Re: [MBZ] Stinkin' Vacuum Pump

[Peter Frederick]

Diaphram should be installed in the slack position, TDC on the crank.  
Ditto if you remove the pump complete for any reason.  It would be 
somewhat difficult to install the diaphram at the "stretched" position 
as the only thing holding it in is the top cover, and hooking the 
screws through the diaphram with the lever out might be quite a bit of 
fun!

Peter