New | Cat® C3.4B Industrial Power Unit

The Cat® C3.4B Industrial Power Unit is offered at 55.4 bkW (74.3 bhp) @ 2200 rpm, which meets U.S. EPA Tier 4 Final, EU Stage IIIB nonroad emission standards. Conveniently pre-configured for a wide range of applications, the Cat Industrial Power Unit is a complete power package containing a radiator, flywheel, alternator and alternator wiring completely pre-assembled for fast, straightforward installation in a number of OEM, customer and packager applications. These fuel efficient units are ready made for irrigation, industrial, mining and other pump applications.

Power Rating
Minimum Power74 bhp
Maximum Power74 bhp
Rated Speed2200
Emission Standards
EmissionsMeets U.S. EPA Tier 4 Final, EU Stage IIIB nonroad 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)
Compression Ratio17:1
Rotation (from flywheel end)Counterclockwise
Power Unit Dimensions (Approximate. Final dimensions dependent on selected options)
Length1242 mm (48.9 in)
Width705 mm (27.7 in)
Height957 mm (37.6 in)
Weight - Approximate, Net Dry (Standard configuration without oil, cooling, clutch, compressor, A/C)359 kg (791.5 lb)
Aftertreatment Dimensions (Approximate. Final dimensions dependent on selected options)
Diameter149 mm (5.8 in)
Length509 mm (20 in)
Weight509 mm (20 in)

Ratings Less Than 55 Bkw/74 Bhp Meet U.s. Epa Tier 4 Final, Eu Stage Iiib Nonroad 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 Installation Options Provide Customers With Simple And Flexible Solutions For Many Applications. service. through-flow Dpf Is Service-free For The Emissions Life Of The Engine.

Standard Equipment

Air Inlet System
  • Standard air cleaners
Control System
  • Full electronic control system
  • Fully integrated, engine-mounted electronic control unit
  • Waterproof connectors and wiring looms
  • Flexible and configurable software features and J1939 standard communications I/O
Flywheels and Flywheel Housing
  • SAE3 configuration
Fuel System
  • Engine-mounted fuel filters
  • Electronic high pressure common rail fuel pump and injectors
Lube System
  • Lubricating oil filters and breathers
  • 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
  • Through Flow Diesel Particulate Filter (DPF)
  • Diesel Oxidation Catalyst (DOC)
  • Flex pipe connection kit with straight and 90° options for flexibility



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With only a few days notice, we were able to get the emergency system working properly. Hawthorne Cat provided great leadership and excellent field support.
Mark Cripe
Helix Electric

San Diego - Power
Steve Jamison
Power Systems Sales Manager
858.376.6821 office
858.688.0083 mobile

Phillip J. Smith (PJ)
Service Manager - CSA Group/Truck Shop
858.376.6874 office
858.688.0134 mobile

Dan Hixon
General Service Manager
858.376.6822 office
858.663.4652 mobile

Paul Karpf
Rental Department Manager
858.376.6888 office
858.688.0039 mobile

Tom Bonham
Product Support Sales Manager
858.376.6898 office
442.248.2108 mobile

Hawaii – Power
Cliff Yuen
Power Systems Sales Manager
808.676.0322 office
808.349.7767 mobile

Travis Tilton
General Service Manager
808.676.0314 office
808.864.1903 mobile

Bobby Fields
Rental Developer
808.676.0267 office
808.368.5445 mobile

Guam – Power
Myver Hecita
Power Systems Rental &
Sales Representative
671.649.4241 office
671.898.2740 mobile

Jimmy Cruz
Engine Service Manager
671.649.4216 office
671.488.2821 mobile