The knob identified by code K 32378 is a user-interface component used for the manual engagement or release of the arrestor pin in the Sulzer ZV40/48 engine's barring system. This small yet crucial part allows operators to control the locking mechanism of the rotating shaft, ensuring safe operation during manual turning or when the engine is stationary. Engineered for ergonomic handling and durability, the knob simplifies an essential safety function in the daily handling of the engine.