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6LT
Cummins

The Cummins 6LT series represents a robust line of inline-six cylinder, heavy-duty diesel engines designed for continuous operation in demanding applications. Built on the proven L-Series platform, these engines are engineered to deliver reliable power, exceptional durability, and high fuel efficiency for a wide range of industrial and commercial equipment .
The 6LT series offers a range of models with different power outputs and configurations to meet specific needs. The key specifications are summarized in the table below.
Key Note on Power & Configuration: Power output is closely tied to the engine's configuration code (e.g., T, TA, TAA for intercooling) and target application (prime power vs. standby). Models are available for both Prime Power (continuous duty) and Standby/Generator applications, with corresponding power ratings .
The 6LT engine is a versatile power solution engineered for reliability in critical systems:
Fire Fighting & Pump Drives: Specifically designed as a prime mover for fire pump systems and industrial water pumps, with configurations meeting NFPA20 standards .
Power Generation: A dependable choice for prime and standby diesel generator sets, commonly found in models like the 6LTAA8.9-G2 .
Heavy-Duty Vehicles & Equipment: Provides durable power for medium to heavy-duty trucks, buses, construction machinery, and specialized vocational vehicles .
Marine & Industrial: Suitable for various industrial power units and marine auxiliary applications .
Advanced Combustion System: Features an advanced four-valve cylinder head and a centrally located fuel injector with a symmetrical combustion chamber. This design ensures more uniform air-fuel mixing, more complete combustion, and lower emissions .
Robust & Durable Architecture: Built with heavy-duty components for long service life. Key features include replaceable wet cylinder liners, forged steel articulated pistons, and a reinforced cylinder block design that significantly reduces noise and vibration .
Flexible Aspiration & Fuel Systems: Available in multiple turbocharged and intercooled configurations to optimize performance for different altitudes and duty cycles. Can be equipped with precise mechanical or electronic fuel systems and governors .
Modern Emission Compliance: The platform can be configured with advanced aftertreatment systems (like Selective Catalytic Reduction - SCR) to meet stringent global emission standards, including EU Stage V .

The Cummins 6LT series represents a robust line of inline-six cylinder, heavy-duty diesel engines designed for continuous operation in demanding applications. Built on the proven L-Series platform, these engines are engineered to deliver reliable power, exceptional durability, and high fuel efficiency for a wide range of industrial and commercial equipment .
The 6LT series offers a range of models with different power outputs and configurations to meet specific needs. The key specifications are summarized in the table below.
Key Note on Power & Configuration: Power output is closely tied to the engine's configuration code (e.g., T, TA, TAA for intercooling) and target application (prime power vs. standby). Models are available for both Prime Power (continuous duty) and Standby/Generator applications, with corresponding power ratings .
The 6LT engine is a versatile power solution engineered for reliability in critical systems:
Fire Fighting & Pump Drives: Specifically designed as a prime mover for fire pump systems and industrial water pumps, with configurations meeting NFPA20 standards .
Power Generation: A dependable choice for prime and standby diesel generator sets, commonly found in models like the 6LTAA8.9-G2 .
Heavy-Duty Vehicles & Equipment: Provides durable power for medium to heavy-duty trucks, buses, construction machinery, and specialized vocational vehicles .
Marine & Industrial: Suitable for various industrial power units and marine auxiliary applications .
Advanced Combustion System: Features an advanced four-valve cylinder head and a centrally located fuel injector with a symmetrical combustion chamber. This design ensures more uniform air-fuel mixing, more complete combustion, and lower emissions .
Robust & Durable Architecture: Built with heavy-duty components for long service life. Key features include replaceable wet cylinder liners, forged steel articulated pistons, and a reinforced cylinder block design that significantly reduces noise and vibration .
Flexible Aspiration & Fuel Systems: Available in multiple turbocharged and intercooled configurations to optimize performance for different altitudes and duty cycles. Can be equipped with precise mechanical or electronic fuel systems and governors .
Modern Emission Compliance: The platform can be configured with advanced aftertreatment systems (like Selective Catalytic Reduction - SCR) to meet stringent global emission standards, including EU Stage V .
