CG137-12 Oilfield Gas Generator Set

Production of oil and gas in the oilfield 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 sacrifice 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. CG137-12 oilfield gas generator set. Rating: 400 ekW (500 kVA) @ 60 Hz (1800 rpm). Configurations available to meet NSPS emission standards in non-attainment areas.

Engine Specifications

Maximum Rating 400 ekW (500 kVA)
Minimum Rating 400 ekW (500 kVA)
Emissions/Fuel Strategy U.S. EPA Tier II Nonroad Mobile Emissions Certified. Available for NSPS compliance via Design to Order process
Aspiration Turbocharged-Aftercooled
Manifold Type Watercooled
Bore 5.39in
Stroke 6.46in
Displacement 1770in³
Engine Control and Protection ADEM A4
Generator Set Control EMCP 4.4 Control Panel
Generator SR4B
Frequency - Speed 60 Hz (1800 rpm)

Capacity for Liquids

Fuel CNG, LNG, field gas, natural gas
Lube Oil System - Refill 45gal (US)
Cooling System - Engine 15gal (US)


Length 230in
Width 89in
Height 102.3in
Weight 19731lb

Standard Equipment

  • Air Inlet System
    • Air cleaner — intermediate duty, dry
    • Air cleaner rain cap
    • Air cleaner service Indicator
  • Cooling System
    • High ambient radiator design for gas fuel applications
    • Stacked aftercooler and jacket water core
    • Metal top and bottom tanks
    • Coolant drain
    • Fan and belt guard
    • Coolant level sensor
  • Exhaust System
    • Exhaust manifolds — water cooled
    • Exhaust elbow and flex fitting — 127 mm (5 in)
    • Residential grade muffler
    • Three-way catalyst
    • Muffler mounting structure
  • Fuel System
    • Gas pressure regulator — requires 10.3-34.5 kPa (1.5-5 psi) gas
    • Natural gas carburetor
    • Air Fuel Ratio Control
  • Generator
    • Rated for continuous duty — 10% oversize
    • Class H insulation
    • Permanent magnet
    • Random wound
    • 240 VAC space heater
    • Coastal insulation protection
    • IP23 protection
    • Cat Digital Voltage Regulator
  • Control System
    • Electronic governing ADEM A4
    • Electronic diagnostics and fault logging
    • Momentary start/stop logic
    • High temperature braided engine harness with 70-pin customer connector and service tool connector
  • Lube System
    • Crankcase breather, top-mounted
    • Oil filter, spin-on, left-hand service
    • Dipstick, left-hand service
    • Oil pump — gear-driven
    • Oil cooler
  • Mounting System
    • Heavy-duty welded steel base designed for the oilfield
    • Base design optimized for loading, transport, and unloading
  • Protection System
    • The following parameters include alarm and shutdown:
  • General
    • Jacket water heater
    • 24V starting motor
    • 24V, 45-amp charging alternator

Optional Equipment

  • Fuel System
    • 1 micron gas filter