Having some trouble with some r-vans not turning any more. I'm using a regulated 40 psi body. The issue i am having is they are stopping spinning so not properly watering any more.. What i have done so far, pull the top to flush. That didn't do anything. Adjusted arch, that help but would eventually get stuck. Increase distance and it would work a couple cycles, next week when i would check, same issue....I thought the company addressed this issue....by the way, how long is the commercial warrenty on it...Was bought and installed in August of this year.