Hello, I recently purchased a Zetor 6245 and have been working with it and learning about it along the way. Yesterday I was bush hogging with it most all day. It was in the position where PTO and Hydraulics both are engaged. I had been raising and lowering the front end loader all day. When I finished I simply moved the lever into the Hydraulic only position, all the way forward. Once I did I wasn't able to raise my bucket any longer. I have since tried both positions again and everything else I can think of. I filled the Hydraulics etc. Can anyone help me figure out what is wrong??? Thanks. Jim