G3408 Gas Compression Engine

Minimum Rating	255 bhp
Maximum Rating	400 bhp
Emissions	NSPS Site Compliant Capable or non-regulated
Displacement	1,099 in3
Compression Ratio	9.7:1
Aspiration	Naturally Aspirated or Turbocharged-Aftercooled

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Engine Specifications

Minimum Rating	255 bhp
Maximum Rating	400 bhp
Emissions	NSPS Site Compliant Capable or non-regulated
Displacement	1,099 in3
Compression Ratio	9.7:1
Aspiration	Naturally Aspirated or Turbocharged-Aftercooled
Rotation (from flywheel end)	Counterclockwise
Flywheel and Flywheel Housing	SAE No. 0
Flywheel Teeth	136
Oil Change Interval	750 hours
Stroke	6 in
Bore	5 in
Weight - Dry	4,500 lb
Ignition, Protection	Altronic III
Minimum Rating	255 BHP
Maximum Rating	400 BHP
Emissions	Rich Burn: Standard Emissions for Export Only
Displacement	1,099 in³
Compression Ratio	9.7:1
Aspiration	Naturally Aspirated or Turbocharged - Aftercooled
Rotation from Flywheel End	Counterclockwise
Flywheel and Flywheel Housing	SAE No. 0
Flywheel Teeth	136
Oil Change Interval	750 hours
Stroke	6 in
Bore	5 in
Length	68 in
Width	52 in
Height	61 in
Rated Speed	1,800 rpm

Capacity for Liquids

Cooling System	15 gal
Lube Oil System (refill)	12 gal
Cooling System	15 gal (US)
Lube Oil System - Refill	12 gal (US)

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

Testing

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

Gas Engine Rating Pro

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.

Product Support Offered Through Global Cat Dealer

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 80 Years of Engine Manufacturing Experience

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

Web Site

For all your petroleum power requirements, visit www.cat.com/oilandgas.

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

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