The complete operating piston, marked with code number K 34000, is a major actuator component in the control system of the ZV40/48 diesel engine. Assembled with precision and designed for high-pressure performance, this piston converts fluid energy into mechanical motion, facilitating the operation of various engine control functions. Built from high-strength, wear-resistant materials, it withstands the rigorous conditions of continuous operation, including pressure surges and thermal expansion. Its dependable action ensures accurate responses within the engine’s control loop, directly impacting performance, efficiency, and operational safety.