Round steel bars coded EN43AE01100028 are essential raw materials used in the manufacturing and repair of MAN L21/31 engine components. These bars are made from high-grade steel with excellent machinability and strength, enabling them to be transformed into precision-engineered parts such as shafts, pins, or custom fittings. Their consistent diameter and metallurgical properties ensure that the resulting components meet the rigorous demands of marine and industrial engine performance.

The disc with code 11.01299-0138.0 is a key mechanical element in the MAN L21/31 engine, typically used in rotational or sealing assemblies. Its precise machining and material strength allow it to maintain alignment, absorb stress, or serve as a spacer or retainer depending on its location within the engine. This seemingly simple part contributes to overall engine balance, durability, and vibration control, particularly in high-speed and high-pressure operational environments.

The cover with splash tube, code 11.01213-0057-1.0, is engineered to regulate oil dispersion within the MAN L21/31 engine. By directing oil flow and preventing excess splatter, it ensures precise lubrication of internal parts while reducing unwanted buildup or leaks. This component is essential for maintaining internal cleanliness, optimizing lubrication efficiency, and contributing to the overall durability and performance of the engine.

The assembly cover with splash tube, code 11.01213-0062.0, serves as a dual-purpose component in the MAN L21/31 engine. It not only seals internal areas from external contaminants but also channels and manages oil flow to prevent splashing and ensure even lubrication. This integrated design minimizes oil loss, enhances thermal management, and supports smoother engine operation under demanding marine and industrial conditions.

The protecting cap with code 11.01251-0048.0 plays a vital role in safeguarding sensitive engine components from contamination, moisture, and mechanical damage. Used in various exposed areas of the MAN L21/31 engine, this durable cap ensures that critical connection points remain clean and functional during both operation and maintenance. Its robust design contributes to overall engine reliability and helps extend the service life of adjacent parts.

The ring with code 11.01299-0128-1.A is a general-purpose component used within the MAN L21/31 engine assembly to ensure proper alignment or sealing between parts. It may serve in various mechanical couplings where durability and precision fit are essential. Despite its small size, it contributes significantly to the integrity and longevity of the engine system.

The Teflon ring with code 11.01299-0128.A offers exceptional sealing and friction-reducing performance for the MAN L21/31 engine. Known for its excellent thermal resistance and low wear properties, Teflon ensures stable operation even under harsh conditions. This ring is typically used in dynamic sealing zones where flexibility, chemical inertness, and low maintenance are required.

The round seal ring, code 06.56936-1507-1.0, is a critical sealing component in the MAN L21/31 engine, ensuring leak-free connections in various fluid systems. Whether used in lubricating, cooling, or fuel circuits, this high-quality ring resists pressure, heat, and chemical exposure. Its reliability is key to maintaining engine cleanliness and operational efficiency during prolonged marine or industrial use.

This round seal ring provides reliable sealing at various joints within the MAN L21/31 engine. Designed to resist pressure and wear, it ensures leak-free operation and helps extend component life through stable and clean sealing.

The tie rod ensures a secure connection between the cylinder head and crankcase. In the MAN L21/31 engine, it plays a vital role in distributing internal forces evenly, preventing deformation, and maintaining engine integrity under heavy-duty conditions.