G3408B Gas Engine

Cat® G3408 Industrial Gas Engine

Overview

Cat® G3408 Industrial Gas Engine. Ratings: 190-317 bkW (255-425 bhp) @ 1800 rpm and 249 bkW (332 bhp) @ 1500 rpm are NSPS site compliant capable with customer-supplied aftertreatment. Some ratings also have standard emission settings available for export only. For specific emission information, please consult your local Cat Dealer.

Emissions
Ratings are NSPS site compliant capable with customer-supplied aftertreatment. Some ratings also have standard emission settings available for export only. For specific emission information, please refer to the engine spec sheet.
Engine Design
  • Improved reliability and durability
  • Ability to burn a wide spectrum of gaseous fuels
  • Robust diesel strength design prolongs life and lowers owning and operating costs
  • Broad operating speed range
Full Range of Attachments
Large variety of factory-installed engine attachments reduces packaging time
Quality
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
Emissions
Ratings are NSPS site compliant capable with customer-supplied aftertreatment. Some ratings also have standard emission settings available for export only. For specific emission information, please refer to the engine spec sheet.
Engine Design
  • Improved reliability and durability
  • Ability to burn a wide spectrum of gaseous fuels
  • Robust diesel strength design prolongs life and lowers owning and operating costs
  • Broad operating speed range
Full Range of Attachments
Large variety of factory-installed engine attachments reduces packaging time
Quality
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

General

Bore
137 mm (5.4 in)
Stroke
152 mm (6.0 in)
Displacement
18 L (1099 in³)
Aspiration
Naturally Aspirated (NA), Turbocharged Aftercooled (TA)
Engine Configuration
Engine - Continuous
Bore
137 mm (5.4 in)
Stroke
152 mm (6.0 in)
Displacement
18 L (1099 in³)
Aspiration
Naturally Aspirated (NA), Turbocharged Aftercooled (TA)
Engine Configuration
Engine - Continuous

Power Rating

Minimum Power
255.0bhp
Maximum Power
425.0bhp
Frequency
1500 & 1800 rpm
Minimum Power
255HP
Maximum Power
425HP

Engine Dimensions (Approximate. Final dimensions dependent on selected options)

Height
1758 mm (69.2 in)
Width
1563 mm (61.5 in)
Length
1756 mm (69.1 in)

Engine Dimensions - Approximate

Weight - Net Dry
2245 kg (4950 lb)
Width
1563 mm (61.5 in)
Height
1758 mm (69.2 in)
Length
1756 mm (69.1 in)

Standard/Optional Features

Standard Equipment:

  • Air Inlet System
    • Air cleaner — single element with service indicator
  • Control System
    • Governor — Woodward PSG mechanical
    • Governor control — positive locking
  • Cooling System
    • Thermostats and housing
    • Jacket water pump
    • Aftercooler water pump
    • Aftercooler core
  • Exhaust System
    • Watercooled exhaust manifolds
    • Dry exhaust elbow
  • Flywheel & Flywheel Housing
    • SAE No. 0 flywheel
    • SAE No. 0 flywheel housing
    • SAE standard rotation
  • Fuel System
    • Gas pressure regulator
    • Natural gas carburetor
  • Ignition System
    • Digital ignition system
  • Instrumentation
    • Service meter
  • Lube System
    • Crankcase breather — top mounted
    • Oil cooler
    • Oil filter — RH
    • Auxiliary oil reservoir
    • Rear sump oil pan
    • Oil filler in valve cover and dipstick — RH
  • Mounting System
    • Engine supports
  • Protection System
    • Shutoffs
  • General
    • Paint — Cat yellow
    • Crankshaft vibration damper and drive pulleys
    • Lifting eyes

Optional Equipment:

  • Air Inlet System
    • Air cleaner — dual element
    • Air inlet adapter
    • Precleaner
    • Air cleaner rain cap
  • Charging System
    • Battery chargers
    • Charging alternators
    • Ammeter gauge
    • Ammeter gauge and wiring
    • Control mounting
  • Control System
    • EG3P/2301A speed control governor
    • PSG electric governor
    • PSG pneumatic governor
  • Cooling System
    • Radiators
    • Non-sparking blower fan
    • Blower fan and fan drives for customer suppliedradiators
    • ATAAC conversion
    • Aftercooler
    • Expansion tank
    • Heat exchanger
  • Exhaust System
    • Flexible fittings
    • Elbows
    • Flanges
    • Rain caps
    • Mufflers
    • Exhaust manifold
  • Fuel System
    • Dual gas regulator
    • Low energy fuel carburetor
    • Low pressure gas conversion
    • Propane and natural gas valve and jet kits
    • Fuel filter
  • Ignition System
    • CSA ignition
    • Ignition ground wiring harness
    • Power supply — digital ignition system
  • Instrumentation
    • Gauges and instrument panels
  • Lube System
    • Auxiliary oil reservoir removal
    • Lubricating oil
  • Mounting System
    • Vibration isolators
  • Power Take-offs
    • Auxiliary drive pulleys
    • Enclosed clutch
    • Clutch support
    • Front stub shaf
    • Flywheel stub shaft
    • Pulley removal
  • Protection System
    • Gas valves
  • Starting System
    • Air starting motor
    • Electric air start control
    • Air pressure regulator
    • Air silencer
    • Electric starting motor — single 24-volt
    • Starting aids
    • Battery sets (24-volt dry), cables, and rack

See how G3408 compares against frequently compared products

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Engine - Continuous
Maximum Power
425.0 bhp
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