5.0 in)
Displacement 4.4 L (269 in³)
Aspiration Naturally Aspirated (NA), Turbocharged (T) or Turbocharged Aftercooled (TA)
Compression Ratio 16.2:1
Combustion System Direct Injection
Rotation (from flywheel end) Counterclockwise
Lube System (refill) 11 L (11.6 qt)

Engine Dimensions (Approximate. Final dimensions dependent on selected options)

Length 663 mm (26.1 in)
Width 470-620 mm (18.5-24.4 in)
Height 775-810 mm (30.5-31.9 in)
Weight, Net Dry (Basic Operating Engine Without Optional Attachments) 291-306 kg (640-674.6 lb)
  • Air Inlet System
    •  Inlet manifold with choice of inlets.
  • Control System
    •  Alternator
    •  Starter motor
    •  Control Panel
    •  Glow plug starting aid
  • Cooling System
    •  Top tank temperature 108° C (226° F) as standard to minimize cooling pack size
    •  50:50 water glycol mix
  • Flywheels and Flywheel Housing
    •  SAE No. 3 flywheel housing
    •  Flywheel and starter rings
  • Fuel System
    •  Fuel filter positions
  • Fuel filter positions
    • Lube System
      •  Lubricating oil filters and breathers
      •  Oil filter positions
      •  Lube oil sump
    • Lubricating oil filters and breathers
      • Oil filter positions
        • Lube oil sump
          • Power Take Off
            •  SAE B Power Take Off (PTO)
          • General
            •  Timing case and gear-driven auxiliaries
            •  Belt-driven auxiliaries
            •  Engine mountings
            •  Gauges
            •  Displays
            •  Power and torque curve tailoring
            •  Paint: Caterpillar yellow, with optional colors available at request
          Catepillar Equipments