You might just fix it when you repair the broken line. The reservoir acts just like the tin can that some of us put on the older vehicles with vacuum wipers. It provides a reserve of vacuum, similar to a pressure vessel on an in ground well system. The advantage of a vacuum system is that it uses diaphragms or pistons to move mechanical devices to do work efficiently and it is easy to control. Once you get that pump so it does not run all the time, you will most likely find that the hubs and heating system works ok.

 

Fix that one line and you'll probably have problem solved.

 

ok guys. I'll order the parts. Let you know how it goes.

 

You might want to hold a finger over that broken end and see if the pump stops in minute or less. If it does that's the whole problem. Mine runs for about 35 seconds to pull the tank down.