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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


    Producing reliable power from 4400 to 4850 kVA at 50 Hz, our 3612 diesel generator sets are made to meet your mission critical, continuous, standby and prime applications. We've designed each to ISO 8528-5 transient response requirements and to accept 100 per cent rated load in one step. The generator set is certified for low fuel consumption.

    Generator Set Specifications

    Minimum Rating 4400 kVA 4400 kVA Less
    Maximum Rating 4850 kVA 4850 kVA Less
    Emissions/Fuel Strategy Low Fuel Consumption Low Fuel Consumption Less
    Frequency 50 Hz 50 Hz Less
    Speed 750 & 1000 rpm 750 & 1000 rpm Less
    Duty Cycle Prime, Continuous Prime, Continuous Less

    Engine Specifications

    Engine Model 3612 V-12,4-Stroke Water-Cooled Diesel 3612 V-12,4-Stroke Water-Cooled Diesel Less
    Bore 11.0 in 280.0 mm Less
    Stroke 11.8 in 300.0 mm Less
    Displacement 13524.0 in³ 222.0 l Less
    Compression Ratio 13:01 13:01 Less
    Aspiration TA TA Less
    Fuel System Direct unit injection Direct unit injection Less
    Governor Type Generator Set Monitoring System (GMS) Generator Set Monitoring System (GMS) Less

    Generator Set Dimensions

    Length - Maximum 404.0 in 10261.7 mm Less
    Width - Maximum 99.62 in 2530.3 mm Less
    Height - Maximum 156.6 in 3977.7 mm Less
    Dry Weight - Genset (maximum) 112690.0 lb 51230.0 kg 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
    • Heat exchanger for single circuit
    • Front mounted turbos
    • Heating aids
    • Three-bundle oil cooler
    • Water temperature regulator
    • Cooling system aids
    • Auxiliary water pump
    • Jacket water thermostats
    • Expansion tank

    Exhaust System
    • 457 mm (18 in) Cat bolt pattern
    • Dry, gas tight, exhaust manifold
    • Flexible exhaust fittings
    • Weld flange and related hardware
    • Includes adapter, flexible exhaust fitting

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

    Mounting System
    • Damper, torsional vibration
    • Engine and generator mounting
    • Isolator
    • Spring type vibration isolator
    • Vertically restrained
    • Non-vertically restrained

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

    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

    Fuel System
    • Fuel priming pump
    • Simplex or duplex
    • Duplex primary fuel strainer
    • Fuel system connections

    Generator System
    • Custom generator per generator data sheet completed by dealer
    • 3 Phase, six Leads, WYE
    • Class F insulation
    • Busbar connections
    • Winding temperature detectors
    • Anti-condensation space heaters

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

    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
    • Pressure reducing valve
    • Compressed air flex hose
    • Turbine type air starters
    • Redundant Air Starters

    Application Centre

    Explore valuable resources for generator sizing, specification, and training materials. SpecSizer evaluates load types, collects data, and organises it to help you select the generator set that's best for you. Find product comparisons, technical data, product sizing, and more using our technical information portal (TIP) specifically created for consultants, architects, engineers, and owners.

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    Why Choose Cat® Electric Power?

    Caterpillar offers a comprehensive variety of electric power systems, customised to fit your needs. Our specialised systems deliver high power and performance in industries across the globe. With Caterpillar, you get outstanding manufacturing quality, expert support, and the essential tools and applications to complete any project.

    Learn More About Electric Power

    EMCP 4 Generator Set Controls

    Cat generator sets provide a complete factory-built solution with fully featured standard and advanced controls. Optional accessories enhance the capabilities of the genset package-mounted control system.

    Learn More