G3512 Gas Generator Sets, Oil & Gas

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Emissions/Fuel StrategyU.S. EPA Tier 2 S.I. Non Road Mobile
AspirationTurbocharged-2 stage after cooled
Bore6.7 in (170 mm)
Stroke7.5 in (190 mm)
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.


Emissions/Fuel StrategyU.S. EPA Tier 2 S.I. Non Road Mobile
AspirationTurbocharged-2 stage after cooled
Bore6.7 in (170 mm)
Stroke7.5 in (190 mm)
Displacement3173 in³ (52 l)
Engine Control and ProtectionElectronic (ADEM 4)
Generator Set ControlEMCP 4.4 Control Panels
Length196 in (4979.3 mm)
Width84.8 in (2154.4 mm)
Height89.6 in (2277.1 mm)
Frequency - Speed60 Hz
Fuel SystemElectronic Fuel Control Valve

Benefits and Features

  • Meets U.S. EPA Large SI Tier 2.*
  • Genset designed to be paired with the Cat® energy storage system for a complete drilling factory solution
  • Engine design built on the G3500 platform with proven reliability and durability
  • EMCP 4.4 shipped standard • Jacket water and lube oil heaters shipped standard
  • Rugged package base designed for oil fields

Lean air/fuel mixture provides best available emissions and fuel efficiency for engines of this bore size

ADEM™4 (A4) engine management system integrates speed control, air/fuel ratio control, and ignition/detonation controls into a complete engine management system. The ADEM™4 (A4) has an improved: user interface, display system, shutdown controls, and system diagnostics.

Large variety of factory-installed package attachments reduces packaging time

Every genset is full-load tested to ensure proper package performance.

Standard Equipment

  • Air cleaner, intermediate duty, with service indicator and air filter differential pressure sensors
  • Jacket water outlet- right hand flange connection
  • Jacket water pump, gear driven, centrifugal, non - priming
  • Dry exhaust manifold
  • 10-35 kPag gas supply
  • EMCP 4.4
  • ADEM™4
  • Crankcase breather - top mounted
  • Prelube pump
  • Simplex oil filter
  • Standard Oil Pan

Optional Equipment

  • Pre-cleaners
  • Charging alternator 24V, 35A
  • Left hand flanged jacket water connection
  • Exhaust weld flange
  • Gas train
  • Electric prelube
  • Air prelube
  • Oil level regulator
  • Oil drain
  • Barring group
  • Right hand air starter