I am new to this forum and I have a question about the 3 point system on a new to me Ford Jubilee I just purchased. When I try to lift the 3 point it sometimes lifts up and other times not at all. I checked the hydraulic pump out which is a piston style pump and it seems to be keeping primed and working when I pull the top plug off to check. When I lift up the three point it is always very slow to respond. Sometimes it is a few seconds before it lifts. It stays up but when I lower it and try to lift it again it sometimes goes up but most of the time doesn't. It doesn't lift very high either. It lifts up maybe 12" at the most when I lift the position lever up to the top. The hydraulic oil looks clean and clear on the dip stick. Any thoughts on what might be wrong would be appreciated.