The determine displays the vacuum clutch system. This kind of clutch makes use of the present vacuum inside the engine manifold to work the clutch. The vacuum clutch is made up of a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  To know how a clutch works, it https://clutch-kereta50470.thezenweb.com/details-fiction-and-clutch-kereta-71015987