After I put my lift spindles on I've been having a problem when I make hard turns the brakes do not work and i have to pump them back up to get them working its already almost caused an accident. I grinded off the old steering stops and put the new ones on and it still does it.

 

Something I would suggest checking is brake hoses. When lifting many times the original hoses where just long enough to work. On hard stops the hoses can pinch off creating restrictions in fluid flow that will prevent hydraulic pressure from reaching the calipers. Look at the brake hose routing and mounting. Brake hoses that are longer can sometimes be needed to correct the issue, especially since you've noticed the brakes are only affected on hard turns.