I knowingly bought this tilt problem 3 years ago and decided to repair it as I have no trailer. Pump motor works and seals were allowing hydraulic fluid to pass over piston creating a fluid lock mess. I've replaced the seals and o rings inside piston and end cap and the unit accepted about 8 oz of fluid, but will not lift or lower more than a few degrees. It acts like it needs more fluid, but using a comealong to raise still doesn't seem to allow addition of more fluid. Manual bypass seals look good. Any ideas or recommendations for a good mechanic in the Athens area? Maybe a hydraulic pathway plugged or usual problem to these single ram units?