Thanks for all the tips guys. I did take the servo arm off and push the plunger in by hand to make sure that it is in all the way. I still get the same dragging after the brakes have been applied and released. What makes me think it is a leak is that after letting the plane sit overnight the wheels spin freely, but if I apply the brakes once then the drag when released again. I will try taking off the wheels and lubing the O rings to see if that cures it. If not, I may go back to the stock brake valve supplied and return this one for service. I did verify that the pressure line is attached to the plunger.

Woody