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 EndCounterclockwise
Power Unit Dimensions - Approximate
Height957 mm (37.6 in)
Length1242 mm (48.9 in)
Weight - Approximate, Net Dry - Standard Configuration Without Oil, Cooling, Clutch, Compressor, A/C359 kg (791.5 lb)
Width705 mm (27.7 in)
Aftertreatment Dimensions - Approximate
Diameter149 mm (5.8 in)
Weight509 mm (20 in)
Length509 mm (20 in)

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.

  • scheduled Maintenance, Including Sos℠ 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

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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Why Cat is Better. Machine Comparison

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
858.376.6874 office
858.688.0134 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

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

Richard Nostratis
Service Manager
671.649.4212 office
671.898.2735 mobile