Re: Oil after Oil Pump Upgrade

Posted by 56Clippers On 2025/4/14 12:47:07

The Melling M-22F AND M-22FHV pumps both come with a standard pressure relief valve that opens at 50 psi.
There is an optional spring for the relief valve to make it open at 65 psi.
Unfortunately Melling does not have the nice charts for these pumps that they have for their high performance line of pumps.
You may want to put a pressure gauge on and get actual pressure numbers. Knowing provides much more peace of mind than guessing.