Sleeves with code EN170H13 are precision-engineered components used in the MAN L21/31 engine to provide wear protection, alignment, or sealing between moving and stationary parts. Produced from high-quality alloy steel, these sleeves offer excellent resistance to abrasion, thermal stress, and mechanical loading. By maintaining correct clearances and protecting base components from wear, they play a vital role in extending component life, ensuring smooth operation, and reducing maintenance intervals in demanding marine and industrial environments.
The socket with code 2197020-4.0 serves as a precision connection or engagement element in the MAN L21/31 engine assembly, typically used for mounting, coupling, or servicing operations. Manufactured to tight dimensional tolerances, it ensures secure fitment and accurate force transmission between mating components. Its durable construction allows it to withstand repeated mechanical loads and service cycles, contributing to safe maintenance procedures and consistent operational performance.
The pipe with code 2101793-2.0 is an essential fluid-transfer component within the MAN L21/31 engine, used for conveying lubricating oil, cooling water, fuel, or air between critical engine systems. Designed to withstand high pressure, temperature fluctuations, and continuous vibration, this pipe ensures reliable and uninterrupted flow under demanding operating conditions. Its precise routing and robust material selection help maintain system efficiency, reduce the risk of leaks, and support long-term engine reliability in marine and power-generation applications.
The hydraulic tie rod with code 0743814-5.3 is a precision tensioning component used in the MAN L21/31 engine to secure the cylinder head and crankcase assembly with uniform clamping force. By applying controlled hydraulic pressure during tightening, the tie rod ensures even load distribution, compensates for thermal expansion, and minimizes distortion under high combustion pressures. This system enhances sealing reliability, reduces mechanical stress, and significantly improves engine durability, particularly during long operating cycles and frequent load variations.
The engine frame, code D51101-07.0, serves as the main load-bearing structure of the MAN L21/31 engine, supporting the crankcase, cylinders, and auxiliary systems. Engineered for exceptional strength and stiffness, it distributes mechanical loads evenly across the engine and absorbs dynamic forces generated during operation. The robust design of the frame is critical for maintaining engine geometry, reducing structural fatigue, and ensuring stable performance during continuous heavy-duty service in marine and industrial environments.
The cylinder crankcase with code 11.01200-3593-1.L forms the core structural foundation of the MAN L21/31 engine, housing the crankshaft, main bearings, and lower sections of the cylinder assembly. Designed to withstand high combustion forces, torsional loads, and continuous thermal stress, the crankcase ensures precise alignment of all rotating components. Its rigid construction is essential for minimizing vibration, maintaining lubrication integrity, and guaranteeing long-term reliability in demanding marine propulsion and power generation applications.
The thermostat housing with code 11.41100-0626.0 forms the protective and functional enclosure for the cooling water thermostat in the MAN L21/31 engine. This robust housing ensures proper coolant routing, pressure containment, and leak-free operation within the engine’s cooling circuit. Engineered for high thermal resistance and mechanical strength, the thermostat housing plays a vital role in maintaining precise temperature control, safeguarding internal components, and ensuring reliable engine operation under continuous load conditions.
The intermediate piece with code 11.41199-0008.0 serves as a precision connecting element within the MAN L21/31 engine assembly, providing accurate alignment and secure mechanical integration between adjoining components. Designed to withstand vibration, thermal expansion, and dynamic loading, this component ensures correct geometry of the engine system and smooth transfer of forces between connected structures. Its dimensional accuracy and material integrity are essential for long-term operational stability and low-maintenance performance in demanding marine and industrial environments.
The cooling water thermostat with code 11.06011-0073.0 is a critical temperature-regulating component in the MAN L21/31 engine, responsible for maintaining the engine within its optimal operating temperature range. By automatically controlling coolant flow based on thermal conditions, the thermostat ensures rapid warm-up, stable combustion performance, and effective protection against overheating. Its precise response characteristics directly contribute to improved fuel efficiency, reduced mechanical wear, and extended service life — especially under continuous heavy-duty marine and power-generation operation.
The seal ring with code 06.56190-0739-1.0 is a precision sealing element used throughout the MAN L21/31 engine to protect critical systems from fluid leakage and pressure loss. Designed to withstand aggressive temperatures, pressure fluctuations, and chemical exposure, this ring provides long-term elastic sealing performance in lubricating oil, fuel, and cooling circuits. Its reliability is essential for preserving system cleanliness, reducing wear, and ensuring continuous, trouble-free engine operation in demanding marine and industrial environments.