The determine displays the vacuum clutch mechanism. This sort of clutch uses the prevailing vacuum during the engine manifold to operate the clutch. The vacuum clutch is made up of a reservoir, non-return valve, vacuum cylinder with piston, and solenoid valve.  Their reason is to attach or disconnect the motor https://hectormuyad.pages10.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-clutch-kereta-68414044