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Kubota D902 Diesel Original Engine for mini excavators track loaders

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  • D902

  • Kubota

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The Kubota D902 is a highly efficient, 3-cylinder, liquid-cooled diesel engine renowned for its exceptional power density, fuel efficiency, and compact design. Part of Kubota's esteemed Super Mini Series, this versatile power plant delivers robust performance for a wide range of industrial and mobile equipment. With various models available—including naturally aspirated, turbocharged, and advanced electronically controlled versions—the D902 series is engineered to meet diverse application needs while complying with stringent global emission standards like EPA Tier 4, EU Stage V, and China NR IV .

Key Specifications & Models


Parameter Specification
Engine Model D902 Series (e.g., D902-K, D902-E3B, D902-TE4)
Configuration In-line, 3-Cylinder, 4-Stroke
Aspiration Naturally Aspirated (D902-K, D902-E3B) / Turbocharged (D902-TE4)
Displacement 0.898 L
Bore × Stroke 72.0 mm × 73.6 mm
Rated Power Up to 18.5 kW (24.8 HP) @ 3200-3600 rpm (varies by model)
Max. Torque Up to 72.2 Nm (53.2 lb-ft) @ 2400 rpm (D902-TE4 Turbocharged)
Combustion System Indirect Injection (IDI) / TVCR (Three Vortex Common Rail) for D902-K
Weight Approx. 72 kg (159 lb) - 75 kg (165 lb)
Emission Compliance EPA Tier 4, EU Stage V, China NR IV, China Smoke Category III

Note: Specifications can vary depending on the specific model variant and application configuration.


Primary Applications & Equipment

The D902 engine is engineered to be a compact and reliable power source for a diverse range of machinery, including:

  • Compact Construction Equipment: Ideal for mini excavators (under 2 tons), mini track loaders, and trenchers .

  • Turf & Landscape Machinery: A perfect fit for zero-turn mowers, tractors, and other turf-care equipment where low noise and minimal vibration are critical .

  • Utility Vehicles & Industrial Equipment: Powers utility vehicles, welders, and can be adapted for use in generator sets and other industrial applications .

 Core Technologies & Key Features

  • Advanced Combustion Technology: The revolutionary TVCR (Three Vortex Common Rail) system in the D902-K model integrates Kubota's E-TVCS combustion chamber with a unique common rail fuel system. This achieves zero visible black smoke during start-up and acceleration, and improves fuel efficiency by approximately 5% compared to conventional models .

  • Electronic Control & Smart Connectivity: The electronically controlled D902-K variant features a CAN-based ECU, enabling seamless communication with the host machine's controller. This facilitates advanced functionalities like automation, unmanned operations, hybridization, and integrated intelligence control for optimized performance .

  • Compact & Durable Design: Despite its high power density, the engine maintains a small footprint. Kubota's original casting technology for cooling water passages between cylinders ensures superior heat management, endurance, and reliable performance .

  • Easy Installation & Upgradability: Designed with the same external dimensions, mount positions, and PTO (Power Take-Off) as conventional models, the D902 series allows for straightforward machinery upgrades without requiring costly machine re-designs .

  • Low Noise and Vibration: Features like a half-float valve cover and optimized piston design contribute to quiet and smooth operation, enhancing operator comfort .


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