The closing cover, code 11.01288-0075.B, plays a vital role in sealing and protecting internal spaces of the MAN L21/31 engine. Installed at designated access points or housing openings, it prevents the escape of lubricants and the entry of contaminants, while also contributing to noise reduction and thermal stability. Engineered for pressure resistance and precise fit, this component ensures safe containment of fluids and maintains a controlled internal environment, which is essential for long-term engine efficiency and reduced maintenance requirements.
Round steel bars, code EN43AE01100028, represent the high-quality raw material basis for manufacturing and reconditioning key components of the MAN L21/31 engine. Produced from carefully selected alloy steel with excellent machinability and mechanical strength, these bars are used to create precision parts such as shafts, pins, bushings, and custom-engineered elements. Their consistent metallurgical properties and dimensional accuracy are essential for achieving tight tolerances, ensuring structural durability, and maintaining the performance standards required in demanding marine and power generation applications.
The protecting cap, code 11.01251-0048.0, is a small but highly important component in the MAN L21/31 engine, designed to shield sensitive connection points and fasteners from contamination, moisture, and mechanical damage. By sealing exposed interfaces, it helps prevent corrosion and the ingress of dirt or salt particles, which is especially critical in marine and offshore environments. Its durable construction ensures long service life and supports cleaner, safer maintenance procedures, contributing to the overall reliability and operational integrity of the engine.
The nut H 33033 is a high-strength fastening component used in the Sulzer ASL25 engine to secure critical bolted joints exposed to dynamic loads and continuous vibration. Engineered for reliable preload retention and resistance to loosening under thermal cycling and mechanical stress, this nut ensures stable and secure assembly of associated components. Its precision-formed threads and controlled material properties provide long service life, structural integrity, and dependable operation, making it an indispensable element in maintaining the overall reliability of the engine.
The O-ring H 27106 is a critical sealing element used in the Sulzer ASL25 engine to provide a leak-free interface in fluid and pressure connections. Manufactured from elastomer specifically selected for resistance to oil, temperature fluctuations, and vibration, this O-ring maintains elasticity and sealing efficiency throughout extended service life. By preventing fluid loss and protecting internal components from contamination, H 27106 plays an essential role in preserving system integrity, ensuring operational safety, and supporting consistent engine performance.
The auxiliary rocker arm shaft H 27036 is a precision-machined structural and functional component within the Sulzer ASL25 valve train system, serving as the rotational support and alignment axis for the auxiliary rocker arms. Designed to withstand continuous cyclic loading, vibration, and thermal influence, this shaft ensures smooth oscillating motion and accurate valve actuation. Its high-strength material, optimized surface finish, and strict dimensional tolerances minimize wear and maintain precise geometry over long operating intervals, contributing directly to reliable valve timing, reduced mechanical losses, and long-term engine durability.