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Industrial Diesel Engines - Highly 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® C3.4B Diesel Engine

Cat® C3.4B Industrial Diesel Engines offer the perfect balance of durability, fuel efficiency and low emissions. The C3.4B Industrial Engine is offered in ratings ranging from 63-90 bkW (84.5-120.7 bhp) @ 2200-2500 rpm, which meet U.S. EPA Tier 4 Final, EU Stage IV emission standards. Industries and applications powered by C3.4B engines include: Agriculture, Aerial Lifts, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Compactors/Rollers, Compressors, Construction, Forestry, General Industrial, Irrigation Equipment, Material Handling, Mining, Mobile Earthmoving Equipment, Mobile Light Towers, Mobile Sweepers, Paving Equipment, Pumps, Specialty Ag Equipment, Trenchers, Turf and Landscaping and Underground Mining Equipment.

  • Specification Summary

  • Minimum Power63 bkW
  • Maximum Power90.0 bkW
  • Frequency2200 & 2500 rpm
  • EmissionsU.S. EPA Tier 4 Final, EU Stage IV Nonroad Emission Standards. U.S. EPA Tier 4 Interim Equivalent and EU Stage IIIB Equivalent
  • Engine ConfigurationIn-Line 4, 4-Stroke-Cycle Diesel

Product Details

Power Rating

Minimum Power 63 bkW
Maximum Power 90.0 bkW
Frequency 2200 & 2500 rpm

Emission Standards

Emissions U.S. EPA Tier 4 Final, EU Stage IV Nonroad Emission Standards. U.S. EPA Tier 4 Interim Equivalent and EU Stage IIIB Equivalent


Engine Configuration In-Line 4, 4-Stroke-Cycle Diesel
Bore 99 mm (3.9 in)
Stroke 110 mm (4.3 in)
Displacement 3.4 L (207.5 in³)
Aspiration Turbocharged-Aftercooled (TA)
Compression Ratio 17:1
Combustion System Direct Injection
Rotation (from flywheel end) Counterclockwise
Cooling System Capacity 6 L (6.3 qt)

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

DOC Length 320 mm (12.6 in)
DOC Weight 15 kg (33 lb)
DOC Diameter 196 mm (7.7 in)
SCR Weight 20 kg (44 lb)
SCR Diameter 251 mm (9.88 in)
SCR Length 520 mm (20.47 in)
  • Air Inlet System
    •  Induction manifolds
    •  Exhaust manifolds
  • Control System
    •  Starter motor
    •  Alternator
    •  Electronic Control Unit
    •  Sensors for: engine speed, oil pressure, and coolant temperature
  • Cooling System
    •  Cooling packs
  • Cooling packs
    • Flywheels and Flywheel Housing
      •  Flywheel housings
      •  Flywheel and starter rings
    • Fuel System
      •  Fuel filter positions
      •  Common rail fuel pump and injectors
    • Lube System
      •  Lubricating oil filters
    • General
      •  Cold start capability to -20° C (-4° F)
      •  Paint: Caterpillar yellow, with optional colors available at request
    • U.S. EPA Tier 4 Final, EU Stage IV Aftertreatment/ Clean Emissions Control Equipment
      •  Diesel Oxidation Catalyst (DOC)
      •  Selective Catalytic Reduction (SCR)
      •  SCR Auxiliaries

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