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 shim with code number K 27706 is a small but vital precision spacer used in the assembly of the relief valve in the ZV40/48 engine. It fine-tunes the valve’s operational clearance and spring tension, directly influencing the opening pressure and response characteristics. Made from durable, corrosion-resistant material, the shim ensures stable valve performance and consistent system protection. Its accurate thickness control allows technicians to calibrate pressure limits with high precision, ensuring both efficiency and safety in demanding operating environments.

The relief valve coded K 27700 serves a critical safety function in the ZV40/48 diesel engine by regulating excessive pressure within the system. It automatically opens when pressure exceeds the preset limit, protecting sensitive components from potential damage. Engineered for durability and precision, the valve ensures smooth operation under high-pressure conditions while maintaining system stability. This component is essential for preserving the safety, performance, and longevity of both marine and industrial diesel engine installations.

The conical clamping half-ring, marked with code number K 27529, is a key component in securing the exhaust valve assembly of the ZV40/48 diesel engine. Its conical geometry ensures uniform pressure distribution during valve installation and operation, reducing localized stress on the valve stem and associated parts. Designed to endure high thermal loads and constant vibration, this precision-engineered ring plays a vital role in maintaining valve alignment and sealing integrity, ultimately contributing to the engine’s reliable exhaust flow and long-term durability.

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.

The conical disc with code K 21005 is an essential pressure-distribution component used with clamping pieces in the engine. Its conical shape helps evenly distribute load forces across the contact surface, reducing localized stress and enhancing mechanical stability. By improving the connection between fasteners and structural elements, this disc plays a crucial role in minimizing fatigue and prolonging the life of the engine’s critical joints.

The bolt identified as K 21002 plays a vital role in securing the clamping pieces that hold key engine components in place. Engineered for high strength and vibration resistance, this bolt withstands substantial mechanical loads during operation. Its precise threading and high-grade material ensure reliable fastening, making it indispensable for maintaining structural integrity and alignment throughout the engine’s working life.

The O‑ring with code K 21404 is a critical sealing element designed for the cylinder liner of the engine. Its primary function is to provide a leak‑proof barrier between the liner and engine block, preventing coolant and combustion gases from mixing. This component endures high temperatures and pressures, maintaining its integrity even under intense thermal cycling. A properly functioning O‑ring is essential for preserving compression and ensuring optimal engine performance over long operational periods.