I have a 2011 ford F-550 with a 19.5 aluminum rollback bed. I had a problem with the cylinder that slides the bed back. the nut came off the piston inside and the rod came out inside. When i got the cylinder back from the hydraulic shop i put it back in the truck and started having problems with spool in the valve body binding up. I finally snapped the control handle off and ordered a new valve body. After i installed it it does the same thing. any ideas?
Sounds as if there is debris in the system. Everything needs daylighted and cleaned thoroughly.