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The intake and exhaust valves in the MAN L21/31 engine regulate the flow of air and exhaust gases into and out of the combustion chamber. Designed to endure extreme heat and pressure, these valves (code H27050) ensure efficient combustion cycles and optimal engine breathing. Proper maintenance and timely replacement of valves are crucial to sustaining engine power and fuel efficiency.

The timing gear or chain in the MAN L21/31 engine synchronizes the rotation of the crankshaft and camshaft, ensuring precise valve timing for optimal combustion and engine performance. Durable and precisely engineered, the timing mechanism (code H33041) plays a critical role in maintaining engine efficiency and preventing mechanical failure due to mistimed valve operation.

The oil pump in the MAN L21/31 engine plays a vital role in circulating lubricating oil throughout the engine, ensuring all moving parts receive adequate lubrication to minimize wear and prevent overheating. Built to withstand high pressure and continuous operation, the oil pump (code H27154) is essential for maintaining engine health, reducing friction, and prolonging the engine’s lifespan.

The pump impeller with drive shaft, bearing code number K 74123, forms the dynamic heart of the Sulzer ZV40/48's fuel transfer pump. The impeller is tasked with propelling the fuel, while the drive shaft transmits power from the motor to the rotating assembly. Together, they generate the pressure and flow necessary for efficient fuel distribution. Constructed from robust, wear-resistant materials, these components are engineered for high efficiency, minimal vibration, and extended service life, playing a vital role in the consistent performance of the fuel system.

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