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.

Power Rating

Maximum Power 115HP
Maximum Torque 310lb-ft @ 1400 rpm
Rated Speed 2200
Minimum Power 100HP

Emission Standards

Emissions U.S. EPA Tier 4 Final


Engine Configuration In-Line 4, 4-Stroke-Cycle Diesel
Bore 3.9in
Stroke 4.3in
Displacement 207.5in³
Compression Ratio 17.0:1
Aspiration Turbocharged Aftercooled (TA)
Rotation from Flywheel End Counterclockwise
Aftertreatment DOC+SCR

Power Unit Dimensions

Length 40.7in
Width 27.7in
Height 49.3in
Weight 897lb

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
  • 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