Cat® G3512, G3512B Industrial Gas Engine



Technical Specifications
Benefits and Features

Cat® G3512 and G3512B Industrial Gas Engines. Ratings: 589-642 bkW (790-860 bhp) @ 1200 rpm and 749-772 bkW (1004-1035 bhp) @ 1400 rpm are NSPS site compliant capable with customer-supplied aftertreatment. For specific emission information, please consult your local Cat Dealer.

Bore 170 mm (6.7 in)
Stroke 190 mm (7.5 in)
Displacement 51.8 L (3158 in³)
Aspiration Turbocharged Aftercooled (TA)
Engine Configuration Engine - Continuous
Power Rating
Minimum Power 790 HP
Maximum Power 1035 HP
Frequency 1200-1400 rpm
Engine Dimensions - Approximate
Height 2136 mm (84.1 in)
Length 3023 mm (119 in)
Weight - Net Dry 4950 kg (10913 lb)
Width 2220 mm (87.4 in)


Ratings are NSPS site compliant capable with customer-supplied aftertreatment. For specific emission information, please consult your local Cat Dealer.

Engine Design

  • Built on G3500 LE proven reliability and durability
  • Ability to burn a wide spectrum of gaseous fuels
  • Robust diesel strength design prolongs life and lowersowning and operating costs
  • Broad operating speed range at lower site air densities(high altitude/hot ambient temperatures)
  • Higher power density improves fleet management
  • Quality engine diagnostics
  • Detonation-sensitive timing control for individualcylinders

Ultra Lean Burn Technology (ULB)

ULB technology uses an advanced control system, abetter turbo match, improved air and fuel mixing, and amore sophisticated combustion recipe to provide:- Lower environmental impact- Higher return on investment- Lower operating costs- Higher work force efficiency

Advanced Digital Engine Management

ADEM A3 engine management system integrates speedcontrol, air/fuel ratio control, and ignition/detonationcontrols into a complete engine management system.ADEM A3 has improved: user interface, display system,shutdown controls, and system diagnostics.

Full Range of Attachments

Large variety of factory-installed engine attachmentsreduces packaging time.


Every Cat engine is manufactured to stringent quality standards in order to assure customer satisfaction.

World-class Product Support Offered Through Global Cat Dealer Network

  • Scheduled maintenance, including S•O•SSM sample
  • Customer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the CatIndustrial Service Distributor (ISD) program

Standard Equipment:

  • Air Inlet System
    • Axial flow air cleaner
    • Cleanable
    • Single element canister type with service indicator
  • Control System
    • ADEM A3 with integrated electronic throttle control
    • CSA certified
  • Cooling System
    • Two-stage charge air cooling
    • Thermostats and housing
    • Gear-driven jacket and aftercooler water pump
    • Stainless steel aftercooler cores
  • Exhaust System
    • Dry exhaust manifolds
    • Exhaust outlet: 200 mm I.D.
  • Flywheels And Flywheel Housings
    • SAE No. 00 flywheel
    • SAE No. 00 flywheel housing
    • SAE standard rotation
  • Fuel System
    • 7-50 psi gas supply
    • Electronic fuel metering valve
    • Gas pressure regulator, pivot valve operated
  • Ignition System
    • ADEM A3
    • Outdoor CSA certified
  • Lubrication System
    • Crankcase breather — top mounted
    • Oil cooler
    • Oil filter — RH
    • Oil pan
    • Oil sampling valve
    • Turbo oil accumulator
  • Power Take-offs
    • Front housing — two-sided
    • Front lower — LH accessory drive
  • Torsional Vibration Analysis
    • Provided through Caterpillar
  • General
    • Paint — Cat yellow
    • Crankshaft vibration damper and guard

Optional Equipment:

  • Air Inlet System
    • Round air inlet adaptors
  • Charging System
    • Battery chargers
    • CSA certified version available with
  • Cooling System
    • Mechanical joint assembly connections
  • Exhaust System
    • Flexible fittings
    • Elbows
    • Flanges
  • Fuel System
    • Gas filter
  • Instrumentation
    • Advisor display panel
    • Communications module
  • Lubrication System
    • Lubricating oil
    • Oil bypass filter
    • Air prelube pump
  • Power Take-offs
    • Front stub shaft
    • Pulleys
  • General
    • Special paint
  • Eu Certification
    • EEC DOI certification
  • Support
    • Factory commissioning

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