The 6CM34DF generator set is based on the successful CM32C medium speed engine. Caterpillar Motoren designed the CM34DF to meet and exceed the CM32C reliability and lifetime expectations, while maintaining its class leading position regarding operational efficiency and reliability. The CM34DF is an ideal solution as main power for offshore production platforms and top sides. The CM34DF clean design allows fast and easy access to system and components, supporting the operation, service and maintenance simplicity. Designed to operate on gaseous fuel with methane numbers down to MN 50 and liquid fuels as MGO, MDO, heavy fuels and crude oil. The CM34DF is certified to IMO Tier II standards and meets proposed IMO Tier III emissions levels while operating in gas mode. Care and attention was paid to customers demand for a safe and reliable operation at varying engine loads and gas qualities.

Compare Models
Engine Specifications
expand / collapse icon
Minimum Rating 3600.0 kV·A 2880.0 ekW
Maximum Rating 3600.0 kV·A 2880.0 ekW
Emissions IMO Tier II IMO Tier II
Weight 128000.0 lb 64.0 t
Displacement 15317.0 in³ 251.0 l
Speed - 60 Hz 720 rpm 720 rpm
Aspiration Turbocharged Aftercooler Turbocharged Aftercooler
Stroke 18.1 in 460.0 mm
Speed - 50 Hz 750 rpm 750 rpm
Engine Control Electronic Electronic
Bore 13.39 in 340.0 mm

Ease of Installation

Standard modular design allows for ease of installation and reduced complexity - Low installation cost with auxiliary systems mounted on engine - Cooling water system with simple plug-in connections

Improved Serviceability

Large inspection openings for convenient access to core engine components - Core engine components designed for reconditioning and reuse at overhaul - Worldwide dealer network with factory-trained technicians means that parts and support are never out of reach - Segmental camshaft design - Split connecting rod design for quick piston removal -Individual camshaft segments for easy removal

6CM34DF Standard Equipment

expand / collapse icon
  • Motor-driven barring gear, fitted on engine
  • Emergency shutdown equipment with pushbutton for manual emergency stop
  • Fuel injector and integrated gas admission valve with easy service and maintenance access
  • Cylinder pressure sensors for highest operational reliability and efficiency, replacing conventional knocking sensor technology
  • Piston, rings and liners designed for operation on gas and liquid fuels