Yes, I get what you are saying. And I have done that for my short term fix. But, there is still a torn diaphragm with vacuum sucked in junk from the outside world. It is then held there by what is left of the diaphragm. It is too cold out right now to do the complete job. But for the time being I found the hole in the diaphragm and sprayed in storage oil. This will help keep the inside of the hub from rusting up. To me just doing the vacuum line seems too HA. Especially with bearings being inside there.
There is no bearings in there. The hub actuator is separate from the bearing hub.