Cat® C3.4B Diesel Engine



Technical Specifications
Benefits and Features

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.

Power Rating
Maximum Power 74.3 HP
Rated Speed 2200 & 2500 rpm
Minimum Power 60.3 HP
Emission Standards
Emissions U.S. EPA Tier 4 Final,
Engine Configuration In-Line 4, 4-Stroke-Cycle Diesel
Bore 3.9 in
Stroke 4.3 in
Displacement 207.5 in³
Compression Ratio 17:01
Aspiration Turbocharged (T)
Combustion System Direct Injection
Rotation from Flywheel End Counterclockwise
Engine Dimensions - Approximate
Length 24 in
Width 25.7 in
Height 32.6 in
Weight - Net Dry - Basic Operating Engine Without Optional Attachments 553.4 lb
Aftertreatment Dimensions
Length 21.3 in
Diameter 7.1 in
Weight 44 lb

Reliable, Quiet and Durable Power

World-class manufacturing capability and processes coupled with proven core engine designs assure reliability, quiet operation, and many hours of productive life.

High Performance

Leading-edge technology provides significant improvements in power, torque, fuel consumption and response. Technology includes single smart wastegated turbo systems, durable high pressure common rail technology, and closed circuit breathing system.

Fuel Efficiency

Fuel consumption optimized to match operating cycles of a wide range of equipment and applications while maintaining low operating costs.

Fuel & Oil

Tier 4 Interim or Tier 4 Final, Stage IIIB or Stage IV engines require Ultra Low Sulfur Diesel (ULSD) fuel containing a maximum of 15 ppm sulfur, and new oil formulations to support the new technology. Cat® engines are designed to accommodate B20 biofuel. Your Cat dealer can provide more information regarding fuel and oil.

Broad Application Range

Industry leading range of factory configurable ratings and options for agricultural, material handling, construction, mining, aircraft ground support, and other industrial applications.

Standard Equipment:

  • 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
  • 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