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Thursday, 23 October 2025 06:27

MAN L21/31; DISC (Code 11.01299-0138.0)

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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 lower spring plate, identified by code K 27502, is an essential support element for the inlet valve spring assembly in the ZV40/48 engine. It provides a stable base that maintains the correct spring tension, ensuring consistent valve timing and proper seating. This component must endure repeated cycles of compression and rebound, and it is built from durable materials to resist fatigue. Its role is crucial in ensuring that the inlet valve operates efficiently, helping the engine achieve optimal air intake and combustion performance.

The valve turning device with code K 27527 plays a critical role in prolonging the life of the exhaust valve in the ZV40/48 engine. By gradually rotating the valve during operation, this device distributes thermal and mechanical loads evenly across the valve face and seat, reducing localized wear and preventing carbon buildup. This results in better sealing, improved engine breathing, and extended service intervals, making it a vital element in maintaining reliable exhaust valve function over time.

The valve spindle, code number K 27521, is a core component of the exhaust system in the ZV40/48 diesel engine. It acts as the movable shaft that opens and closes the exhaust valve in synchronization with the engine cycle. Crafted from heat-resistant, wear-resistant materials, this spindle is designed to withstand extreme combustion temperatures and mechanical stress. Its precision engineering ensures tight sealing and smooth operation, directly affecting exhaust flow efficiency and overall engine performance.

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