Machine Builders Network+ Forums Machine Builders Network Tech Resources/Skills Hydraulics Hydraulics question

I've got a blower that mounts to the 3 point on the tractor and we use it to blow dust out of our chicken houses. It's pretty much a squirrel cage fan on a frame that uses the tractors remote hydraulics to rotate from side to side. I need to get a flow control valve to slow the swing down as it's WAY to fast and jerky. My main question is, is there a way to make this thing rotate on it's own instead of me moving it with remote lever without it costing an arm and a leg? I would like to be able to drive through the house without having to watch the front, back, ceiling, and walls. I would need to have a way to adjust the limits. Say 0° to 110° for the walls and part of the ceiling. Then maybe 45° to 135° for the center of the ceiling. I'll try to get some pics on here to help understand what I'm working with. In the meantime, thanks for any help