The figure exhibits the vacuum clutch mechanism. Such a clutch utilizes the present vacuum within the motor manifold to function the clutch. The vacuum clutch contains a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  A highly trained household mechanic can tackle the task with the proper resources. https://clutch-kereta56665.atualblog.com/39251938/what-does-clutch-plate-mean