530 hours on tractor.
After disking about 30 minutes the 3 pt lower arms won't lower the harrow unless I shut the engine down. Then it drops. I'm disking ~300 feet, lifting, turning around, then try to lower disk for next strip. It was doing this before I serviced the hydraulic system, and now still doing it after servicing....changed hyd oil, hyd filter, and cleaned inner metal screen.
Sure don't want to have to send it to the shop. I know if they go into the rockshaft area it's gonna be expensive just for labor, plus about $130 pickup/delivery.
Any advice? Thanks.