Quote:
Originally Posted by pgringo
what vac output should a om617 have? my pump is cranking about 8 inches of vac.
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A good Vacuum Pump should put out 22-24 in Hg.
I don't think My Vacuum was that Low but I was having Hard breaking. And I removed and sprayed out the Vacuum Pump Check Valve that is right under where the Main Line Attaches to the Vacuum Pump and it restored My Vacuum.
Some have found the internal parts of the Check Valve Broken or even missing.
Don't use Brake Cleaner as part of the Valve is Plastic and the Brake Cleaner may soften the Valve.
This is a barrowed pic. All of the parts you see are not supposed to be loose like they are. They are supposed to be inside of the vlave.