G3412C Low Emissions Gas Compression Engine

Minimum Rating	637 bhp
Maximum Rating	637 bhp
Emissions	NSPS Site Compliant Capable
Displacement	1,649 in3
Compression Ratio	8.5:1
Aspiration	Turbocharged-Aftercooled

Request a Quote Download Brochure

Engine Specifications

Minimum Rating	637 bhp
Maximum Rating	637 bhp
Emissions	NSPS Site Compliant Capable
Displacement	1,649 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	2,800 lb
Ignition, Protection	Cat EIS
Minimum Rating	637 BHP
Maximum Rating	637 BHP
Emissions	Rich Burn: EPA NSPS Site Compliant Capable with Caterpillar Supplied AFRC and Customer Supplied Aftertreatment
Displacement	1,649 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	96 in
Width	63 in
Height	77 in
Rated Speed	1,800 rpm

Capacity for Liquids

Cooling System	15 gal
Lube Oil System (refill)	45 gal
Cooling System	15 gal (US)
Lube Oil System - Refill	45 gal (US)

Engine Design

- Proven reliability and durability- Ability to burn a wide spectrum of gaseous fuels- Robust diesel strength design prolongs life and lowersowning and operating costs- Broad operating speed range

Emissions

- Meets U.S. EPA Spark Ignited Stationary NSPSEmissions for 2007/8- 2.0 g/bhp-hr NOx emission versions available- Larger turbocharger and aftercooler provide leanair/fuel mixture, low emissions, and excellent fuelconsumption

Lean Burn Engine Technology

Lean-burn engines operate with large amounts of excessair. The excess air absorbs heat during combustionreducing the combustion temperature and pressure,greatly reducing levels of NOx. Lean-burn design alsoprovides longer component life and excellent fuelconsumption.

Caterpillar Electronic Ignition System (EIS)

Detonation sensitive timing protects the engine againstdetonation damage. Higher voltage and longer sparkduration mean easier starts, fewer misfires, andsmoother operation. Diagnostic codes help pinpointcylinder and component of interest. Spark plugmaintenance codes identify spark plug condition

Ease of Operation

- Deep sump oil pan has a larger capacity for normal750-hour oil change intervals- High-strength pan and rails for excellent mounting andstability- Side covers on block allow for inspection of internalcomponents

Full Range of Attachments

Large variety of factory-installed engine attachmentsreduces packaging time

Testing

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

Gas Engine Rating Pro

GERP is a web-based program designed to provide siteperformance capabilities for Cat®natural gas enginesfor the gas compression industry. GERP providesengine 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 everyaspect of your petroleum engineCat parts and labor warrantyPreventive maintenance agreements available for repairbefore-failure optionsS•O•SSM program matches your oil and coolant samplesagainst 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 enablesCaterpillar to produce high quality, dependable products.- Cast engine blocks, heads, cylinder liners, and flywheelhousings- 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 on 1.0 g/bhp-hr NOx engines
Cooling System
- Thermostats and housing
- Jacket water pump
- Aftercooler water pump
- Aftercooler core
Exhaust System
- Watercooled exhaust manifolds
- Dry exhaust elbow
Flywheels & Flywheel Housings
- SAE No. 0 flywheel
- SAE No. 1 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 detonationsensitive 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

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
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 — electric air start control
- Air pressure regulator
- Air silencer
- Electric starting motors — single 24-volt
- Starting aids
- Battery sets
General
- Special paint