Unable to Remove Dirt King Upper Control Arm

Trying to take off my dirt king upper control arms on my 2017 Tacoma in order to adjust the preload on my kings. I can’t get the ball joint bolt free from the knuckle. The arm just moves with the knuckle when I hit it with a hammer. Any suggestions?

 

I’ve had to beat the spindle with a 5lb sledge. Are you hitting the flat spot on the spindle where the ball joint seats?

 

Just got it, took a massive beating to get it loose but it finally did come loose. Thanks for the reply!

 

I guess if you are having this issue and you think you are beating it hard enough, you aren’t. Haha