The locking spring washer, code 06.16169-0004.2, is a critical fastening element designed to secure bolted connections in the MAN L21/31 engine against loosening caused by vibration and dynamic operating loads. Its spring-like geometry creates a constant preload and additional friction between fastening surfaces, ensuring that bolts maintain their required clamping force during long operating cycles. Manufactured from high-strength, fatigue-resistant materials, the washer maintains its elasticity even under repeated thermal and mechanical stress. Though compact in size, this component plays a vital role in safeguarding engine assemblies, supporting structural integrity, and enhancing the reliability of marine and stationary diesel engine installations.

The O-ring H 82409 is a precision elastomer sealing component widely used within the Sulzer ASL25 engine to provide leak-free sealing in fluid and pressure interfaces. Engineered to maintain elasticity and resistance to oil, fuel, and temperature fluctuations, this O-ring ensures dependable sealing between mating components. Its compact design allows easy installation into dedicated sealing grooves, where controlled compression provides a durable barrier against leakage and contamination. Despite its small size, the H 82409 O-ring is essential for maintaining system pressure stability, protecting internal engine systems, and supporting long-term operational reliability.

The GACO-ring H 74140 is a specialized sealing element used in the Sulzer ASL25 engine to ensure reliable sealing in rotating or dynamically loaded assemblies. Designed to combine the flexibility of elastomer sealing with enhanced mechanical stability, the GACO-ring maintains tight sealing performance even under fluctuating pressures, temperature variations, and vibration. Its precisely engineered profile enables consistent contact pressure between mating surfaces, preventing leakage and maintaining system integrity. By supporting effective sealing in demanding operating conditions, the H 74140 GACO-ring plays an important role in protecting internal engine components and maintaining efficient system operation.

The component N 73104, often referred to as a protective “cocoon,” serves as a structural shielding element within the Sulzer ASL25 engine assembly. Its function is to protect sensitive mechanical components from contamination, mechanical damage, and external environmental influences during operation. Manufactured with robust material and precise geometry, this protective enclosure helps maintain stable working conditions for adjacent components while minimizing exposure to vibration and debris. By safeguarding critical internal elements, the N 73104 cocoon contributes to improved reliability, reduced wear, and the long-term durability of the engine’s mechanical systems.

The plug screw, code 06.08042-0142.B, is a durable closing element designed to seal threaded openings and service channels within the MAN L21/31 engine. Its precision-cut thread and carefully finished contact surfaces guarantee secure installation and leak-free performance under demanding operating conditions. Typically used to close drilling points, lubrication passages, or auxiliary ports, the plug screw allows easy access during inspection or servicing while ensuring reliable re-sealing after reinstallation. Manufactured from high-strength materials with protective surface treatment, it offers excellent resistance to corrosion, vibration, and thermal stress, supporting long-term engine reliability and operational safety.

The closing screw, code 11.07294-0004.0, serves as a reliable sealing and fastening element used to close auxiliary openings, service ports, or inspection points within the MAN L21/31 engine. Precisely machined threads and sealing surfaces ensure secure installation and pressure-tight closure even in environments exposed to vibration, thermal cycling, and mechanical stress. Designed for repeated assembly and disassembly, the closing screw enables efficient inspection and maintenance procedures without compromising sealing performance. Its robust material properties and corrosion-resistant finish ensure durability and dependable operation throughout extended service life in marine and stationary diesel engine applications.

The gasket, code 06.56936-2355.0, is a vital sealing component used to ensure tight and reliable connections between mating surfaces within the MAN L21/31 engine. Positioned between flanged or bolted interfaces, it compensates for minor surface irregularities and maintains leak-free operation under varying pressure and temperature conditions. Manufactured from high-quality materials resistant to heat, mechanical stress, and engine fluids, the gasket preserves sealing integrity throughout long service intervals. By preventing the escape of lubricants or cooling media and blocking the ingress of contaminants, this essential element supports safe engine operation, protects internal components, and contributes to overall system efficiency in demanding marine and power-generation environments.

The seal H 74133 is an essential sealing element used within the Sulzer ASL25 engine to prevent leakage and maintain pressure integrity in fluid systems. Engineered from high-performance sealing material, it resists temperature fluctuations, oil exposure, and mechanical stress typical of heavy-duty engine operation. Its precise geometry ensures a tight interface between components, safeguarding internal systems from contamination and fluid loss. The reliability of the H 74133 seal is crucial for maintaining stable operating conditions, improving system efficiency, and supporting the long-term operational integrity of the engine.

The sliding sleeve N 73119 is a precision guiding element within the Sulzer ASL25 engine designed to facilitate controlled axial movement between interacting mechanical components. Manufactured from wear-resistant material and machined to tight tolerances, it provides a smooth sliding interface that minimizes friction and mechanical wear. Operating under continuous load, vibration, and thermal influence, the sleeve ensures proper alignment and stable motion of the associated mechanism. By maintaining accurate positioning and reducing stress on adjacent components, the N 73119 sliding sleeve contributes to the long-term reliability and durability of the engine’s mechanical systems.

The O-ring H 16192 is a precision elastomer sealing component used in the Sulzer ASL25 engine to ensure leak-free sealing in fluid and pressure interfaces. Designed to maintain elasticity and dimensional stability under varying temperatures, vibration, and exposure to oil or fuel, it provides a reliable barrier between mating surfaces. Its compact design allows it to fit precisely within grooves and sealing channels, ensuring effective compression and long-lasting sealing performance. Despite its small size, the H 16192 O-ring plays a vital role in protecting engine systems from leakage and contamination, thereby supporting reliable operation and extended service intervals.