The coupling piece K 72103 is a precision mechanical transmission component designed for the cylinder lubricating pump K 72101 in the Sulzer ZV40/48 engine. Its primary function is to transmit rotational motion and torque from the drive mechanism to the lubrication pump while maintaining accurate alignment and reliable power transfer. Engineered from high-strength, wear-resistant materials, the coupling piece is capable of withstanding continuous cyclic loading, vibration, and demanding operating conditions commonly encountered in marine and industrial diesel engines. Precision machining ensures accurate fitment, smooth torque transmission, and reduced mechanical stress on connected components. By ensuring dependable pump operation and consistent lubrication delivery, the K 72103 coupling piece contributes to efficient cylinder lubrication, reduced component wear, improved engine reliability, and extended service life.