For work I've already rebuilt two laboratory vacuum pumps, one direct drive and one belt driven. Those have an inlet and an exhaust opening, as well as a ballast adjustment. So that got me curious, how does the vacuum pump of our diesel work? I don't see any "inlet" to suck air from, nor do I see an outlet. I'm guessing that the inlet would be the one that goes to the main vacuum line to the brake booster. Was this a good guess? How about the exhaust then? Do our pumps have "vanes" like these vacuum pumps?

As I've never taken my pump apart yet, I wouldn't know how it works. The rebuild kit is similar to the ones I've rebuilt, mostly seals, O-rings, etc.

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