G3412C

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Overview

Tough and durable, built on the industry-standard G3400 platform bring maximum uptime and low operating cost to your operation. G3412C Low Emissions (LE) engines meet the most demanding continuous duty gas compression applications with virtually no unscheduled downtime.Ideal applications for G3412C (LE) engines include gas lift, gas gathering, and wellhead gas compression. Cat G3412C (LE) gas engine. Ratings: 475 bkW (637 bhp) @ 1800 rpm are NSPS site compliant capable with customer-provided aftertreatment.

Engine Specifications

Units:
Minimum Rating 637.0 bhp 475.0 bkW Less
Maximum Rating 637.0 bhp 475.0 bkW Less
Emissions NSPS Site Compliant Capable NSPS Site Compliant Capable Less
Displacement 1649.0 in3 27.0 L Less
Compression Ratio 8.5:1 8.5:1 Less
Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled Less
Rotation (from flywheel end) Counterclockwise Counterclockwise Less
Flywheel and Flywheel Housing SAE No. 0 SAE No. 0 Less
Flywheel Teeth 136 136 Less
Weight (dry) 4720.0 lb 2141.0 kg Less
Oil Change Interval 750 hours 750 hours Less
Ignition, Protection Cat EIS Cat EIS Less
Stroke 6.0 in 152.0 mm Less
Bore 5.4 in 137.0 mm Less

Capacity for Liquids

Cooling System 14.5 gal 54.9 L Less
Lube Oil System (refill) 45.0 gal 170.3 L Less

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 PC-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.catoilandgasinfo.com

G3412C Standard Equipment

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

G3412C Optional Equipment

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

Cat® Dealer Service

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