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Gas Compression Engines

Oil and gas producers have relied on Caterpillar since the industry's earliest days. For 60 years, we've powered the petroleum business on land. Now we go with it onto the ocean, hundred of miles out, thousands of feet down.

G3412C Low Emissions Gas Compression Engine

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.

Product Details

Engine Specifications

Minimum Rating 475 bkW
Maximum Rating 475 bkW
Emissions NSPS Site Compliant Capable
Displacement 27 L
Compression Ratio 8.5:1
Aspiration Turbocharged-Aftercooled
Rotation (from flywheel end) Counterclockwise
Flywheel and Flywheel Housing SAE No. 0
Flywheel Teeth 136
Weight (dry) 2141 kg
Oil Change Interval 750 hours
Ignition, Protection Cat EIS
Stroke 152 mm
Bore 137 mm

Capacity for Liquids

Cooling System 54.9 L
Lube Oil System (refill) 170.3 L
  • Air Inlet System
    •  Air cleaner — single element with service indicator
  • Air cleaner — single element with service indicator
    • Control System
      •  Electronic governor
      •  Air/fuel ratio control on 1.0 g/bhp-hr NOx engines
    • 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
        • 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
            • 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
                • 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
                    • 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
                              • CSA ignition
                                • Ignition ground wiring harness
                                  • Power supply
                                    • Instrumentation
                                      •  Alarm module
                                      •  Gauges and instrument panels
                                    • 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
                                        • 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
                                                  • 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
                                                      • 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
                                                                  • Special paint
                                                                    Built for it