G3306B NA Gas Compression Engines

Gas Compression Engines G3306B

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Key Specs

Maximum Rating
211 BHP
157 bkW
NSPS 2010
NSPS 2010
638 in³
10.5 l


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 Specifications for G3306B

Maximum Rating 211 BHP 157 bkW
Emissions NSPS 2010 NSPS 2010
Displacement 638 in³ 10.5 l
Minimum Rating 145 BHP 108 bkW
Compression Ratio 10.5:1 10.5:1
Aspiration Naturally Aspirated or Turbocharged-Aftercooled Naturally Aspirated or Turbocharged-Aftercooled
Rotation from Flywheel End Counterclockwise Counterclockwise
Flywheel and Flywheel Housing SAE No. 1 SAE No. 1
Flywheel Teeth 156 156
Weight - Dry 2450 lb 1111 kg
Oil Change Interval 750 hours 750 hours
Ignition, Protection ADEM A4 ADEM A4
Air/Fuel Ratio Control ADEM A4 ADEM A4
Stroke 6 in 152 mm
Bore 4.8 in 121 mm
Cooling System 5.25 gal (US) 20 l
Lube Oil System - Refill 11.9 gal (US) 44.5 l

G3306B Standard Equipment

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

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

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

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

G3306B Optional Equipment

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


  • Fan guard
  • Damper guard

Ignition System

  • CSA certified electronics and ignition


  • 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

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G3306B NA Gas Compression Engines

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