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Thanks guys! Gus..what do you suggest doing with the dremmel? I didn't notice any casting flash on my Melling HV63 pump! Should something on the pump be opened-up? Thanks! Randy



Is it a new pump? The last three Melling pumps that that I bought (they were the HP63) the cover and body of the pump were badly misaligned. Check the pressure side oil passage between the body and cover. On all three I had to enlarge the two small bolt holes in the cover then pinned it in the correct location. IIRC I also opened up that same oil passage in the cover to more closely match the oil passage diameter in the body. This was a few years ago, and in the HP pump, yours could be different.