Actually, I thought the written spec was 2500#, they just never came set to that.
2500# seems to be a pretty standard pressure, what varies is the GPM of differnet tractors.
Also consider that your not going to hit the max pressure unless you put that much load on it, or run a cylinder all the way to the end, which is probably hardest on the system. Because all of a sudden the fluid has nowhere to go. You've probably noticed how the sytem kind of bucks and loads until the relief valve has time to open. This delay makes engine RPM a contributing factor even though it doesn't affect pressure, it does affect the pressure spike while the relief valve opens. IMHO, how you use the hydraulic will have a much larger affect on issues than years or hours, so it will be hard to come up with any real statistics from the relatively small sample of 790 owners around here. The vast majority of my loader work is done around the 1200 rpm range, everthing is slow and smooth. I generally don't snatch the control around causing abrupt movement of the loader and things like that, so I really expect the difference in lifespan to be un-mesureable. But, even if it is, the improved user experience is worth it. I did a fairly large digging project last year and still only put about 50 hours on the tractor.
