I recently purchased a 1983 5011 from a friend. I parked it and corrected some wiring issues (mice). I then went to start and move it but the loader will not operate. I believe I have all of the controls in the correct position but I don't know for sure. I have the PTO / Pump selector full forward which I believe runs the PTO and pump. I have tried most every combination I can think of with no luck any help would be appreciated.