G3408C Low Emissions Gas Compression Engine

Minimum Rating	425 bhp
Maximum Rating	425 bhp
Emissions	NSPS Site Compliant Capable or Non-regulated
Displacement	1,099 in3
Compression Ratio	8.5:1
Aspiration	Turbocharged-Aftercooled

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Engine Specifications

Minimum Rating	425 bhp
Maximum Rating	425 bhp
Emissions	NSPS Site Compliant Capable or Non-regulated
Displacement	1,099 in3
Compression Ratio	8.5:1
Aspiration	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	2,041 lb
Ignition, Protection	Cat EIS
Minimum Rating	425 BHP
Maximum Rating	425 BHP
Emissions	Rich Burn: EPA NSPS Site Compliant Capable with Caterpillar Supplied AFRC and Customer Supplied Aftertreatment
Displacement	1,099 in³
Compression Ratio	8.5:1
Aspiration	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	69 in
Width	62 in
Height	69 in
Rated Speed	1,800 rpm

Capacity for Liquids

Cooling System	15 gal
Lube Oil System (refill)	39 gal
Cooling System	15 gal (US)
Lube Oil System - Refill	39 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

Emissions

Meets U.S. EPA Spark Ignited Stationary NSPS Emissions for 2007/08

Lean Burn Engine Technology

Lean-burn engines operate with large amounts of excess air. The excess air absorbs heat during combustion reducing the combustion temperature and pressure, greatly reducing levels of NOx. Leanburn design also provides longer component life and excellent fuel consumption.

Cat® Electronic Ignition System (EIS)

Detonation sensitive timing protects the engine against detonation damage. Higher voltage and longer spark duration mean easier starts, fewer misfires, and smoother operation. Diagnostic codes help pinpoint cylinder and component of interest. Spark plug maintenance codes identify spark plug condition

Ease of Operation

• Deep sump oil pan has a larger capacity for normal 750-hour oil change intervals• Side covers on block allow for inspection of internal components

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 outletsCaterpillar factory-trained dealer technicians service every aspect of your petroleum engineCat parts and labor warrantyPreventive maintenance agreements available for repair-before-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
- Electronic governor
- Air/fuel ratio control
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 (1.5 to 5 psi gas supply required)
- Natural gas carburetor
Ignition System
- Cat Electronic Ignition System (EIS) with detonation sensitive timing
Instrumentation
- Service meter
Lube System
- Crankcase breather — top mounted
- Oil cooler
- Oil filter — RH
- Oil pan — deep sump
- Oil filler — RH in valve cover and RH dipstick
Mounting System
- Engine supports
Protection System
- Detonation sensitive timing control
- Shutoff
General
- Paint — Cat yellow
- Crankshaft vibration damper and pulleys
- Lifting eyes
- Cylinder block inspection covers

Air Inlet System
- Air cleaner — two-stage
- Air inlet adapter
- Precleaner
- Air cleaner rain cap
Charging System
- Battery chargers
- Charging alternators
- Ammeter gauge
- Ammeter gauge and wiring
- Control mounting
Cooling System
- Radiators
- Blower fan and fan drives for customer suppliedradiators
- Expansion tank
- Heat exchangers
Exhaust System
- Flexible fittings
- Elbows
- Flanges
- Rain caps
- Mufflers
- Exhaust manifold — instrument holes at each port
Fuel System
- Dual gas regulator
- Carburetor kits
- Fuel filter
Ignition System
- CSA ignition
- Ignition ground wiring harness
- Power supply
Instrumentation
- Alarm module
- Gauges and instrument panels
Mounting System
- Vibration isolators
Power Take-offs
- Auxiliary drive pulleys
- Enclosed clutch and clutch support
- Front stub shaft
- Flywheel stub shaft
- Pulley removal
Protection System
- Gas valves
- Status control box interconnect wiring harness
Starting System
- Air starting motor
- Air pressure regulator
- Air silencer
- Electric start control
- Electric starting motors — single 24V
- Starting aids
- Battery sets — (24V dry), cables, and rack
General
- Special paint