Sometimes oil is in the pump drive socket so when you go to pull out the shaft or the hex drive it creates a suction. I needed to prime my motor so I had a long 1/4” drive extension and a hex bit. I tacked welded the bit to the extension knowing the issue with suction and how much it would suck it the bit came off. Worked great until I pulled it out and the hex piece came out of the bit!!!!!!! I got it out be taking a 1/4” drive socket and crushing it just a touch. Tapped it on the hex piece that was still in the pump out it came. Tacked everything together!
