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 piston ring H 34027 is a vital sealing and wear component of the Sulzer ASL25 piston assembly, designed to maintain optimal compression and control oil consumption within the cylinder. Manufactured from high-quality, wear-resistant material, this piston ring provides effective sealing between the piston and cylinder liner under high pressure and temperature conditions. By minimizing blow-by gases, reducing friction, and ensuring efficient heat transfer from the piston to the cylinder wall, H 34027 plays a key role in combustion efficiency, emission control, and long-term durability of the engine.
The connecting rod with cover H 33001 is a critical power-transmission assembly in the Sulzer ASL25 engine, responsible for converting the linear motion of the piston into rotational motion of the crankshaft. Engineered to withstand extreme tensile and compressive forces generated during combustion, this component ensures precise bearing alignment and efficient load transfer. Its robust construction, precision machining, and balanced design minimize vibration and bearing wear, making it essential for reliable engine performance, mechanical integrity, and long service life under continuous heavy-duty operation.
The spring H 27221 is a precision-engineered elastic component used within the Sulzer ASL25 engine to provide controlled force and stable operation of associated mechanical assemblies. Designed to perform reliably under repeated loading cycles, vibration, and elevated operating temperatures, this spring maintains consistent force characteristics throughout long service intervals. Its high fatigue resistance and dimensional stability contribute to accurate component positioning, reduced mechanical wear, and dependable long-term engine operation in demanding marine and industrial environments.