Main Engine 4-Stroke · Main Engines (4-Stroke)
This engine operates on a 4-stroke combustion cycle, utilizing a mechanical direct injection fuel system and turbo air-to-water (TAW) aspiration for optimal performance. The Doosan Infracore 8DWXM21.9UYA, rated at 883kW at 2300 rpm, delivers 4443 Nm of torque. This engine falls under EPA engine family 8DWXM21.9UYA and is classified as Category 1 by the IMO. The 8DWXM21.9UYA was produced from 2008 to 2008. It is designed for propulsion applications and features 12 cylinders. Potential common failures include issues related to combustion, lubrication, cooling, the valve train, fuel systems, and rotating components. To maintain optimal performance, scheduled maintenance includes inspecting and replacing filters, coolers, pumps, valve gear, injectors, and examining the crankcase for wear. It is essential to consult the manufacturer's documentation for specific technical specifications.
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What our service work and the manufacturer documentation say about keeping this model running.
Review running records for exhaust-temperature spread, lubricating-oil pressure, cooling temperatures, starting behaviour, vibration and abnormal consumption trends. Inspect for fuel, lubricating-oil, cooling-water and exhaust leaks and check the condition of flexible connections, mounts, foundations and coupling or gearbox interfaces. Examine filters, coolers, pumps, valve gear, injectors and accessible combustion components in accordance with the planned-maintenance system. Check crankcase condition, oil analysis and any available bearing or vibration monitoring for developing wear. A surveyor should verify alarms, shutdowns, overspeed protection, emergency stopping arrangements and guarding of moving or hot parts as applicable to the installation. For cylinder dimensions, rotational speed, pressures, clearances, temperatures, wear limits and setting values, refer to the manufacturer documentation for the exact figure.
Carry fuel-filter and lubricating-oil-filter elements, approved seals and gaskets, injector service or replacement components, valve-train wear parts appropriate to the engine, and service parts for essential pumps. Critical installations should also hold selected sensors, relays or control modules, starting-system components, belts or flexible elements where fitted, and manufacturer-recommended bearing or cylinder-head service items. The exact onboard spare scale should follow the manufacturer, class requirements, engine redundancy and the vessel's trading pattern.
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