Cat® C3.4B Industrial Power Unit

C3.4B Industrial Power Unit

Cat® C3.4B Industrial Power Unit

The Cat® C3.4B Industrial Power Unit is offered at 75-86 bkW (100-115 bhp), which meets U.S. EPA Tier 4 Final, EU Stage IV 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.

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Product Specs


Rotation from Flywheel End
Compression Ratio
Turbocharged Aftercooled (TA)
3.4 L (207.5 in³)
110 mm (4.3 in)
99 mm (3.9 in)
Engine Configuration
In-Line 4, 4-Stroke-Cycle Diesel

Emission Standards

U.S. EPA Tier 4 Final, EU Stage IV nonroad emission standards. U.S. EPA Tier 4 Interim Equivalent or EU Stage IIIB Equivalent ratings also available using EPA or EU Flex Provisions.

Power Rating

Rated Speed
Minimum Power
Maximum Power

Power Unit Dimensions - Approximate

1252 mm (49.3 in)
705 mm (27.7 in)
1033 mm (40.7 in)
Weight - Approximate, Net Dry - Standard Configuration Without Oil, Cooling, Clutch, Compressor, A/C
407 kg (897 lb)

Aftertreatment Dimensions - Approximate

DOC Length
320 mm (12.6 in)
DOC Weight
15 kg (33 lb)
DOC Diameter
196 mm (7.7 in)
SRC Length
520 mm (20.47 in)
SCR Weight
20 kg (44 lb)
SCR Diameter
251 mm (9.88 in)


  • 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
  • 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 Iv Aftertreatment/clean Emissions Control Equipment
    • Diesel Oxidation Catalyst (DOC)
    • Selective Catalytic Reduction (SCR)
    • SCR Auxiliaries are available in a range of tanks and heated lines

Optional Equipment

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