The determine shows the vacuum clutch system. This kind of clutch utilizes the prevailing vacuum while in the motor manifold to work the clutch. The vacuum clutch is made of a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  Usually place the flat aspect in the clutch plate https://clutch-plate59246.madmouseblog.com/13503507/new-step-by-step-map-for-clutch-kereta