G3306B Oilfield Gas Generator Set

G3306B Oilfield Gas Generator Set

Production of oil and gas in remote oilfields can be a challenge when utility power is not available. The Caterpillar product line of oilfield gas generator sets provides the ideal solutions for this challenge. Engines are designed to run on low to no-cost well site gas without sacrificing on performance. These generator sets allow customers to significantly reduce fuel cost and avoid the expense and logistics of diesel fuel deliveries. Plus, they are designed to withstand the harsh conditions in the oilfield and feature a heavy-duty construction ideal for loading and unloading operations.Cat generator sets are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty.G3306B oilfield gas generator set. Ratings: 110 - 135 ekW (138 - 170 kVA) @ 50 and 60 Hz (1500 and 1800 rpm). Configurations available to meet NSPS emission standards in non-attainment areas and configurations available for non-regulated areas.

  • Maximum Rating 135 ekW (170 kVA)

  • Minimum Rating 110 ekW (138 kVA)

  • Fuel CNG, LNG, field gas, natural gas

  • Emissions/Fuel Strategy NSPS or non-regulated

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Product Specifications


Engine Specifications

  • Aspiration Turbocharged-Aftercooled

  • Bore 4.76in

  • Displacement 640in³

  • Emissions/Fuel Strategy NSPS or non-regulated

  • Engine Control and Protection ADEM A4

  • Frequency - Speed 50/60 Hz (1500/1800 rpm)

  • Generator SR4B

  • Generator Set Control EMCP 4.3 (4.4 optional)

  • Manifold Type Watercooled

  • Maximum Rating 135 ekW (170 kVA)

  • Minimum Rating 110 ekW (138 kVA)

  • Stroke 5.98in

Capacity for Liquids

  • Cooling System - Engine 5gal (US)

  • Fuel CNG, LNG, field gas, natural gas

  • Lube Oil System - Refill 12gal (US)


  • Height 73.1in

  • Length 145.8in

  • Weight 7716lb

  • Width 60.2in



Standard Equipment

  • Air cleaner — intermediate duty, dry

  • Air cleaner rain cap

  • Air cleaner service Indicator

  • High ambient radiator design for gas fuel applications

  • Side-by-side aftercooler and jacket water core

  • Metal top and bottom tanks

  • Coolant drain

  • Fan and belt guard

  • Coolant level sensor

  • Exhaust manifolds — water cooled

  • Exhaust elbow and flex fitting — 127 mm (5 in)

  • Residential grade muffler

  • Gas pressure regulator — requires 82.7-172.4 kPa (12-25 psi) gas

  • Natural gas carburetor

  • Rated for continuous duty — 25% oversize

  • Class H insulation

  • Permanent magnet

  • Random wound

  • 240 VAC space heater

  • Coastal insulation protection

  • IP23 protection

  • Cat Digital Voltage Regulator

  • Electronic governing ADEM A4

  • Electronic diagnostics and fault logging

  • Momentary start/stop logic

  • High temperature braided engine harness with 70-pincustomer connector and service tool connector

  • Crankcase breather, top-mounted

  • Oil filter, spin-on, left-hand service

  • Dipstick, left-hand service

  • Oil pump — gear-driven

  • Oil cooler

  • Heavy-duty welded steel base designed for the oilfield

  • Designed to accommodate a drop-over enclosure

  • Space claims for makeup tank and coalescing filter

  • Base design optimized for loading, transport, and unloading

  • The following parameters include alarm and shutdown:

  • Jacket water heater

  • 24V starting motor

  • 24V, 45-amp charging alternator

Optional Equipment

  • Three-way catalyst

  • Critical grade muffler

  • Muffler mounting structure

  • Air-fuel ratio control

  • Coalescing filter, heavy-duty for wellhead gas