The protecting cap, code 100100, is a compact but essential protective component used in the MAN L21/31 engine to shield exposed fittings, threaded connections, and sensitive interfaces from contamination and environmental exposure. Designed to prevent the ingress of dirt, moisture, salt particles, and other harmful substances, it helps preserve the integrity and operational reliability of critical engine components. Manufactured from durable and corrosion-resistant materials, the protecting cap provides dependable performance under harsh marine and industrial conditions. Its role in maintaining cleanliness and protecting vulnerable connection points contributes to safer maintenance operations, reduced component deterioration, and extended engine service life.
The guide bearing cap, code 302986, is a precision-machined component designed to secure and support bearing assemblies within the MAN L21/31 engine. By maintaining correct positioning and stable load distribution, it helps ensure smooth rotational movement and reliable operation of associated shafts and mechanical elements. Engineered for high mechanical strength and dimensional precision, the guide bearing cap is capable of withstanding continuous operational loads, vibration, and thermal expansion without compromising alignment or stability. Manufactured from durable, wear-resistant materials, it contributes to reduced bearing wear, improved operational efficiency, and the long-term reliability of the engine’s rotating systems.
The frame complete, code 302971, is a major structural assembly within the MAN L21/31 engine, designed to provide a stable and durable foundation for critical engine components and operating systems. Engineered to withstand substantial mechanical loads, vibration, and thermal stresses, the frame ensures precise alignment and secure support of rotating and stationary assemblies throughout engine operation. Manufactured from high-strength materials and produced with strict dimensional accuracy, it contributes significantly to the structural integrity, operational stability, and long-term reliability of the engine. By serving as the core supporting structure, the complete frame plays a vital role in maintaining efficient power transmission, reducing mechanical stress, and supporting safe and reliable engine performance in demanding marine and industrial applications.
The shaft seal K 73028 is a precision sealing element designed for bearing housing K 73011 in the Sulzer ZV40/48 engine, providing effective sealing around rotating shaft components. Its primary function is to prevent leakage of lubricants while simultaneously protecting the bearing assembly from contamination by dirt, moisture, and external particles. Engineered for operation under continuous shaft rotation, vibration, thermal variation, and lubrication exposure, the seal maintains reliable elasticity and sealing performance over long operating periods. Manufactured from high-quality elastomeric and wear-resistant materials, it offers excellent resistance to friction, pressure, and chemical degradation. Precise dimensional accuracy ensures proper fit and stable contact with the rotating shaft surface. By maintaining lubrication integrity and protecting internal bearing components, the K 73028 shaft seal contributes significantly to operational reliability, reduced maintenance requirements, and extended service life of the bearing assembly and associated engine systems.
The two-part ring K 81150 is a robust fastening and positioning component developed for exhaust piping systems in the Sulzer ZV40/48 engine. Designed as a split construction for easier installation and maintenance, it provides secure clamping and alignment of exhaust pipe connections under high-temperature operating conditions. The ring is engineered to withstand thermal expansion, vibration, pressure fluctuations, and mechanical stress commonly present in marine and stationary diesel engine exhaust systems. Manufactured from heat-resistant and corrosion-resistant materials, it maintains structural integrity and reliable fastening performance over extended service intervals. Its precision-machined contact surfaces ensure accurate positioning and even load distribution across the exhaust assembly. By supporting secure exhaust pipe connections and reducing the risk of leakage or misalignment, the K 81150 ring contributes to safe operation, efficient exhaust gas flow, and long-term durability of the exhaust system.
The gear wheel K 74126 is a precision-machined transmission component designed for the fuel transfer pump system of the Sulzer ZV40/48 engine. Its primary function is to ensure reliable transfer of rotational motion within the pump mechanism, enabling consistent fuel flow and stable pressure conditions throughout engine operation. Engineered with accurately machined tooth geometry, the gear wheel provides smooth meshing, efficient torque transmission, and reduced vibration and wear under continuous operating loads. Manufactured from high-strength, wear-resistant materials, it is capable of withstanding demanding mechanical and thermal conditions typically encountered in heavy-duty diesel engine applications. Its precise dimensional tolerances contribute to long-term operational stability and reliable pump performance. By supporting accurate fuel transfer and dependable pump operation, the K 74126 gear wheel plays an essential role in maintaining engine efficiency, reliability, and fuel system integrity.