Cat® C4.4 Diesel Engine

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.

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Power Rating

Minimum Power
Maximum Power
Rated Speed
2200-2400 rpm

Emission Standards

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
105 mm (4.13 in)
127 mm (5.0 in)
4.4 L (269 in³)
Naturally Aspirated (NA), Turbocharged (T) or Turbocharged Aftercooled (TA)
Compression Ratio
Combustion System
Direct Injection
Rotation (from flywheel end)
Lube System (refill)
11 L (11.6 qt)

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

663 mm (26.1 in)
470-620 mm (18.5-24.4 in)
775-810 mm (30.5-31.9 in)
Weight, Net Dry (Basic Operating Engine Without Optional Attachments)
291-306 kg (640-674.6 lb)

Standard Equipment

  • 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
  • Lube System
    • 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