Don't bother messing with that pump.
If your steering is fine, and you can lift the tractor with the bucket, there's nothing wrong with the system. If your pump was dry, that wouldn't happen. Any air you have in there will work it's way out as you use it. I wouldn't worry about a thing.
Once in a while on my 2015, I'll raise the bucket at high idle, and it will have a "jerk" in the movement also. Nothing to worry about.
I know how you feel though. It's a condition called "paranoia."
