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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 45-55.4 bkW (60-74.3 bhp) @ 2200-2500 rpm, which meet U.S. EPA Tier 4 Final, EU Stage IIIB 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 Power45.0 bkW
  • Maximum Power55.4 bkW
  • Frequency2200 & 2500 rpm
  • EmissionsU.S. EPA Tier 4 Final, EU Stage IIIB Nonroad Emission Standards
  • Engine ConfigurationIn-Line 4, 4-Stroke-Cycle Diesel

Product Details

Power Rating

Minimum Power 45.0 bkW
Maximum Power 55.4 bkW
Frequency 2200 & 2500 rpm

Emission Standards

Emissions U.S. EPA Tier 4 Final, EU Stage IIIB Nonroad Emission Standards


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 (T)
Compression Ratio 17:1
Combustion System Direct Injection
Rotation (from flywheel end) Counterclockwise
Cooling System Capacity 6 L (6.3 qt)

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

Length 610 mm (24 in)
Width 653 mm (25.7 in)
Height 829.5 mm (32.6 in)
Weight - Net Dry (Basic Operating Engine Without Optional Attachments) 251 kg (553.4 lb)

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

Length Wall Flow: 541 mm (21.3 in). Through Flow: 509 mm (20 in)
Weight Wall Flow: 20 kg (44 lb). Through Flow: 14 kg (30.8 lb)
Diameter Wall-Flow: 180 mm (7.1 in). Through Flow: 149 mm (5.8 in)
  • Air Inlet System
    •  Induction manifolds
    •  Exhaust manifolds
  • 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
      • 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 IIIB Aftertreatment/Clean Emissions Control Equipment
        •  Diesel Particulate Filter (DPF)
        •  Diesel Oxidation Catalyst (DOC)
        •  Flex pipe connection kit with straight and 90° options for flexibility

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