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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® C6.6 ACERT™ Diesel Engine

The Cat® C6.6 ACERT Industrial Diesel Engine is offered in ratings ranging from 89-205 bkW (119-275 bhp) @ 2200-2500 rpm. These ratings meet U.S. EPA Tier 3 equivalent, EU Stage IIIA equivalent emission standards. Industries and applications powered by C6.6 ACERT engines include: Agriculture, Ag Tractors, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Combines/Harvesters, 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 and Underground Mining Equipment.

  • Specification Summary

  • Minimum Power89.0 bkW
  • Maximum Power205.0 bkW
  • Frequency2200-2500 rpm
  • EmissionsU.S. EPA Tier 3 Equivalent, EU Stage IIIA Equivalent
  • Engine ConfigurationInline 6, 4-Stroke-Cycle Diesel

Product Details

Power Rating

Minimum Power 89.0 bkW
Maximum Power 205.0 bkW
Frequency 2200-2500 rpm

Emission Standards

Emissions U.S. EPA Tier 3 Equivalent, EU Stage IIIA Equivalent


Engine Configuration Inline 6, 4-Stroke-Cycle Diesel
Bore 105 mm (4.13 in)
Stroke 127 mm (5.0 in)
Displacement 6.6 L (402.8 in³)
Aspiration Turbocharged Aftercooled (TA)
Compression Ratio 16.2:1
Combustion System Direct Injection
Rotation (from flywheel end) Counterclockwise

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

Length 929 mm (36.6 in)
Width 668 mm (26.3 in)
Height 797 mm (31.4 in)
Weight, Net Dry (Basic Operating Engine Without Optional Attachments) 506 kg (1116 lb)
  • Air Inlet System
    •  Turbocharged
    •  Air-to-Air Aftercooled
  • Turbocharged
    • Air-to-Air Aftercooled
      • Control System
        •  Electronic governing, PTO speed control
        •  Programmable ratings
        •  Automatic altitude compensation
        •  Power compensation for fuel temperature
        •  Programmable low and high idle and total engine limit
        •  Electronic diagnostics and fault logging
        •  Engine monitoring system SAE J1939 broadcast and control
        •  ADEM™ A4 Electronic Control Unit (ECU)
      • Cooling System
        •  Thermostats and housing, vertical outlet
        •  Jacket water pump, centrifugal
        •  Water pump, inlet
      • Thermostats and housing, vertical outlet
        • Jacket water pump, centrifugal
          • Water pump, inlet
            • Exhaust System
              •  Exhaust manifold, dry
              •  Optional exhaust outlet
            • Flywheels and Flywheel Housing
              •  Choice of SAE No. 2 or SAE No. 3 flywheel housing
            • Fuel System
              •  Electronic high pressure common rail
              •  Fuel filter, secondary (2 micron)
              •  ACERT™ Technology
              •  Fuel transfer pump
              •  Fuel priming pump
            • Lube System
              •  Crankcase breather
              •  Oil cooler
              •  Oil filler
              •  Lube oil filter
              •  Front sump oil pan
              •  Oil dipstick
              •  Gear driven oil pump
            • Crankcase breather
              • Oil cooler
                • Oil filler
                  • Lube oil filter
                    • Front sump oil pan
                      • Oil dipstick
                        • Gear driven oil pump
                          • General
                            •  Vibration damper
                            •  Lifting eyes
                            •  Cold start capability to -20° C (-4° F)
                            •  Paint: Caterpillar yellow, with optional colors available at request
                          • Vibration damper
                            • Lifting eyes
                              • Cold start capability to -20° C (-4° F)
                                • Paint: Caterpillar yellow, with optional colors available at request

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