Disassembling EGR valve?

[alborz]

Thanks for your comments
Since I saw Rawze’s video on EGR tune up
I have taken out the EGR valve several times
This time however the valve doesn’t move freely
If I push it down to open position, it stays there unless I tap on it
If I grab the valve shaft with something I can spin it
Since the valve actuator job is to push dow the valve shaft
Is there anyway to check the actuator before I install it on the engine?