New | 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.

Power Rating
Minimum Power60.3 bhp
Maximum Power74.3 bhp
Rated Speed2200 & 2500 rpm
Emission Standards
EmissionsU.S. EPA Tier 4 Final, EU Stage IIIB Nonroad Emission Standards
Engine ConfigurationIn-Line 4, 4-Stroke-Cycle Diesel
Bore99 mm (3.9 in)
Stroke110 mm (4.3 in)
Displacement3.4 L (207.5 in³)
AspirationTurbocharged (T)
Compression Ratio17:1
Combustion SystemDirect Injection
Rotation (from flywheel end)Counterclockwise
Cooling System Capacity6 L (6.3 qt)
Engine Dimensions (Approximate. Final dimensions dependent on selected options)
Length610 mm (24 in)
Width653 mm (25.7 in)
Height829.5 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)
LengthWall Flow: 541 mm (21.3 in). Through Flow: 509 mm (20 in)
WeightWall Flow: 20 kg (44 lb). Through Flow: 14 kg (30.8 lb)
DiameterWall-Flow: 180 mm (7.1 in). Through Flow: 149 mm (5.8 in)

U.s. Epa Tier 4 Final, Eu Stage Iiib Emission Standards.

World-class Manufacturing Capability And Processes Coupled With Proven Core Engine Designs Assure Reliability, Quiet Operation, And Many Hours Of Productive Life.

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 Consumption Optimized To Match Operating Cycles Of A Wide Range Of Equipment And Applications While Maintaining Low Operating Costs.

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.

Industry Leading Range Of Factory Configurable Ratings And Options For Agricultural, Material Handling, Construction, Mining, Aircraft Ground Support, And Other Industrial Applications.

Worldwide Service Delivers Ease Of Maintenance And Simplifies The Servicing Routine. Capable Of Optimal Oil Change Intervals Of 500 Hours. Service-free Through-flow Diesel Particulate Filter (dpf) For Tier 4 Final, Stage Iiib. The S·o·s℠ Program Is Available From Your Cat Dealer To Determine Oil Change Intervals And Provide Optimal Performance.

Every Cat Engine Is Manufactured To Stringent Quality Standards In Order To Assure Customer Satisfaction.

  • scheduled Maintenance, Including S•o•s℠ Sample
  • customer Support Agreements (csa)
  • caterpillar Extended Service Coverage (esc)
  • superior Dealer Service Network
  • extended Dealer Service Network Through The Cat Industrial Service Distributor (isd) Program

technology And Power. The Diesel Particulate Filter (dpf) Technology Chosen Performs Through The Work Cycle Of The Engine, Allowing It To Work Efficiently. Engine Performance Has Been Optimized To Provide Maximum Power, And The Emissions Module Is Invisible To The Operator In Most Duty Cycles.

mounting. Multiple Off And On Engine Installation Options Provide Customers With Simple And Flexible Solutions For Many Applications.
service. minimum 3,000 Hour Dpf Ash Service Intervals For Wall-flow Dpf. Through-flow Dpf Is Service-free For The Emissions Life Of The Engine.

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
  • 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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