The bush with code number K 73021 is a vital component within the cooling water pump assembly of the Sulzer ZV40/48 diesel engine. Acting as a guide and wear-resistant surface for the rotating shaft, this bush minimizes friction and helps ensure smooth operation of the pump. Made from durable, corrosion-resistant materials, it withstands continuous exposure to water and thermal cycles. Its reliability directly impacts the cooling efficiency and overall health of the engine, making it essential for long-term marine and industrial use.