REPLACED LEAKING POWER STEERING LINE NOW NO POWER STEERING

You probably have air in system. Make sure power steering is full when you start. Jack up the front wheels and put jack stands under truck then turn wheels to lock one way then the other do this 5 times. Then check fluid. Only do this at idle repeat this until all air is out of system. You really need a vacuum pump to do this first but you probably don't so this is next best thing. Make sure all your connections to new hose and o-rings were installed as well.