Wheel hub bearing arm

I'm looking for some help on the arm/elbow attached to the wheel & hub assembly...
How does it come off the car? Screw and bolt has been taken off, pounding it like crazy with hammer.. It won't come off..
Or does it not come off..
Thanks

 

Pic? Sounds like you're trying to remove the Ball Joint.

 

https://www.autozone.com/loan-a-too...rator&fromString=search&isIgnoreVehicle=false

Drive this between the ball joint and the arm it mounts into.
Be sure to remove the nut almost only partially when driving in tool....then take it completely off after the joint is loose in it's mounting...old words of advice.

I hope this helps