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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® 3406C Diesel Engine

The Cat® 3406C Industrial Diesel Engine is offered in ratings ranging from 298-347 bkW (400-465 bhp) @ 1800-2100 rpm and is available for global non-regulated areas. Industries and applications powered by 3406C engines include: Agriculture, Ag Tractors, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Combines/Harvesters, Compactors/Rollers, Compressors, Construction, Cranes, Crushers, Dredgers, Forestry, General Industrial, Hydraulic Power Units, Irrigation Equipment, Loaders/Forwarders, Material Handling, Mining, Mobile Earthmoving Equipment, Paving Equipment, Pumps, Shovels/Draglines, Specialty Ag Equipment, Surface Hauling Equipment, Trenchers and Underground Mining Equipment.

Product Details

Power Rating

Minimum Power 280 bkW
Maximum Power 347.0 bkW
Frequency 1800-2100 rpm

Emission Standards

Emissions Non-Certified


Engine Configuration Inline 6, 4-Stroke-Cycle Diesel
Bore 137.2 mm (5.4 in)
Stroke 165.1 mm (6.5 in)
Displacement 14.64 L (893.39 in³)
Aspiration Turbocharged Aftercooled
Compression Ratio 14.5:1
Rotation (from flywheel end) Counterclockwise
Lube System (refill) 34.1 L (36 qt)

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

Length 1660 mm (65.35 in)
Width 906 mm (35.67 in)
Height 1335 mm (52.56 in)
Weight, Net Dry (Basic Operating Engine Without Optional Attachments) 1300 kg (2866 lb)
  • Air Inlet System
    •  Air cleaner. Regular duty, dry, panel type with service indicators, turbocharger, jacket water aftercooled.
  • Control System
    •  Hydra-mechanical governor
  • Cooling System
    •  Thermostats and housing
    •  Jacket water pump, centrifugal
  • Thermostats and housing
    • Jacket water pump, centrifugal
      • Exhaust System
        •  Exhaust manifold, dry
        •  Exhaust elbow, dry, 152 mm (6 in), 4 bolt flange
      • Exhaust manifold, dry
        • Exhaust elbow, dry, 152 mm (6 in), 4 bolt flange
          • Flywheels and Flywheel Housing
            •  SAE No. 1 flywheel
            •  SAE No. 1 flywheel housing
            •  SAE standard rotation
          • Fuel System
            •  Fuel filter, LH
            •  Fuel transfer pump
            •  Fuel priming pump
          • Fuel filter, LH
            • Fuel transfer pump
              • Fuel priming pump
                • Instrumentation
                  •  Instrument panel, LH
                  •  Engine oil pressure gauge
                  •  Fuel pressure gauge
                  •  Water temperature gauge
                  •  Service meter
                • Instrument panel, LH
                  • Engine oil pressure gauge
                    • Fuel pressure gauge
                      • Water temperature gauge
                        • Service meter
                          • Lube System
                            •  Crankcase breather
                            •  Oil cooler
                            •  Lube oil filter
                            •  Oil filler in valve cover and dipstick, both RH
                            •  Rear sump oil pan
                          • Mounting System
                            •  Supports
                          • Supports
                            • General
                              •  Vibration damper
                              •  Lifting eyes
                              •  Paint: Caterpillar yellow, with optional colors available at request
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