C4.4 (60 Hz)

C4.4 Generator Set

C4.4 (60 HZ) 72-100 kW Diesel Generator models have the flexibility to give all customers reliable energy for their own standby and prime applications.

C4.4 Open Set Rear Right


Producing reliable power from 72 to 100 ekW at 60 Hz, our C4.4 diesel generator sets designed to ISO 8528-5 transient response requirements. All C4.4 generator sets meet EPA Stationary Emergency (Tier 3) emissions standards.Caterpillar is leading the power generation marketplace with Power Solutions engineered to deliver unmatched flexibility, expandability, reliability, and cost-effectiveness.Electric Power

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

R-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
  • Image may not be a representative of actual product

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


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

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

World Wide 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
  • Optional Equipment
  • Specs
  • Docs

Standard Equipment

  • Air Inlet System
    • Air cleaner; light duty with disposable element
  • Cooling System
    • Radiator and cooling fan with guards
    • Coolant drain line with valve
    • Fan drive, battery charging alternator drive
    • Caterpillar extended life coolant
  • Control Panel
    • GCCP 1.3
  • 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 8-hour fuel tank
  • Generator
    • Voltage regulator (single phase sensing)
    • 12 Leads
    • IP23 Protection
    • Circuit breaker, IEC, 3 pole, mounted in tower panel
    • Segregated low voltage (AC/DC) wiring panel
    • Tower panel, IP22, bottom cable entry
  • Governing System
    • Mechanical and electrical governing system - model dependent
  • Lube System
    • Oil drain line with valve
    • Lubricating oil
  • Mounting System
    • Termination points for coolant and lube oil drain lines
    • Includes lifting provision and drag points
    • Captive linear vibration isolators between base and engine-generator
  • Starting/Charging System
    • 24V battery with rack and cables
    • Batteries
  • General
    • Engine and alternator pre-paint, Caterpillar yellow

Optional Equipment

  • Alternator System
    • Permanent magnet excitation (PMG)
    • R Frame auxilliary winding
    • Anti-condensation heater
    • R Frame auxilliary winding
    • Quadrature droop kit
    • LC Frame alternator with coastal insulation protection
    • 3 phase sensing
  • Circuit breakers
    • Circuit breaker upgrades - 4 Pole circuit reaker to 250A, 400A and 630 A
  • Cooling System
    • Low coolant level shutdown
    • Coolant heater
    • Low coolant temperature alarm
  • Control Panel Options
    • GCCP 1.3
    • Control panel heater
    • Earth leakage (2 wire only)
    • Panel mounted audible alarm
    • Volt free contacts
    • Emergency stop with key
    • Battery charger
    • Overload shutdown via breaker
    • Speed adjust potentiometer
    • Voltage adjust potentiometer
  • Enclosures
    • Sound attenuated Level 2 enclosure
    • Sound attenuated Level 1 (galv)
    • Rental pack - CAE rental option only
  • European Certifications
    • Upgrade to STD set for CE
  • Fuel System
    • Skidbase for CALG enclosure sets
    • Low fuel level alarm
    • Open set narrow tankbase
    • Low fuel level shutdown
    • Compact skidbase for open set
    • High fuel level alarm
    • Bunded fuel tank
  • Global Certifications
    • Certification for CIS
  • Mounting Options
    • Electronic governor
    • Industrial silencer
    • External single point lift - enclosure
    • Battery removal
    • Silencer installation kit
  • Special Packing/Inspectons for Shipment
    • PGS Test report @ 0.8 power factor
    • PGS Test report @ 1.0 power factor
  • General - Accessories / Miscellaneous
    • Packing case - compact set
    • Packing case - canopied set
    • Stone guards/rad trans flange



Long Name:
C4.4 Generator Set
C4.4 (60 Hz)

Generator Set Specifications

Maximum Rating
100 ekW
Minimum Rating
72 ekW
Emissions/Fuel Strategy
U.S. EPA Cert., Tier 3
110 to 480 Volts
60 Hz
1800 rpm
Duty Cycle
Standby, Prime

Engine Specifications

Engine Model
Cat® C4.4
4.1 in / 105 mm
5 in / 127 mm
268.5 in³ / 4.4 l
Compression Ratio
16.2:1, 17.25:1, 18.2:1 or 18.3:1
Fuel System
Direct Injection or Common Rail
Governor Type

Generator Set Dimensions

Length - Maximum
75.8 in / 1925 mm
Width - Maximum
44.1 in / 1120 mm
Height - Maximum
53.6 in / 1361 mm