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Cat Diesel Engine

  • Reliable, rugged, durable design
  • Field-proven in thousands of applications worldwide
  • Four-stroke-cycle diesel engine combines consistent performance and excellent fuel economy with minimum weight
  • Generator

  • Matched to the performance and output characteristics of Cat engines
  • Industry leading mechanical and electrical design
  • Industry leading motor starting capabilities
  • High Efficiency
  • World Wide Product Support

    Cat dealers provide extensive post-sale support including maintenance and repair agreements. Cat dealers have over 1,800 dealer branch stores operating in 200 countries. The Caterpillar S•O•S℠ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

    Full Range of Attachments

    Wide range of bolt-on system expansion attachments, factory designed and tested Flexible packaging options for easy and cost effective installation


    Caterpillar is leading the power generation marketplace with Power Solutions engineered to deliver unmatched flexibility, expandability, reliability, and cost-effectiveness.

    Generator Set Specifications

    Minimum Rating 3550 kVA 3550 kVA Less
    Maximum Rating 5375 kVA 5375 kVA Less
    Frequency 50 Hz 50 Hz Less
    Speed 750 & 1000 RPM 750 & 1000 RPM Less

    Generator Set Configurations

    Emissions/Fuel Strategy Low Fuel Consumption Low Fuel Consumption Less

    Engine Specifications

    Engine Model 3612 V-12,4-Stroke Water-Cooled Diesel 3612 V-12,4-Stroke Water-Cooled Diesel Less
    Compression Ratio 13:1 13:1 Less
    Aspiration TA TA Less
    Governor Type Generator Set Monitoring System (GMS) Generator Set Monitoring System (GMS) Less
    Fuel System Direct unit injection Direct unit injection Less
    Bore 11.0 in 280.0 mm Less
    Displacement 1127.0 in³ 18.5 l Less
    Stroke 11.8 in 300.0 mm Less
    Total Displacement 13524.0 in³ 222.0 l Less

    3612 (50 Hz) Standard Equipment

    Air Inlet System
    • Aftercooler, fresh water, corrosion resistant coated (air side)
    • Air inlet shutoff
    • Air cleaner
    • Breather, crankcase, top-mounted
    • Turbocharger, watercooled, engine oil lubricated

    Cooling System
    • Engine coolant water drains
    • Front mounted turbos
    • Three-bundle oil cooler
    • Water temperature regulator
    • Jacket water thermostats

    Exhaust System
    • 457 mm (18 in) Cat bolt pattern
    • Dry, gas tight, exhaust manifold
    • Includes adapter, flexible exhaust fitting

    Fuel System
    • Simplex or duplex

    Generator System
    • Custom generator per generator data sheet completed by dealer

    Governor System
    • UG actuator

    Lube System
    • Centrifugal oil filters with single shutoff
    • Service side engine mounted on cylinder block inspection covers
    • Wet oil sump. Includes engine-driven main lubrication & oil pumps, Oil Lines and Oil Pan
    • Oil filler and dipstick
    • Oil pressure regulating valve
    • Crankcase explosion relief valves

    Mounting System
    • Damper, torsional vibration
    • Engine and generator mounting

    Starting / Charging System
    • Vane type air starter
    • Two motors, engine mounted at rear, on left side
    • Air silencer
    • Line group for single point custom connection

    • Paint, Caterpillar yellow
    • Gear driven pumps: Fuel, Oil, Jacket water, Aftercooler / Oil cooler water

    3612 (50 Hz) Optional Equipment

    Air Inlet System
    • Soot filter
    • Air cleaner louver assembly
    • Vertical support bracket
    • Heavy duty air cleaner
    • Air inlet adapter
    • Boost control valve

    Cooling System
    • Heat exchanger for single circuit
    • Heating aids
    • Cooling system aids
    • Auxiliary water pump
    • Expansion tank

    Exhaust System
    • Flexible exhaust fittings
    • Weld flange and related hardware

    Fuel System
    • Fuel priming pump
    • Duplex primary fuel strainer
    • Fuel system connections

    Generator System
    • 3 Phase, six Leads, WYE
    • Class F insulation
    • Busbar connections
    • Winding temperature detectors
    • Anti-condensation space heaters

    Governor System
    • Electronic / actuators
    • Digital programmers
    • Battery backup / Power supply
    • 230 UA
    • 723 Plus
    • EGB actuator

    Lube System
    • Oil pan drain valve
    • Lube ANSI adapter (Emergency connection)

    Mounting System
    • Isolator
    • Spring type vibration isolator
    • Vertically restrained
    • Non-vertically restrained

    Starting / Charging System
    • Pressure reducing valve
    • Compressed air flex hose
    • Turbine type air starters
    • Redundant Air Starters

    • Custom paint colors

    Precision Sizing at Your Fingertips.

    Caterpillar Electric Power is excited to introduce you to our latest generator set sizing software, Cat® Electric Power SpecSizer. Considering factors such as site conditions, load characteristics and required performance, SpecSizer provides accurate and timely technical data, robust load models and optimized algorithms to assist in specifying a properly sized generator set to best meet your power needs.

    Learn More

    Power Systems Technical Information Portal

    Find product comparisons, technical data, product sizing and more using our technical information portal specifically created for consultants, architects, engineers, and owners.

    Learn More