Thanks for the pictures. Your tractor does not have the standpipe kit which raises the level of oil in the hydraulic system. The key word you mentioned is &quot;hill&quot; When the tractor is on a hill as you mentioned the pump pulls in air which over time is a killer for the pump and also causes heat. You also have a seal leaking somewhere and sometime in the off season I would take the unit off and make the press test to see where your leak is. Let me do a little checking for you I will need your e-mail and maybe your U. S. Mail address as well to send you some information. The first thing to do SOON is to raise the hydraulic oil level. John