We've been having similar problems with my fathers 5045e. Ever since new it has had trouble with the setting/linkage on the 3pt valve, as someone else noted if you just raise the lever the oil will continue to flow through the valve until you bump the lever down slightly (happens at any position.) I figured it was a problem that was just in the linkage and haven't got around to tearing into it to fix it. All the people who operated this tractor know to bump the lever back down to keep the oil from circulating. Move ahead to hay season this year: Tractor started loosing power after tedding hay for several hours, tractor seemed hot but registered normal on the gauge. When this would happen the transmission also became hard to shift. This happened on multiple occasions throughout hay season. Later I found out that the SCV levers are also sticking some and aren't really in neutral when you think they are. My theory is that when lifting the tedder wings (hydraulic fold) the levers were sometimes sticking in the 'not-quite-neutral' range, forcing and circulating oil, and building up lots of heat. The tractor would bog down because of the fluid trying to be forced though the system and trans was hard to shift because the oil was so hot and thin. When not using the rear SCV valves this doesn't happen. I think the problem with those is the actual pivot for the levers or the linkage is sticky, or possibly the neutral detent springs aren't doing their jobs. Luckily we haven't melted the fuel tank yet, but it is an unusual and consternating problem.