Quote:
Originally Posted by engatwork
this is incorrect in my humble opinion
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If the Vacuum Pump has a good seal to it when it reaches the Max Vacuum the Piston stays push up or part way up held by the Vacuum and that Pivot/Folcrum Arm with the Bearing (I do not know the real name for it) is completely or partially not riding on the Lobes on the Timers. So it is either not moving or not moving very much.
If there is a Vacuum Leak the Piston and Arm are moving their full distance all of the time.
In a recent thread it was said that the later models have a Van type Vacuum Pump. On those it is always turning.