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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.

G3306B Gas Compression Engine

Tough and durable, built on the industry-standard G3300 platform and equipped with technology that brings performance, uptime, and low operating cost to your operation. G3306B engines meet the most demanding continuous duty gas compression applications with virtually no unscheduled downtime. Ideal applications for G3306B engines include gas lift, gas gathering, and wellhead gas compression. Cat G3306B gas engine. Ratings: 108-157 bkW (145-211 bhp) @ 1800 rpm are NSPS site compliant capable with Caterpillar or customer-provided air-fuel ratio control and aftertreatment.

Product Details

Engine Specifications

Minimum Rating 108.0 bkW
Maximum Rating 157.0 bkW
Emissions NSPS 2010
Displacement 10.5 L
Compression Ratio 10.5:1
Aspiration Naturally Aspirated or Turbocharged-Aftercooled
Rotation (from flywheel end) Counterclockwise
Flywheel and Flywheel Housing SAE No. 1
Flywheel Teeth 156
Weight (dry) 1111.0 kg
Oil Change Interval 750 hours
Ignition, Protection ADEM A4
Air/Fuel Ratio Control ADEM A4
Stroke 152.0 mm
Bore 121.0 mm

Capacity for Liquids

Cooling System 20.0 L
Lube Oil System (refill) 44.5 L
  • Air Inlet System
    •  Air cleaner — intermediate duty, dry
    •  Air cleaner rain cap (shipped loose)
    •  Service indicator
  • Control System
    •  ADEM A4
  • Cooling System
    •  Thermostats and housing — full open temperature 97°C (207°F)
    •  Jacket water pump — gear-driven, centrifugal, non-self-priming
  • Thermostats and housing — full open temperature 97°C (207°F)
    • Jacket water pump — gear-driven, centrifugal, non-self-priming
      • Exhaust System
        •  Exhaust manifolds — watercooled
        •  Exhaust elbow — dry
        •  102 mm (4 in)
        •  Three-way catalyst — 1.0 g NOx and 0.5 g NOx catalyst options
      • Flywheels & Flywheel Housings
        •  Flywheel, SAE No. 1
        •  Flywheel housing, SAE No. 1
        •  SAE standard rotation
      • Flywheel, SAE No. 1
        • Flywheel housing, SAE No. 1
          • SAE standard rotation
            • Fuel System
              •  Air/fuel ratio control
              •  Gas pressure regulator
              •  Requires 10.3-34.5 kPa (1.5-5 psi) gas
              •  Natural gas carburetor
            • Ignition System
              •  ADEM A4 ignition
            • ADEM A4 ignition
              • Lube System
                •  Crankcase breather, top mounted
                •  Oil cooler
                •  Oil filter
                •  Oil pan, full sump
                •  Oil filler and dipstick
              • Protection System
                •  The following parameters include alarm and shutdown
              • Charging Alternator
                •  24V, 35A alternator
                •  24V, 35A CSA alternator*
              • Cooling System
                •  Radiators
                •  Jacket water pump inlet adapter
              • Exhaust System
                •  Exhaust flex fitting — ANSI flange
                •  Exhaust elbow
                •  Exhaust flange — ANSI flange
              • Guards
                •  Fan guard
                •  Damper guard
              • Fan guard
                • Damper guard
                  • Ignition System
                    •  CSA certified electronics and ignition
                  • Instrumentation
                    •  Operator interface panel
                    •  Operator interface panel enclosure
                    •  15’, 20’ and 50’ interconnect harness
                  • Operator interface panel
                    • Operator interface panel enclosure
                      • 15’, 20’ and 50’ interconnect harness
                        • Starting System
                          •  Air pressure regulator
                          •  Air start silencer
                          •  Vane starter
                          •  Electric starter
                          •  Turbine starter
                        Built for it