Did you get all your balls back in?
And did you get them all back in their 3-thread ball track?
When one or two of my balls fell out of the track and were rattling around inside the power piston space (one in front of the piston and one behind it) I noticed the travel of the piston (by moving the pitman arm) would bind up at the extremities of the travel (all the way left or right).
Thankfully noticed this before reinstalling so was able to figure it out w/o much ado.
Will say tho that I ran a couple balls short of the total amount for a few months, also w/o much ado, albeit a smidge heavier feeling. But they were all in the tracks too, so none were free rolling and had no binding going on.