Product Overview
The Cummins 6BT5.9 is a 5.9-liter, inline-six-cylinder, turbocharged diesel engine that has set the industry standard for medium-duty power. This complete assembly typically includes the long block (engine block, crankshaft, pistons, connecting rods, cylinder head with valves), along with core accessories like the gear-driven fuel injection pump, water pump, oil cooler, and often a turbocharger. It is engineered to meet or exceed original Cummins specifications, providing a direct, drop-in replacement for a vast range of applications, from Komatsu, Kobelco, and Hitachi excavators to power generation sets and marine auxiliaries. It delivers the perfect balance of torque, horsepower, and legendary Cummins longevity.
Key Features & Benefits
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Legendary Cummins Durability: Built with a robust cast-iron block and cylinder head, forged steel crankshaft, and proven Bosch or Cummins fuel system components for unparalleled service life in the toughest conditions.
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Complete & Ready-to-Run Assembly: Arrives as a fully assembled core engine. Saves weeks of downtime compared to sourcing and rebuilding individual components. Simply mate with your existing manifolds, alternator, starter, and other application-specific accessories.
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Proven Industrial Performance: Delivers a robust torque curve ideal for heavy-load applications like excavating, pumping, and power generation. Known for excellent fuel economy and low emissions for its class.
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Simplified Repowering & Installation: The standardized design of the 6BT5.9 makes it one of the most straightforward engines to install in a wide variety of equipment frames, reducing installation complexity and cost.
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Global Parts & Service Support: As one of the most ubiquitous industrial engines ever made, genuine Cummins and high-quality aftermarket parts are available worldwide, ensuring easy maintenance and repair for decades to come.
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Cost-Effective Power Solution: Offers a superior total cost of ownership compared to less proven or newer, more complex engine platforms. Its rebuildability extends its life virtually indefinitely.
Technical Specifications (Typical)
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Engine Model: Cummins 6BT5.9 / QSB5.9 (Industrial)
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Configuration: Inline 6-Cylinder, 4-Stroke, Turbocharged Diesel
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Displacement: 5.9 Liters (359 cu in)
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Aspiration: Turbocharged
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Fuel System: Direct Injection, Bosch VE or Inline Pump
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Emissions: Pre-Tier/ Tier 1 compliant for many industrial applications.
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Output: Varies by rating (e.g., 130-230 HP). Specify your required horsepower/power rating.
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Core Dimensions: Compact design for versatile installation.
Frequently Asked Questions (FAQ)
Q1: Is this a brand new engine or a remanufactured one?
A: Please confirm with the seller. Listings can be for brand new, OEM-grade assemblies or high-quality, certified remanufactured engines. Both are complete assemblies. Remanufactured units are rebuilt to exacting standards with new or re-machined core components.
Q2: What accessories are included with the engine assembly?
A: A standard “assembly” or “long block” typically includes core engine-mounted components: gear housing, fuel injection pump, water pump, oil cooler, turbocharger (if applicable), and engine mounts. It usually excludes the starter, alternator, manifolds, flywheel, and other application-specific parts from your old engine, which are transferred over.
Q3: Will this 6BT5.9 engine fit my specific machine ?
A: The 6BT5.9 was a very common OEM engine. Yes, it is the direct replacement for many models. However, you must confirm the exact engine model (e.g., 6BT5.9-C, specific horsepower rating) and configuration (flywheel housing, rotation, accessory mounts) that matches your machine’s original factory specifications to ensure a perfect fit.
Q4: What is the warranty?
A: Reputable suppliers offer a substantial warranty ( 500 hours) on complete engine assemblies. Always inquire about the specific warranty terms before purchasing.
Q5: Do you provide technical support for installation?
A: Many suppliers can provide installation manuals, technical drawings, and phone support. For complex repowering projects, consulting with a qualified diesel mechanic or the equipment manufacturer is highly recommended.
Don’t Settle for Less Than Legendary Power. Invest in a Cummins 6BT5.9 Engine Assembly – The Heart Your Equipment Deserves. Contact Us for Specifications and Pricing Today!
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