Im new to this site, so bare with me. I just recently purchased an rc30. It seems like the loader while lifting is slow sometimes and the same thing for the curl. It pulled the loader relief valve to check the o-rings and sure enough one was bad. Replaced both but didn't seem to help. Also replaced the hydraulic filter. If I curl the bucket before lifting it seems to be better. Anyone have any ideas of what to check? I did talk to a mechanic and he said that the relief valve could be bad. How would you check it?