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The intermediate piece coded K 31513 is a crucial connecting element within the vibration damping system of the Sulzer ZV40/48 diesel engine. Positioned between the crankshaft and the main damper unit, it ensures optimal transfer of rotating mass forces while isolating harmful vibrations. Designed from high-strength materials with precise tolerances, this component helps reduce mechanical stress on engine bearings and structural components. Its role is essential in extending engine lifespan and maintaining smooth and quiet operation, particularly under heavy load conditions.

Friday, 14 November 2025 11:19

MAN L21/31 – Pick-up (Code P50908-05)

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The pick-up unit, code P50908-05, is a sensing component in the MAN L21/31 engine that detects rotational speed or position, often used in conjunction with the governor system. It translates mechanical motion into electrical signals, feeding real-time data to electronic controls. This input is vital for accurate engine regulation, synchronization, and diagnostics in demanding applications like marine propulsion and power generation.

The regulating device, code P50902-09, works in conjunction with the governor to finely control fuel injection timing and quantity in the MAN L21/31 engine. Precision-built and responsive, this component plays a pivotal role in optimizing combustion, reducing emissions, and improving responsiveness. It is a key contributor to the engine’s adaptability to fluctuating operational demands.

The governor and its drive mechanism, code P50901-44, are essential for regulating engine speed in the MAN L21/31. This assembly ensures stable operation by automatically adjusting fuel delivery in response to engine load variations. By maintaining a consistent RPM under changing conditions, the governor safeguards performance, fuel efficiency, and protects against overspeed, which is especially important in marine propulsion and generator applications.

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