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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.

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    Product Specs

    Power Rating

    Maximum Power 74 HP
    Maximum Torque 234.5 lb-ft @ 1600 rpm
    Rated Speed 2200
    Minimum Power 74 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 17.0:1
    Aspiration Turbocharged
    Rotation from Flywheel End Counterclockwise
    Aftertreatment DOC+SCR

    Power Unit Dimensions

    Length 48.9 in
    Width 27.7 in
    Height 37.6 in
    Weight 792 lb

    Aftertreatment Dimensions

    Length 20 in

    Aftertreatment Dimensions*

    Diameter 5.8 in