D40 GC Generator Set

Producing reliable power of 40 ekW at 60 Hz, our D40 GC diesel generator sets designed to ISO 8528-5 transient response requirements. All D40 GC generator sets meet EPA Stationary Emergency (Tier 3) emissions standards.

Cat Generator Set Package

  • Cat generator set packages have been fully prototype tested
  • Accepts 100% block load in one step and meets NFPA 110 loading requirements
  • Conform to ISO 8528-5 steady state and transient response requirements

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

M-Frame Alternator

  • Superior motor starting capability minimizes need for oversizing alternator
  • Designed to match performance and output characteristics of Cat diesel engines
  • Robust Class H insulation

GCCP 1.2 Control Panel

  • User-friendly interface and navigation
  • Scalable system to meet a wide range of installation requirement
  • Expansion modules and site-specific programming for specific customer requirements

Cooling System

  • Designed to operate in standard ambient temperatures up to 55°C (131°F)
  • Contact your Cat Dealer for specific ambient and altitude capabilities


  • UL 2200 Listed
  • ULC Certification Available

One Safe Source

  • Components used in the generator set are selected based on seamless design integration to provide the optimum performance
  • The generator set is fully assembled at a Caterpillar facility following our quality guidelines
  • Each generator set package is tested before leaving the Caterpillar facility
  • Cat product support, including dealer service, parts and warranty covers the entire Cat power system

Worldwide Product Support

  • Cat dealers have over 1,800 dealer branch stores operating in 200 countries
  • Your local Cat dealer provides extensive post-sale support, including maintenance and repair agreements

Standard Equipment

  • IBC seismic and wind Certifications
Air Inlet System
  • Air cleaner
  • Cartridge type air filter
Circuit breakers
  • Breakers (100% UL rated)
  • Second circuit breaker box
  • 3-Pole 100% rated
  • Power terminal strip
Charging System
  • NFPA battery charger UL10A 120VAC
Control Panel
  • GCCP 1.2 Control panel
Exhaust System
  • Stub pipe, gaskets, raincap and SAE exhaust flange for customer use - shipped loose
Fuel System
  • Standard open set fuel tank/base supplied base, formed steel with single wall integral 24-hour fuel tank
Control Panels
  • NFPA110 bundle includes:
  • WSS1 Low coolant level shut down
  • WCA1 Low coolant temperature alarm
  • FSS Low fuel level alarm & indication panel circuitry required when sub-base tank is selected
  • PBC10NU NFPA battery charger
  • Oil temperature gauge and sender
  • A Coolant heater, remote annunciator or 0.8 power factor test may be required depending on the application
  • PAA1 Panel mounted audible alarm
  • Remote E-stop button
  • Volt free contacts genset run and common alarm
  • Discrete I/O module
  • Audible alarm
  • Ground fault relay
  • Remote annunciator module
  • Overload shutdown via breaker
  • Low coolant level shutdown
  • Fuel level reading
  • Protective devices:
  • Low coolant temperature alarm
Cooling System
  • Caterpillar extended life coolant
  • Radiator and cooling fan with guards
  • Coolant drain line with valve
  • Fan drive, battery charging alternator drive
  • Radiator stone guard
  • 12 Leads
Governing System
  • Mechanical and electrical governing system - model dependent
Lube System
  • Lubricating oil
  • Oil drain line with valve
  • Engine and alternator pre-paint, Caterpillar yellow
Starting/Charging System
  • Batteries
  • 24V battery with rack and cables

Additional information

Offering Type

Generator Set Specifications - Maximum Rating

40 ekW

Generator Set Specifications - Minimum Rating

40 ekW

Generator Set Specifications - Emissions/Fuel Strategy

U.S. EPA Cert., Tier 3, SCAQMD Compliant

Generator Set Specifications - Voltage

208 to 600 Volts

Generator Set Specifications - Frequency

60 Hz

Generator Set Specifications - Speed

1800 rpm

Generator Set Specifications - Duty Cycle


Engine Specifications - Engine Model

C4.4, In-line 4, 4-cycle diesel

Engine Specifications - Bore

105 mm ( 4.1 in )

Engine Specifications - Stroke

127 mm ( 5 in )

Engine Specifications - Displacement

4.4 l ( 269 in )

Engine Specifications - Compression Ratio


Engine Specifications - Aspiration


Engine Specifications - Fuel System

Common Rail

Engine Specifications - Governor Type

Mechanical, ADEM™A4

Generator Set Dimensions - Length - Maximum

1962 mm ( 77.2 in )

Generator Set Dimensions - Width - Maximum

1100 mm ( 43.3 in )

Generator Set Dimensions - Height - Maximum

1220 mm ( 48 in )

Generator Set Dimensions - Dry Weight - Genset (maximum)

838 kg ( 1847 lb )

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