In Reply to: 8N hydraulics posted by jeff walker on February 19, 2018 at 22:24:22:
since it is not building the right amount of pressure, the exhaust control valve may be sticking. Pull the right side round cover off...
with the tractor shut off,
reach down thru the hole and try to move the exhaust valve against it's spring. If you can't move it, then it is most likely stuck.
I believe you can replace an exhaust valve without removing the pump. I haven't attempted it though.