Good idea. I recall having to change the load control shaft to fix a hydraulic leak when I first got the tractor. I'm wondering if we did something wrong in that job. Sometimes when I lower the implement, it will suddenly just rise on its own.
I remember being amazed at the time when I first read how the L/D mechanism worked. I surprises me that they don't all develop leaks, what with the abuse we put on the three point hitch doing things like pushing up privet with a box blade.