Quote:
Originally Posted by averyphilly
Hi again. Thanks for the replies and advice, tangofox007 and my123ca. I removed the back cover and you were right, my123ca, one of the three check valves was cracked. I ordered a repair kit and will be replacing the valves and o-rings. Hopefully I will get much better vacuum then. I'll report the results after I put it all back together this weekend.
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Save the Old O-rings. Some kits have O-rings that are too thin in cross section to seal the Valves.
You might find a past thread on that; something like "Rebuilt Vacuum Pump but it is not holding Vacuum".