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Overview

The Cat® G3408 Industrial Gas Engine is offered in ratings ranging from 190-317 bkW (255-425 bhp) @ 1800 rpm and 249 bkW (332 bhp) @ 1500 rpm. These 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 consult your local Cat Dealer.

Power Rating

Units:
Minimum Power 255.0 bhp 190.0 bkW Less
Maximum Power 425.0 bhp 317.0 bkW Less
Frequency 1500 & 1800 rpm 1500 & 1800 rpm Less

General

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

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

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

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

G3408 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

G3408 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

Cat® Dealer Service

Buy any piece of Cat® equipment and also get the full support and commitment of your local Cat Dealer.

Contact your local dealer
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