I recently installed a new 16 GPM pump on my ancient Simpsons Sears splitter. It has the pressure relief set at 2,250 PSI. The original Cross valve relief is set at 2,000 PSI. I stuck a gauge on the cylinder and it never goes above 2,000 PSI so the valve is controlling the pressure.
My dad stuck a 8 HP Briggs engine on this back in the 1970s. With the new pump this old 9-1/2 ton splitter outruns his new 26 ton splitter by at least a factor of 2.
Years ago I bought a Northern Hydraulics (Tool?) wagon rated for 1,000 pounds. First time I put a 650 pound Chrysler 440 engine on it all 4 axles bent. I was able to repair it but I would say it is good for 300 Pounds.