The figure reveals the vacuum clutch system. This kind of clutch employs the existing vacuum during the engine manifold to work the clutch. The vacuum clutch contains a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  , through which the ability is transmitted to the gearbox. The plate https://garrettsxyyz.wizzardsblog.com/32978000/clutch-plate-for-dummies