SVX

Question? I just ran my robart standard air kit in my TF At-6. Last night it worked okay but when they came up they were a little slow. Today I checked all my lines for leaks and filled the air to 100 psi and got nothing. Not down or up. I checked the adjustment valves and they were not closed down. I still have air pressure and can hear spurts when I open and close the valve. Just nothing happens to the retract. Any ideas? Did I some how ruin my valve?

SVX