I recently acquired one of my dad's old tractors (a 1967 806D). I've got it cranked and running but it has no hydraulics. No brakes, steering, or PTO for sure. Have not hooked an implement to it to see if remotes are working. Tractor has set up for at least 3 years. I was told all of the steering, brakes, and hydraulics went out prior to previous owners parking it. They said they changed the hydraulic filter and fluid in an attempt to fix it but could not get any of these areas to work. I spoke to the guy who worked for them and he said he changed an internal filter on the right side under the platform and the fluid. Any help wouold be appreciated