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SPECS SUMMARY

Minimum Rating255 BHP (190 bkW)
Maximum Rating400 BHP (298 bkW)
EmissionsNSPS Site Compliant Capable or non-regulated
Displacement1099 in³ (18 l)
Tough and durable, built on the industry-standard G3400 platform bring maximum uptime and low operating cost to your operation. G3408 engines meet the most demanding continuous duty gas compression applications with virtually no unscheduled downtime.Ideal applications for G3408 engines include gas lift, gas gathering, and wellhead gas compression. Cat G3408 gas engine. Ratings: 190-298 bkW (255-400 bhp) @ 1800 rpm are NSPS site compliant capable with customer-provided air-fuel ratio control and aftertreatment or available for non-regulated areas.

Specifications

Minimum Rating255 BHP (190 bkW)
Maximum Rating400 BHP (298 bkW)
EmissionsNSPS Site Compliant Capable or non-regulated
Displacement1099 in³ (18 l)
Compression Ratio9.7:1
AspirationNaturally Aspirated or Turbocharged-Aftercooled
Rotation from Flywheel EndCounterclockwise
Flywheel and Flywheel HousingSAE No. 0
Flywheel Teeth136
Weight - Dry3700 lb (1678 kg)
Cooling System14.5 gal (US) (54.9 l)
Lube Oil System - Refill12.2 gal (US) (46.2 l)
Oil Change Interval750 hours
Ignition, ProtectionAltronic III
Stroke6 in (152 mm)
Bore5.4 in (137 mm)

Benefits and Features

- 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

Large variety of factory-installed engine attachments reduces packaging time

Every engine is full-load tested to ensure proper engine performance.

GERP is a web-based program designed to provide site performance capabilities for Cat® natural gas engines for the gas compression industry. GERP provides engine data for your site's altitude, ambient temperature, fuel, engine coolant heat rejection, performance data, installation drawings, spec sheets, and pump curves.

More than 2,200 dealer outletsCat factory-trained dealer technicians service every aspect of your petroleum engineCat parts and labor warrantyPreventive maintenance agreements available for repairbefore-failure optionsS•O•SSM program matches your oil and coolant samples against Caterpillar set standards to determine:- Internal engine component condition- Presence of unwanted fluids- Presence of combustion by-products- Site-specific oil change interval

Over 60 years of natural gas engine productionOwnership of these manufacturing processes enables Caterpillar to produce high quality, dependable products.- Cast engine blocks, heads, cylinder liners, and flywheel housings- Machine critical components- Assemble complete engine

For all your petroleum power requirements, visit www.catoilandgasinfo.com

Standard Equipment

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

Optional Equipment

  • Air cleaner — dual element
  • Air inlet adapter
  • Precleaner
  • Air cleaner rain cap
  • Battery chargers
  • Charging alternators
  • Ammeter gauge
  • Ammeter gauge and wiring
  • Control mounting
  • EG3P/2301A speed control governor
  • PSG electric governor
  • PSG pneumatic governor
  • Radiators
  • Non-sparking blower fan
  • Blower fan and fan drives for customer suppliedradiators
  • ATAAC conversion
  • Aftercooler
  • Expansion tank
  • Heat exchanger
  • Flexible fittings
  • Elbows
  • Flanges
  • Rain caps
  • Mufflers
  • Exhaust manifold
  • Dual gas regulator
  • Low energy fuel carburetor
  • Low pressure gas conversion
  • Propane and natural gas valve and jet kits
  • Fuel filter
  • CSA ignition
  • Ignition ground wiring harness
  • Power supply — digital ignition system
  • Gauges and instrument panels
  • Auxiliary oil reservoir removal
  • Lubricating oil
  • Vibration isolators
  • Auxiliary drive pulleys
  • Enclosed clutch
  • Clutch support
  • Front stub shaf
  • Flywheel stub shaft
  • Pulley removal
  • 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