Leonz,
Thanks for the reply. I'm not sure what you mean by "a 2 oil pan configuration"? The oil pan on my 755 doesn't appear to have 2 pans, just one deep pan. As for fully draining the pan before I refilled it, I'm 99% sure it was fully drained. I let it drain for at least 1/2 hour before I closed it up. Today I drained the oil again and let it drain for close to an hour. There wasn't much oil coming out after the first couple of minutes. I took your advise and collected some of the oil in a glass jar, we'll know more tomorrow. I found it odd that the oil was so black, the motor ran for less then 10 hours since the last oil change. Just to throw it out there, I did add half a can of Sea Foam cleaner in the gas tank when I last changed all the fluid, could this have caused or added to the problem? I also took your advice and removed the gas tank and cleaned it out. When I removed the sending unit there was a small piece of the hose left that connects the screen to the tube, the screen was not attached nor did I find it when I cleaned out the tank, could it have dissolved? There was some sludge on the bottom of the tank but I'm thinking since the screen is missing I wasn't sucking the sludge up since the pick up tube is a good 1 to 2" from the bottom of the tank?
As for the hydraulic pump, it is located underneath the seat at the rear of the tractor, so I guess it can稚 be hydraulic fluid?